1
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Bounds CC, Duff JP, Tritt A, Taylor HAM, Coe GX, White SJ, Turner LD. Quantum Spectral Analysis by Continuous Measurement of Landau-Zener Transitions. PHYSICAL REVIEW LETTERS 2024; 132:093401. [PMID: 38489644 DOI: 10.1103/physrevlett.132.093401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 01/17/2024] [Indexed: 03/17/2024]
Abstract
We demonstrate the simultaneous estimation of signal frequency and amplitude by a single quantum sensor in a single experimental shot. Sweeping the qubit splitting linearly across a span of frequencies induces a nonadiabatic Landau-Zener transition as the qubit crosses resonance. The signal frequency determines the time of the transition, and the amplitude its extent. Continuous weak measurement of this unitary evolution informs a parameter estimator retrieving precision measurements of frequency and amplitude. Implemented on radio-frequency-dressed ultracold atoms read out by a Faraday spin-light interface, we sense a magnetic signal with estimated sensitivities to amplitude of 11 pT/sqrt[Hz], frequency 0.026 Hz/Hz^{3/2}, and phase 0.084 rad/sqrt[Hz], in a single 300 ms sweep from 7 to 13 kHz. The protocol realizes a swept-sine quantum spectrum analyzer, potentially sensing hundreds or thousands of channels with a single quantum sensor.
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Affiliation(s)
- Christopher C Bounds
- School of Physics and Astronomy, Monash University, Melbourne, Victoria 3800, Australia
| | - Josh P Duff
- School of Physics and Astronomy, Monash University, Melbourne, Victoria 3800, Australia
| | - Alex Tritt
- School of Physics and Astronomy, Monash University, Melbourne, Victoria 3800, Australia
| | - Hamish A M Taylor
- School of Physics and Astronomy, Monash University, Melbourne, Victoria 3800, Australia
| | - George X Coe
- School of Physics and Astronomy, Monash University, Melbourne, Victoria 3800, Australia
| | - Sam J White
- School of Physics and Astronomy, Monash University, Melbourne, Victoria 3800, Australia
| | - L D Turner
- School of Physics and Astronomy, Monash University, Melbourne, Victoria 3800, Australia
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2
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Hill JC, Holland WK, Kunz PD, Cox KC, Penttinen JP, Kantola E, Meyer DH. Intra-cavity frequency-doubled VECSEL system for narrow linewidth Rydberg EIT spectroscopy. OPTICS EXPRESS 2022; 30:41408-41421. [PMID: 36366620 DOI: 10.1364/oe.473676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
High-power, narrow-linewidth light sources in the visible and UV spectra are in growing demand, particularly as quantum information and sensing research proliferates. Vertical external-cavity surface-emitting lasers (VECSELs) with intra-cavity frequency conversion are emerging as an attractive platform to fill these needs. Using such a device, we demonstrate 3.5 MHz full-width half-maximum Rydberg-state spectroscopy via electromagnetically induced transparency (EIT). The laser's 690 mW of output power at a wavelength of 475 nm enables large Rabi frequencies and strong signal-to-noise ratio in shorter measurement times. In addition, we characterize the frequency stability of the VECSEL using the delayed self-heterodyne technique and direct comparison with a commercial external-cavity diode laser (ECDL). We measure the pre-doubled light's Lorentzian linewidth to be 2π × 5.3(2) kHz, and the total linewidth to be 2π × 23(2) kHz. These measurements provide evidence that intra-cavity frequency-doubled VECSELs can perform precision spectroscopy at and below the MHz level, and are a promising tool for contemporary, and future, quantum technologies.
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3
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Craven JM, Meeks E, Delich G, Ayars E, Pechkis HK, Pechkis JA. A low-cost shutter driver and arbitrary waveform generator for optical switching using a programmable system-on-chip (PSoC) device. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:113002. [PMID: 36461551 DOI: 10.1063/5.0105884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 10/30/2022] [Indexed: 06/17/2023]
Abstract
We have developed a low-cost mechanical shutter driver with integrated arbitrary waveform generation for optical switching and control using a programmable system-on-chip device. This microcontroller-based device with configurable digital and analog blocks is readily programmed using free software, allowing for easy customization for a variety of applications. Additional digital and analog outputs with arbitrary timings can be used to control a variety of devices, such as additional shutters, acousto-optical modulators, or camera trigger pulses, for complete control and imaging of laser light. Utilizing logic-level control signals, this device can be readily integrated into existing computer control and data acquisition systems for expanded hardware capabilities.
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Affiliation(s)
- J M Craven
- Department of Physics, California State University, Chico, California 95929, USA
| | - E Meeks
- Department of Physics, California State University, Chico, California 95929, USA
| | - G Delich
- Department of Physics, California State University, Chico, California 95929, USA
| | - E Ayars
- Department of Physics, California State University, Chico, California 95929, USA
| | - H K Pechkis
- Department of Physics, California State University, Chico, California 95929, USA
| | - J A Pechkis
- Department of Physics, California State University, Chico, California 95929, USA
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4
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Barker DS, Norrgard EB, Klimov NN, Fedchak JA, Scherschligt J, Eckel S. Λ-enhanced gray molasses in a tetrahedral laser beam geometry. OPTICS EXPRESS 2022; 30:9959-9970. [PMID: 35299409 PMCID: PMC9843705 DOI: 10.1364/oe.444711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
We report the observation of sub-Doppler cooling of lithium using an irregular-tetrahedral laser beam arrangement, which is produced by a nanofabricated diffraction grating. We are able to capture 11(2)% of the lithium atoms from a grating magneto-optical trap into Λ-enhanced D1 gray molasses. The molasses cools the captured atoms to a radial temperature of 60(9) μK and an axial temperature of 23(3) μK. In contrast to results from conventional counterpropagating beam configurations, we do not observe cooling when our optical fields are detuned from Raman resonance. An optical Bloch equation simulation of the cooling dynamics agrees with our data. Our results show that grating magneto-optical traps can serve as a robust source of cold atoms for tweezer-array and atom-chip experiments, even when the atomic species is not amenable to sub-Doppler cooling in bright optical molasses.
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Affiliation(s)
- D. S. Barker
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - E. B. Norrgard
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - N. N. Klimov
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - J. A. Fedchak
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - J. Scherschligt
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - S. Eckel
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
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5
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Bhatt RP, Kilinc J, Höcker L, Jendrzejewski F. Stochastic dynamics of a few sodium atoms in presence of a cold potassium cloud. Sci Rep 2022; 12:2422. [PMID: 35165302 PMCID: PMC8844084 DOI: 10.1038/s41598-022-05778-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 01/14/2022] [Indexed: 11/15/2022] Open
Abstract
Single particle resolution is a requirement for numerous experimental protocols that emulate the dynamics of small systems in a bath. Here, we accurately resolve through atom counting the stochastic dynamics of a few sodium atoms in presence of a cold potassium cloud. This capability enables us to rule out the effect of inter-species interaction on sodium atom number dynamics, at very low atomic densities present in these experiments. We study the noise sources for sodium and potassium in a common framework. Thereby, we assign the detection limits to 4.3 atoms for potassium and 0.2 atoms (corresponding to 96% fidelity) for sodium. This opens possibilities for future experiments with a few atoms immersed in a quantum degenerate gas.
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6
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Trenkwalder A, Zaccanti M, Poli N. A flexible system-on-a-chip control hardware for atomic, molecular, and optical physics experiments. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:105103. [PMID: 34717387 DOI: 10.1063/5.0058986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/13/2021] [Indexed: 06/13/2023]
Abstract
We have implemented a control system core for experiments in atomic, molecular, and optical physics based on a commercial low-cost board, featuring a field-programmable gate array as part of a system-on-a-chip on which a Linux operating system is running. The board features Gigabit Ethernet, allowing for fast data transmission and operation of remote experimental systems. A single board can control a set of devices generating digital, analog, and radio frequency signals with precise timing given either by an external or internal clock. Contiguous output and input sampling rates of up to 40 MHz are achievable. Several boards can run synchronously with a timing error approaching 1 ns. For this purpose, a novel auto-synchronization scheme is demonstrated, with possible application in complex distributed experimental setups with demanding timing requests.
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Affiliation(s)
- A Trenkwalder
- Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (INO-CNR), 50019 Sesto Fiorentino, Italy
| | - M Zaccanti
- Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (INO-CNR), 50019 Sesto Fiorentino, Italy
| | - N Poli
- Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (INO-CNR), 50019 Sesto Fiorentino, Italy
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7
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Sitaram A, Campbell GK, Restelli A. Programmable system on chip for controlling an atomic physics experiment. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:055107. [PMID: 34243343 DOI: 10.1063/5.0047535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 05/05/2021] [Indexed: 06/13/2023]
Abstract
Most atomic physics experiments are controlled by a digital pattern generator used to synchronize all equipment by providing triggers and clocks. Recently, the availability of well-documented open-source development tools has lifted the barriers to using programmable systems on chip (PSoCs), making them a convenient and versatile tool for synthesizing digital patterns. Here, we take advantage of these advancements in the design of a versatile clock and pattern generator using a PSoC. We present our design with the intent of highlighting the new possibilities that PSoCs have to offer in terms of flexibility. We provide a robust hardware carrier and basic firmware implementation that can be expanded and modified for other uses.
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Affiliation(s)
- A Sitaram
- Joint Quantum Institute, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA
| | - G K Campbell
- Joint Quantum Institute, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA
| | - A Restelli
- Joint Quantum Institute, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA
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8
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Sitaram A, Elgee PK, Campbell GK, Klimov NN, Eckel S, Barker DS. Confinement of an alkaline-earth element in a grating magneto-optical trap. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:103202. [PMID: 33138581 DOI: 10.1063/5.0019551] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/30/2020] [Indexed: 05/22/2023]
Abstract
We demonstrate a compact magneto-optical trap (MOT) of alkaline-earth atoms using a nanofabricated diffraction grating chip. A single input laser beam, resonant with the broad 1S0 → 1P1 transition of strontium, forms the MOT in combination with three diffracted beams from the grating chip and a magnetic field produced by permanent magnets. A differential pumping tube limits the effect of the heated, effusive source on the background pressure in the trapping region. The system has a total volume of around 2.4 l. With our setup, we have trapped up to 5 × 106 88Sr atoms at a temperature of ∼6 mK, and with a trap lifetime of ∼1 s. Our results will aid the effort to miniaturize quantum technologies based on alkaline-earth atoms.
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Affiliation(s)
- A Sitaram
- Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - P K Elgee
- Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - G K Campbell
- Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - N N Klimov
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - S Eckel
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - D S Barker
- Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
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9
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Karg TM, Gouraud B, Ngai CT, Schmid GL, Hammerer K, Treutlein P. Light-mediated strong coupling between a mechanical oscillator and atomic spins 1 meter apart. Science 2020; 369:174-179. [DOI: 10.1126/science.abb0328] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 04/28/2020] [Indexed: 11/02/2022]
Abstract
Engineering strong interactions between quantum systems is essential for many phenomena of quantum physics and technology. Typically, strong coupling relies on short-range forces or on placing the systems in high-quality electromagnetic resonators, which restricts the range of the coupling to small distances. We used a free-space laser beam to strongly couple a collective atomic spin and a micromechanical membrane over a distance of 1 meter in a room-temperature environment. The coupling is highly tunable and allows the observation of normal-mode splitting, coherent energy exchange oscillations, two-mode thermal noise squeezing, and dissipative coupling. Our approach to engineering coherent long-distance interactions with light makes it possible to couple very different systems in a modular way, opening up a range of opportunities for quantum control and coherent feedback networks.
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Affiliation(s)
- Thomas M. Karg
- Department of Physics and Swiss Nanoscience Institute, University of Basel, 4056 Basel, Switzerland
| | - Baptiste Gouraud
- Department of Physics and Swiss Nanoscience Institute, University of Basel, 4056 Basel, Switzerland
| | - Chun Tat Ngai
- Department of Physics and Swiss Nanoscience Institute, University of Basel, 4056 Basel, Switzerland
| | - Gian-Luca Schmid
- Department of Physics and Swiss Nanoscience Institute, University of Basel, 4056 Basel, Switzerland
| | - Klemens Hammerer
- Institute for Theoretical Physics and Institute for Gravitational Physics (Albert Einstein Institute), Leibniz Universität Hannover, 30167 Hannover, Germany
| | - Philipp Treutlein
- Department of Physics and Swiss Nanoscience Institute, University of Basel, 4056 Basel, Switzerland
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10
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Bertoldi A, Feng CH, Eneriz H, Carey M, Naik DS, Junca J, Zou X, Sabulsky DO, Canuel B, Bouyer P, Prevedelli M. A control hardware based on a field programmable gate array for experiments in atomic physics. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:033203. [PMID: 32260006 DOI: 10.1063/1.5129595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 02/19/2020] [Indexed: 06/11/2023]
Abstract
Experiments in Atomic, Molecular, and Optical (AMO) physics require precise and accurate control of digital, analog, and radio frequency (RF) signals. We present control hardware based on a field programmable gate array core that drives various modules via a simple interface bus. The system supports an operating frequency of 10 MHz and a memory depth of 8 M (223) instructions, both easily scalable. Successive experimental sequences can be stacked with no dead time and synchronized with external events at any instructions. Two or more units can be cascaded and synchronized to a common clock, a feature useful to operate large experimental setups in a modular way.
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Affiliation(s)
- A Bertoldi
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - C-H Feng
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - H Eneriz
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - M Carey
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - D S Naik
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - J Junca
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - X Zou
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - D O Sabulsky
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - B Canuel
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - P Bouyer
- LP2N, Laboratoire Photonique, Numérique et Nanosciences, Univ. Bordeaux-IOGS-CNRS:UMR 5298, F-33400 Talence, France
| | - M Prevedelli
- Dipartimento di Fisica e Astronomia, Università di Bologna, Via Berti-Pichat 6/2, I-40126 Bologna, Italy
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11
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Cox KC, Meyer DH, Castillo ZA, Fatemi FK, Kunz PD. Spin-Wave Multiplexed Atom-Cavity Electrodynamics. PHYSICAL REVIEW LETTERS 2019; 123:263601. [PMID: 31951441 DOI: 10.1103/physrevlett.123.263601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Indexed: 06/10/2023]
Abstract
We introduce multiplexed atom-cavity quantum electrodynamics with an atomic ensemble coupled to a single optical cavity mode. Multiple Raman dressing beams establish cavity-coupled spin-wave excitations with distinctive spatial profiles. Experimentally, we demonstrate the concept by observing spin-wave vacuum Rabi splittings, selective superradiance, and interference in the cavity-mediated interactions of two spin waves. We highlight that the current experimental configuration allows rapid, interchangeable cavity coupling to 4 profiles with an overlap parameter of less than 10%, enough to demonstrate, for example, a quantum repeater network simulation in the cavity. With further improvements to the optical multiplexing setup, we infer the ability to access more than 10^{3} independent spin-wave profiles.
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Affiliation(s)
- Kevin C Cox
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA
| | - David H Meyer
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA
| | - Zachary A Castillo
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA
- Department of Physics, University of Maryland, College Park, Maryland 20742, USA
| | - Fredrik K Fatemi
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA
| | - Paul D Kunz
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA
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12
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Donnellan S, Hill IR, Bowden W, Hobson R. A scalable arbitrary waveform generator for atomic physics experiments based on field-programmable gate array technology. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:043101. [PMID: 31043041 DOI: 10.1063/1.5051124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 12/16/2018] [Indexed: 06/09/2023]
Abstract
We present a field-programmable gate array (FPGA) based control system that has been implemented to control a strontium optical lattice clock at the National Physical Laboratory, UK. Bespoke printed circuit boards have been designed and manufactured, including an 8-channel, 16-bit digital to analog converter board with a 2 μs update rate and a 4-channel direct-digital synthesis board clocked at 1 GHz. Each board includes its own FPGA with 28 digital output lines available alongside the specialized analog or radio frequency outputs. The system is scalable to a large number of control lines by stacking the individual boards in a master-slave arrangement. The timing of the digital and analog outputs is based on the FPGA clock and is thus very predictable and exhibits low jitter. A particular advantage of our hardware is its large data buffers that, when combined with a pseudoclock structure, allow complex waveforms to be created. A high reliability of the system has been demonstrated during extended atomic clock frequency comparisons.
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Affiliation(s)
- Sean Donnellan
- National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Ian R Hill
- National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - William Bowden
- National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Richard Hobson
- National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
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13
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Perego E, Pomponio M, Detti A, Duca L, Sias C, Calosso CE. A scalable hardware and software control apparatus for experiments with hybrid quantum systems. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:113116. [PMID: 30501333 DOI: 10.1063/1.5049120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 10/17/2018] [Indexed: 06/09/2023]
Abstract
Modern experiments with fundamental quantum systems - like ultracold atoms, trapped ions, and single photons - are managed by a control system formed by a number of input/output electronic channels governed by a computer. In hybrid quantum systems, where two or more quantum systems are combined and made to interact, establishing an efficient control system is particularly challenging due to the higher complexity, especially when each single quantum system is characterized by a different time scale. Here we present a new control apparatus specifically designed to efficiently manage hybrid quantum systems. The apparatus is formed by a network of fast communicating Field Programmable Gate Arrays (FPGAs), the action of which is administrated by a software. Both hardware and software share the same tree-like structure, which ensures a full scalability of the control apparatus. In the hardware, a master board acts on a number of slave boards, each of which is equipped with an FPGA that locally drives analog and digital input/output channels and radiofrequency outputs up to 400 MHz. The software is designed to be a general platform for managing both commercial and home-made instruments in a user-friendly and intuitive graphical user interface. The architecture ensures that complex control protocols can be carried out, such as performing of concurrent commands loops by acting on different channels, the generation of multi-variable error functions, and the implementation of self-optimization procedures. Although designed for managing experiments with hybrid quantum systems, in particular with atom-ion mixtures, this control apparatus can in principle be used in any experiment in atomic, molecular, and optical physics.
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Affiliation(s)
- Elia Perego
- Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
| | - Marco Pomponio
- Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
| | - Amelia Detti
- Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, I-10135 Torino, Italy
| | - Lucia Duca
- Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, I-10135 Torino, Italy
| | - Carlo Sias
- Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, I-10135 Torino, Italy
| | - Claudio E Calosso
- Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, I-10135 Torino, Italy
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14
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Wigley PB, Everitt PJ, van den Hengel A, Bastian JW, Sooriyabandara MA, McDonald GD, Hardman KS, Quinlivan CD, Manju P, Kuhn CCN, Petersen IR, Luiten AN, Hope JJ, Robins NP, Hush MR. Fast machine-learning online optimization of ultra-cold-atom experiments. Sci Rep 2016; 6:25890. [PMID: 27180805 PMCID: PMC4867626 DOI: 10.1038/srep25890] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 04/21/2016] [Indexed: 12/04/2022] Open
Abstract
We apply an online optimization process based on machine learning to the production of Bose-Einstein condensates (BEC). BEC is typically created with an exponential evaporation ramp that is optimal for ergodic dynamics with two-body s-wave interactions and no other loss rates, but likely sub-optimal for real experiments. Through repeated machine-controlled scientific experimentation and observations our ‘learner’ discovers an optimal evaporation ramp for BEC production. In contrast to previous work, our learner uses a Gaussian process to develop a statistical model of the relationship between the parameters it controls and the quality of the BEC produced. We demonstrate that the Gaussian process machine learner is able to discover a ramp that produces high quality BECs in 10 times fewer iterations than a previously used online optimization technique. Furthermore, we show the internal model developed can be used to determine which parameters are essential in BEC creation and which are unimportant, providing insight into the optimization process of the system.
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Affiliation(s)
- P B Wigley
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - P J Everitt
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - A van den Hengel
- Australian Centre for Visual Technologies, University of Adelaide, Adelaide, 5005, Australia
| | - J W Bastian
- School of Computer Science, University of Adelaide, Adelaide, 5005, Australia
| | - M A Sooriyabandara
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - G D McDonald
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - K S Hardman
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - C D Quinlivan
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - P Manju
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - C C N Kuhn
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - I R Petersen
- School of Engineering and Information Technology, University of New South Wales at the Australian Defence Force Academy, Canberra, 2600, Australia
| | - A N Luiten
- Institute for Photonics &Advanced Sensing, School of Physical Sciences,The University of Adelaide, Adelaide, 5005, Australia
| | - J J Hope
- Department of Quantum Science, Australian National University, Canberra, 2601, Australia
| | - N P Robins
- Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Acton, 2601, Australia
| | - M R Hush
- School of Engineering and Information Technology, University of New South Wales at the Australian Defence Force Academy, Canberra, 2600, Australia
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Hou X, Hodges BR, Negusse S, Barker C. A multi-model Python wrapper for operational oil spill transport forecasts. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/1749-4699/8/1/014004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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