2020
DOI: 10.1103/physrevlett.124.070402
|View full text |Cite
|
Sign up to set email alerts
|

Tunable Nonreciprocal Quantum Transport through a Dissipative Aharonov-Bohm Ring in Ultracold Atoms

Abstract: We report the experimental observation of tunable, non-reciprocal quantum transport of a Bose-Einstein condensate in a momentum lattice. By implementing a dissipative Aharonov-Bohm (AB) ring in momentum space and sending atoms through it, we demonstrate a directional atom flow by measuring the momentum distribution of the condensate at different times. While the dissipative AB ring is characterized by the synthetic magnetic flux through the ring and the laser-induced loss on it, both the propagation direction … Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
89
1

Year Published

2020
2020
2024
2024

Publication Types

Select...
7
1

Relationship

1
7

Authors

Journals

citations
Cited by 164 publications
(90 citation statements)
references
References 57 publications
0
89
1
Order By: Relevance
“…Thus, the loss-induced increase in average photon number of the cavities in absence of any coherent drive is a feature possible only in a non-Hermitian system with a gain medium having quantum fluctuations. This feature of the nonequilibrium steady state thereby distinguishes our proposed setup from previous experiments involving gain in classical systems [35][36][37][38][39], as well as the existing experiments in the quantum regime which do not feature a gain medium [60][61][62][63][64][65][66][67][68][69].…”
Section: B Loss-induced Lasing and Amplificationmentioning
confidence: 76%
See 2 more Smart Citations
“…Thus, the loss-induced increase in average photon number of the cavities in absence of any coherent drive is a feature possible only in a non-Hermitian system with a gain medium having quantum fluctuations. This feature of the nonequilibrium steady state thereby distinguishes our proposed setup from previous experiments involving gain in classical systems [35][36][37][38][39], as well as the existing experiments in the quantum regime which do not feature a gain medium [60][61][62][63][64][65][66][67][68][69].…”
Section: B Loss-induced Lasing and Amplificationmentioning
confidence: 76%
“…(Note that in other setups loss-induced lasing can occur without any exceptional point [111].) This explicitly requires a gain medium and cannot be observed in the existing experiments in the quantum regime [60][61][62][63][64][65][66][67][68][69], none of which features a gain medium. The real and imaginary parts of the eigenvalues of H eff as a function of κ 2 are plotted in Fig.…”
Section: B Loss-induced Lasing and Amplificationmentioning
confidence: 99%
See 1 more Smart Citation
“…Each pair of laser beams {ω + , ω j } triggers a resonant two-photon Bragg transition to couple the momentum states |j ↔ |j + 1 . Following the treatment in [53,56], the full Hamiltonian under the interaction picture reads [57]…”
Section: Effective Tight-binding Hamiltonianmentioning
confidence: 99%
“…Theoretically, a wide range of non-Hermitian topological phases and phenomena have been classified and characterized according to their symmetries [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ] and dynamical signatures [ 18 , 19 , 20 , 21 , 22 , 23 ]. Experimentally, non-Hermitian topological matter have also been realized in cold atom [ 24 , 25 ], photonic [ 26 , 27 , 28 , 29 ], acoustic [ 30 , 31 , 32 ], electrical circuit [ 33 , 34 , 35 ] systems, and nitrogen-vacancy-center in diamond [ 36 ], leading to potential applications such as topological lasers [ 37 , 38 , 39 ] and high-performance sensors [ 40 , 41 , 42 , 43 ]. Additionally, non-Hermitian structures could also arise in supersymmetric quantum mechanics, where a series of supersymmetric models have been solved exactly [ 44 , 45 , 46 , 47 , 48 ].…”
Section: Introductionmentioning
confidence: 99%