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Shukhin A, Hurvitz I, Trajtenberg-Mills S, Arie A, Eisenberg H. Two-dimensional control of a biphoton joint spectrum. OPTICS EXPRESS 2024; 32:10158-10174. [PMID: 38571234 DOI: 10.1364/oe.510497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 01/12/2024] [Indexed: 04/05/2024]
Abstract
Control over the joint spectral amplitude of a photon pair has proved highly desirable for many quantum applications, since it contains the spectral quantum correlations, and has crucial effects on the indistinguishability of photons, as well as promising emerging applications involving complex quantum functions and frequency encoding of qudits. Until today, this has been achieved by engineering a single degree of freedom, either by custom poling nonlinear crystal or by shaping the pump pulse. We present a combined approach where two degrees of freedom, the phase-matching function, and the pump spectrum, are controlled. This approach enables the two-dimensional control of the joint spectral amplitude, generating a variety of spectrally encoded quantum states - including frequency uncorrelated states, frequency-bin Bell states, and biphoton qudit states. In addition, the joint spectral amplitude is controlled by photon bunching and anti-bunching, reflecting the symmetry of the phase-matching function.
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Clementi M, Sabattoli FA, Borghi M, Gianini L, Tagliavacche N, El Dirani H, Youssef L, Bergamasco N, Petit-Etienne C, Pargon E, Sipe JE, Liscidini M, Sciancalepore C, Galli M, Bajoni D. Programmable frequency-bin quantum states in a nano-engineered silicon device. Nat Commun 2023; 14:176. [PMID: 36635283 PMCID: PMC9837142 DOI: 10.1038/s41467-022-35773-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 12/29/2022] [Indexed: 01/14/2023] Open
Abstract
Photonic qubits should be controllable on-chip and noise-tolerant when transmitted over optical networks for practical applications. Furthermore, qubit sources should be programmable and have high brightness to be useful for quantum algorithms and grant resilience to losses. However, widespread encoding schemes only combine at most two of these properties. Here, we overcome this hurdle by demonstrating a programmable silicon nano-photonic chip generating frequency-bin entangled photons, an encoding scheme compatible with long-range transmission over optical links. The emitted quantum states can be manipulated using existing telecommunication components, including active devices that can be integrated in silicon photonics. As a demonstration, we show our chip can be programmed to generate the four computational basis states, and the four maximally-entangled Bell states, of a two-qubits system. Our device combines all the key properties of on-chip state reconfigurability and dense integration, while ensuring high brightness, fidelity, and purity.
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Affiliation(s)
- Marco Clementi
- grid.8982.b0000 0004 1762 5736Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy ,grid.5333.60000000121839049Present Address: Photonic Systems Laboratory (PHOSL), École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Federico Andrea Sabattoli
- grid.8982.b0000 0004 1762 5736Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy ,Present Address: Advanced Fiber Resources Milan S.r.L., Via Federico Fellini 4, 20097 San Donato Milanese, MI Italy
| | - Massimo Borghi
- grid.8982.b0000 0004 1762 5736Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy
| | - Linda Gianini
- grid.8982.b0000 0004 1762 5736Dipartimento di Ingegneria Industriale e dell’Informazione, Università di Pavia, Via Adolfo Ferrata 5, 27100 Pavia, Italy ,grid.457330.6Univ. Grenoble Alpes, CEA-Leti, 38054 Grenoble, France
| | - Noemi Tagliavacche
- grid.8982.b0000 0004 1762 5736Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy
| | - Houssein El Dirani
- grid.457330.6Univ. Grenoble Alpes, CEA-Leti, 38054 Grenoble, France ,Present Address: LIGENTEC SA, 224 Bd John Kennedy, 91100 Corbeil-Essonnes, France
| | - Laurene Youssef
- grid.463950.d0000 0004 0382 8743Univ. Grenoble Alpes, CNRS, LTM, 38000 Grenoble, France ,grid.9966.00000 0001 2165 4861Present Address: Univ. Limoges, CNRS, IRCER, UMR 7315, 87000 Limoges, France
| | - Nicola Bergamasco
- grid.8982.b0000 0004 1762 5736Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy
| | - Camille Petit-Etienne
- grid.463950.d0000 0004 0382 8743Univ. Grenoble Alpes, CNRS, LTM, 38000 Grenoble, France
| | - Erwine Pargon
- grid.5676.20000000417654326Univ. Grenoble Alpes, CNRS, CEA/LETI-Minatec, Grenoble INP, LTM, 38054 Grenoble, France
| | - J. E. Sipe
- grid.17063.330000 0001 2157 2938Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7 Canada
| | - Marco Liscidini
- grid.8982.b0000 0004 1762 5736Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy
| | - Corrado Sciancalepore
- grid.457330.6Univ. Grenoble Alpes, CEA-Leti, 38054 Grenoble, France ,Present Address: SOITEC SA, Parc technologique des Fontaines, Chemin des Franques, 38190 Bernin, France
| | - Matteo Galli
- grid.8982.b0000 0004 1762 5736Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy
| | - Daniele Bajoni
- grid.8982.b0000 0004 1762 5736Dipartimento di Ingegneria Industriale e dell’Informazione, Università di Pavia, Via Adolfo Ferrata 5, 27100 Pavia, Italy
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