Najbliższe seminaria

12 VIPiotr Sierant (ICFO, Barcelona, Spain)
Controlling entanglement at absorbing state phase transitions in random circuits
Gdzie: MS Teams [ZOA-test], 12:15
Seminarium Zakładowe
Online: [link]
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06-08.09.2023 - Konferencja "Time Crystals"

More details na stronie konferencji.

27.06-2.07.2022 - 6th Workshop on Algebraic Designs, Hadamard Matrices & Quanta

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05-11.09.2021 - Quantum Optics X

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Open Data

Current: /2106.04709

Arxiv link

Standard optical potentials use off-resonant laser standing wave induced AC-Stark shift. In a recent development [Phys. Rev. Lett. {\bf 117}, 233001 (2016)] a three-level scheme in Λ configuration coupled coherently by resonant laser fields was introduced leading to an effective lattice with subwavelength potential peaks. Here as an extension of that work to a four level atomic setup in the tripod configuration is used to create spin 1/2-like two-dimensional dark-space with 1D motion and the presence of external gauge fields. Most interestingly for a possible application, the lifetime for a dark subspace motion is up to two orders of magnitude larger than for a similar Λ system. The model is quite flexible leading to lattices with significant nearest, next-nearest, or next-next-nearest hopping rates, J1,J2,J3 opening up new intriguing possibilities to study, e.g. frustrated systems. The characteristic Wannier functions lead also to new type of inter-site interactions not realizable in typical optical lattices.

[Parent Directory]
BandsDIR Band structures for the Tripod system, in analogy to Fig. 3, panels a,b,c,d subsequently.
GaugePotentialsDIR Gauge potentials in Figs. 2 and 9.
HoppingsDIR Hoppings $J^\alpha$ as in Fig.6.
WannierFunctionsDIR Wannier functions in g1,g2,g3,e basis in position representation, $a=0.435$.