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Ji SC, Schweigler T, Tajik M, Cataldini F, Sabino J, Møller FS, Erne S, Schmiedmayer J. Floquet Engineering a Bosonic Josephson Junction. Phys Rev Lett 2022; 129:080402. [PMID: 36053681 DOI: 10.1103/physrevlett.129.080402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
We study Floquet engineering of the tunnel coupling between a pair of one-dimensional bosonic quasicondensates in a tilted double-well potential. By modulating the energy difference between the two wells, we reestablish tunnel coupling and precisely control its amplitude and phase. This allows us to initiate coherence between two initially uncorrelated Bose gases and prepare different initial states in the emerging sine-Gordon Hamiltonian. We fully characterize the Floquet system and study the dependence of both equilibrium properties and relaxation on the modulation.
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Affiliation(s)
- Si-Cong Ji
- Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, Technical University Wien, 1020 Vienna, Austria
| | - Thomas Schweigler
- Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, Technical University Wien, 1020 Vienna, Austria
- JILA, University of Colorado, CO 80309 Boulder, Colorado, USA
| | - Mohammadamin Tajik
- Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, Technical University Wien, 1020 Vienna, Austria
| | - Federica Cataldini
- Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, Technical University Wien, 1020 Vienna, Austria
| | - João Sabino
- Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, Technical University Wien, 1020 Vienna, Austria
- Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
- Instituto de Telecomunicações, Physics of Information and Quantum Technologies Group, 1049-001 Lisbon, Portugal
| | - Frederik S Møller
- Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, Technical University Wien, 1020 Vienna, Austria
| | - Sebastian Erne
- Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, Technical University Wien, 1020 Vienna, Austria
| | - Jörg Schmiedmayer
- Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, Technical University Wien, 1020 Vienna, Austria
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Tajik M, Rauer B, Schweigler T, Cataldini F, Sabino J, Møller FS, Ji SC, Mazets IE, Schmiedmayer J. Designing arbitrary one-dimensional potentials on an atom chip. Opt Express 2019; 27:33474-33487. [PMID: 31878416 DOI: 10.1364/oe.27.033474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/16/2019] [Indexed: 06/10/2023]
Abstract
We use laser light shaped by a digital micro-mirror device to realize arbitrary optical dipole potentials for one-dimensional (1D) degenerate Bose gases of 87Rb trapped on an atom chip. Superposing optical and magnetic potentials combines the high flexibility of optical dipole traps with the advantages of magnetic trapping, such as effective evaporative cooling and the application of radio-frequency dressed state potentials. As applications, we present a 160 µm long box-like potential with a central tuneable barrier, a box-like potential with a sinusoidally modulated bottom and a linear confining potential. These potentials provide new tools to investigate the dynamics of 1D quantum systems and will allow us to address exciting questions in quantum thermodynamics and quantum simulations.
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