Interference induced anisotropy in a two-dimensional dark state optical lattice
POSTER
Abstract
Traditionally, optical lattices are created by interfering light beams, trapping atoms at minima or maxima of the emerging interference pattern. Because the resulting potential follows the intensity of the optical field, its spatial structure is diffraction limited, limiting the lattice period to be no smaller than half the optical wavelength [1,2].
In this work we use the Lambda coupling scheme [3, 4, 5] with a control field containing two orthogonal standing waves (one of which is out-of-phase) to engineer a stwo-dimensional optical lattice with sub-wavelength characteristics by means of the geometric phase for the coherent dark state. By using two parameters: 1) the phase difference of the OOF standing wave, and 2) the amplitude ratio of the two orthogonal standing waves, one can control the tunneling parameters. The nonzero phase difference introduces a synthetic magnetic field which can be tuned to realize a weakly interacting tube model [6].
In this work we use the Lambda coupling scheme [3, 4, 5] with a control field containing two orthogonal standing waves (one of which is out-of-phase) to engineer a stwo-dimensional optical lattice with sub-wavelength characteristics by means of the geometric phase for the coherent dark state. By using two parameters: 1) the phase difference of the OOF standing wave, and 2) the amplitude ratio of the two orthogonal standing waves, one can control the tunneling parameters. The nonzero phase difference introduces a synthetic magnetic field which can be tuned to realize a weakly interacting tube model [6].
*This work was supported by the Research Council of Lithuania, Grant No. S-MIP-20-36. I. B. Spielman acknowledges support by the National In- stitute of Standards and Technology and the National Science Foundation through the Quantum Leap Challenge Institute for Robust Quantum Simulation (Grant No. OMA-2120757).
Publication: [1] I. Bloch et al., Reviews of Modern Physics 80, 885 (2008).
[2] N. Goldman et al., Reports on Progress in Physics 77, 126401 (2014).
[3] F. Jendrzejewski et al., Physical Review A 94, 063422 (2016).
[4] M. Łącki et al., Physical Review Letters 117, 233001 (2016).
[5] Y. Wang et al., Physical Review Letters 120, 083601 (2018).
[6] E. Gvozdiovas et al., Physical Review A 107, 033328 (2023).
Presenters
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Edvinas Gvozdiovas
- National Institute of Standards and Technology