Towards an Atomtronic Diode

Daley, Andrew J.

doi:10.1103/physics.8.72

Cited by 6 publications

(5 citation statements)

References 25 publications

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“…For future work, there is much room to optimize barrier shapes and scattering length to boost tunneling asymmetry in order to steer the dynamics of a BEC; this is a natural and direct extension of efforts to optimize scattering length to control transmission [26]. This approach may enable atomtronic diodes [50], facilitate BEC driven interferometers [51], and gravimetry [52]. The analytic treatment in section 5 suggests at least three strategies for obtaining large tunneling asymmetry already in the weak-interaction regime: (a) large tunneling asymmetry may naturally be obtained when a relatively small number of quantum states participate in the dynamics, (b) tunneling asymmetry is enhanced when the tunneling rate, potential asymmetry, and BEC interaction strength are all comparable, in appropriate units, and (c) tunneling asymmetry is enhanced for fast, repeated tunneling back and forth through a barrier as compared to a slow single pass.…”

Section: Discussionmentioning

confidence: 99%

Asymmetric tunneling of Bose–Einstein condensates

Lindberg

Gaaloul

Kaplan

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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In his celebrated textbook, Quantum Mechanics: Nonrelativistic Theory, Landau argued that, for single particle systems in 1D, tunneling probability remains the same for a particle incident from the left or the right of a barrier. This left-right symmetry of tunneling probability holds regardless of the shape of the potential barrier. However, there are a variety of known cases that break this symmetry, e.g. when observing composite particles. We computationally (and analytically, in the simplest case) show this breaking of the left-right tunneling symmetry for Bose-Einstein condensates (BEC) in 1D, modeled by the Gross-Pitaevskii equation (GPE). By varying g, the parameter of inter-particle interaction in the BEC, we demonstrate that the transition from symmetric (g = 0) to asymmetric tunneling is a threshold phenomenon. Our computations employ experimentally feasible parameters such that these results may be experimentally demonstrated in the near future. We conclude by suggesting applications of the phenomena to design atomtronic diodes, synthetic gauge ﬁelds, Maxwell’s demons, and black-hole analogues.

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Section: Discussionmentioning

confidence: 99%

Asymmetric tunneling of Bose–Einstein condensates

Lindberg

Gaaloul

Kaplan

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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show abstract

“…There is much room to optimize barrier shapes and scattering length to boost asymmetry to steer dynamics of BEC, which is a direct expansion upon efforts to optimize scattering length to control transmission [24]. This may enable atomtronic diodes [40] and facilitate BEC driven interferometers [41].…”

Section: Discussionmentioning

confidence: 99%

Asymmetric Tunneling of Bose-Einstein Condensates

Lindberg¹,

Gaaloul²,

Williams³

et al. 2021

Preprint

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In his celebrated textbook, Quantum Mechanics-Nonrelativistic Theory, Landau argued that, for single particle systems in 1D, tunneling probability remains the same for a particle incident from the left or the right of a barrier. This left-right symmetry of tunneling probability holds regardless of the shape of the potential barrier. However, there are a variety of known cases which break this symmetry, e.g. when observing composite particles. First, we set about proving Landau's argument, as no rigorous proof currently exists. We then computationally show breaking of the left-right tunneling symmetry for the Bose-Einstein condensates (BEC) in 1D, modeled by the Gross-Pitaevskii equation. By varying the parameter, g, of inter-particle interaction in the BEC, we demonstrate the transition from symmetric (g = 0) to asymmetric tunneling is a threshold phenomenon. Our computations employ experimentally feasible parameters such that these results may be experimentally demonstrated in the near future. We conclude by suggesting applications of the phenomena to design atomtronic diodes, synthetic gauge fields, Maxwell's demons, and blackhole analogues.

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“…In the technique of atomtronics, atoms can be controlled and manipulated analogous to the operation in electronics [1][2][3][4][5][6][7][8][9]. One kind of devices in this field is atomic battery.…”

mentioning

confidence: 99%

Photovoltaic transistor of atoms due to spin-orbit coupling in three optical traps

Cui,

Zhang,

Lai

2021

Preprint

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In this paper, spin-orbit coupling induced photovoltaic effect of cold atoms has been studied in a three-trap system which is an two-dimensional extension of a two-trap system reported previously. It is proposed here that atom coherent length is one of the important influence to the resistance of this photovoltaic battery. Current properties of the system for different geometrical structures of the trapping potentials are discussed. Numerical results show extension in the number of traps could cause current increase directly. Quantum master equation at finite temperature is used to treat this opened system. This work may give a theoretical basis for further development of the photovoltaic effect of neutral atoms.

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Towards an Atomtronic Diode

Cited by 6 publications

References 25 publications

Asymmetric tunneling of Bose–Einstein condensates

Asymmetric tunneling of Bose–Einstein condensates

Asymmetric Tunneling of Bose-Einstein Condensates

Photovoltaic transistor of atoms due to spin-orbit coupling in three optical traps

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