Quantum Emulation of Extreme Non‐Equilibrium Phenomena with Trapped Atoms

Rajagopal, Shankari; Fujiwara, Kurt; Senaratne, Ruwan; Singh, Kevin; Geiger, Zachary; Weld, David

doi:10.1002/andp.201700008

Cited by 16 publications

(10 citation statements)

References 69 publications

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“…Interestingly, the enhancement of interactions through Feshbach resonances is not necessary to observe the dynamical stabilization phenomenon. We note that Kapitza stabilization of cold atoms in optical lattices starts to attract the interest of experimental groups [21].…”

Section: Proposed Experimental Realizationmentioning

confidence: 95%

Kapitza stabilization of a repulsive Bose-Einstein condensate in an oscillating optical lattice

et al. 2018

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We show that the Kapitza stabilization can occur in the context of nonlinear quantum fields. Through this phenomenon, an amplitude-modulated lattice can stabilize a Bose-Einstein condensate with repulsive interactions and prevent the spreading for long times. We present a classical and quantum analysis in the framework of Gross-Pitaevskii equation, specifying the parameter region where stabilization occurs. Effects of nonlinearity lead to a significant increase of the stability domain compared with the classical case. Our proposal can be experimentally implemented with current cold atom settings. arXiv:1709.07792v3 [cond-mat.quant-gas]

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Section: Proposed Experimental Realizationmentioning

confidence: 95%

Kapitza stabilization of a repulsive Bose-Einstein condensate in an oscillating optical lattice

et al. 2018

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“…In this light, colliding ultracold atoms could be used to mimic electrons during atom-atom collisions. Since the dynamics of ultracold atoms take place on much larger time scales, the usually very fast electronic processes could be slowed down [29,46,47], potentially providing in depth insights into the fundamental processes of atom-atom or atom-ion collisions such as projectile ionization [48,49] or charge transfer [50,51].…”

Section: Introductionmentioning

confidence: 99%

Bosonic Quantum Dynamics Following Colliding Potential Wells

Köhler,

Schmelcher

2021

Preprint

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We employ the multi-configuration time-dependent Hartree method for bosons (MCTDHB) in order to investigate the correlated non-equilibrium quantum dynamics of two bosons confined in two colliding and uniformly accelerated Gaussian wells. As the wells approach each other an effective, transient double-well structure is formed. This induces a transient and oscillatory overbarrier transport. We monitor both the amplitude of the intra-well dipole mode in the course of the dynamics as well as the final distribution of the particles between the two wells. For fast collisions we observe an emission process which we attribute to two distinct mechanisms. Energy transfer processes lead to an untrapped fraction of bosons and a resonant enhancement of the deconfinement for certain kinematic configurations can be observed. Despite the comparatively weak interaction strengths employed in this work, we identify strong inter-particle correlations by analyzing the corresponding Von Neumann entropy.

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“…The study of ultrafast-equivalent electronic and vibrational dynamics is a natural but largely unexplored application of cold-atom quantum simulation techniques [1][2][3][4][5]. Quantum simulation experiments often rely on an analogy between trapped neutral atoms and electrons in matter [6][7][8].…”

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confidence: 99%

“…Collective excitations in Bose condensates were a major focus of early experimental and theoretical research [21][22][23][24][25][26], and the analogy between degenerate trapped gases and individual atoms was noted at that time [1,27,28]. Ultrafast probes have recently been used to study many-body dynamics in Rydberg atoms [29], and recent theoretical proposals have suggested the use of cold atoms to simulate ultrafast dynamics in atoms [2,5], molecules [4], and solids [3].…”

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confidence: 99%

Quantum simulation of ultrafast dynamics using trapped ultracold atoms

et al. 2018

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Ultrafast electronic dynamics are typically studied using pulsed lasers. Here we demonstrate a complementary experimental approach: quantum simulation of ultrafast dynamics using trapped ultracold atoms. Counter-intuitively, this technique emulates some of the fastest processes in atomic physics with some of the slowest, leading to a temporal magnification factor of up to 12 orders of magnitude. In these experiments, time-varying forces on neutral atoms in the ground state of a tunable optical trap emulate the electric fields of a pulsed laser acting on bound charged particles. We demonstrate the correspondence with ultrafast science by a sequence of experiments: nonlinear spectroscopy of a many-body bound state, control of the excitation spectrum by potential shaping, observation of sub-cycle unbinding dynamics during strong few-cycle pulses, and direct measurement of carrier-envelope phase dependence of the response to an ultrafast-equivalent pulse. These results establish cold-atom quantum simulation as a complementary tool for studying ultrafast dynamics.

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Quantum Emulation of Extreme Non‐Equilibrium Phenomena with Trapped Atoms

Cited by 16 publications

References 69 publications

Kapitza stabilization of a repulsive Bose-Einstein condensate in an oscillating optical lattice

Kapitza stabilization of a repulsive Bose-Einstein condensate in an oscillating optical lattice

Bosonic Quantum Dynamics Following Colliding Potential Wells

Quantum simulation of ultrafast dynamics using trapped ultracold atoms

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