Emergent Pauli blocking in a weakly interacting Bose gas

Cataldini, Federica; Møller, Frederik Trier; Tajik, Mohammadamin; Sabino, João; Schweigler, Thomas; Ji, Si-Cong; Mazets, I. E.; Rauer, Bernhard; Schmiedmayer, Jörg

doi:10.48550/arxiv.2111.13647

Cited by 3 publications

(8 citation statements)

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“…It would be interesting to investigate the effect of particle statistics on the two mechanisms studied here. Due to the boson-fermion correspondence in one spatial dimension the effective description of the experimental system can be expressed equivalently in terms of either bosonic or fermionic degrees of freedom and in fact the quasi-fermionic nature of excitations has been demonstrated in a recent experiment [62]. This suggests that, at least the canonical transmutation mechanism, where locality plays no role, should be relevant also in fermionic systems.…”

Section: Discussionmentioning

confidence: 99%

Mechanisms for the emergence of Gaussian correlations

et al. 2022

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We comprehensively investigate two distinct mechanisms leading to memory loss of non-Gaussian correlations after switching off the interactions in an isolated quantum system undergoing out-of-equilibrium dynamics. The first mechanism is based on spatial scrambling and results in the emergence of locally Gaussian steady states in large systems evolving over long times. The second mechanism, characterized as `canonical transmutation', is based on the mixing of a pair of canonically conjugate fields, one of which initially exhibits non-Gaussian fluctuations while the other is Gaussian and dominates the dynamics, resulting in the emergence of relative Gaussianity even at finite system sizes and times. We evaluate signatures of the occurrence of the two candidate mechanisms in a recent experiment that has observed Gaussification in an atom-chip controlled ultracold gas and elucidate evidence that it is canonical transmutation rather than spatial scrambling that is responsible for Gaussification in the experiment. Both mechanisms are shown to share the common feature that the Gaussian correlations revealed dynamically by the quench are already present though practically inaccessible at the initial time. On the way, we present novel observations based on the experimental data, demonstrating clustering of equilibrium correlations, analyzing the dynamics of full counting statistics, and utilizing tomographic reconstructions of quantum field states. Our work aims at providing an accessible presentation of the potential of atom-chip experiments to explore fundamental aspects of quantum field theories in quantum simulations.

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Section: Discussionmentioning

confidence: 99%

Mechanisms for the emergence of Gaussian correlations

et al. 2022

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“…An example of this can be found in Ref. [27], where GHD was employed to describe the relaxation of a single excited density mode. Although the excited mode was well-defined in k-space, its corresponding rapidity distribution spanned over a range of rapidities by virtue of finite temperature.…”

Section: Pairs (K −mentioning

confidence: 99%

“…For comparison, in Ref. [27] the observed dynamics was fitted with damping exponents scaling with ∝ k 3/2 j , t 3/2 . However, from GHD simulations the exact power was found to be slightly temperature dependent, with lower temperature realizations tending towards quadratic scaling.…”

Section: Pairs (K −mentioning

confidence: 99%

“…Although GHD has been demonstrated to accurately describe the dynamics of 1D cold gas experiments [24][25][26][27], the theory suffers from a few significant limitations: Firstly, the quasi-particle distributions enable computation of local expectation values but do not provide information on the fluctuations. Secondly, the assumption of locality results in all spatially separated, equal-time connected correlations to vanish [28,29].…”

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confidence: 99%

“…For the demonstration, we study the setup of a thermal state with a single, coherently excited density mode, inspired by recent experimental protocols [27]. We employ periodic boundary conditions and sample boostons for the 40 lowest momentum modes, whose thermal populations follow the Bose-Einstein distribution.…”

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New trends in quantum integrability: recent experiments with ultracold atoms

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Over the past two decades quantum engineering has made significant advances in our ability to create genuine quantum many-body systems using ultracold atoms. In particular, some prototypical exactly solvable Yang-Baxter systems have been successfully realized allowing us to confront elegant and sophisticated exact solutions of these systems with their experimental counterparts. The new experimental developments show a variety of fundamental one-dimensional (1D) phenomena, ranging from the generalized hydrodynamics to dynamical fermionization, Tomonaga-Luttinger liquids, collective excitations, fractional exclusion statistics, quantum holonomy, spin-charge separation, competing orders with high spin symmetry and quantum impurity problems. This article briefly reviews these developments and provides rigorous understanding of those observed phenomena based on the exact solutions while highlighting the uniqueness of 1D quantum physics. The precision of atomic physics realizations of integrable many-body problems continues to inspire significant developments in mathematics and physics while at the same time offering the prospect to contribute to future quantum technology.

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Emergent Pauli blocking in a weakly interacting Bose gas

Cited by 3 publications

References 40 publications

Mechanisms for the emergence of Gaussian correlations

Mechanisms for the emergence of Gaussian correlations

Bridging Effective Field Theories and Generalized Hydrodynamics

New trends in quantum integrability: recent experiments with ultracold atoms

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