Atomic boson sampling in a Bose-Einstein-condensed gas

VV Kocharovsky, VV Kocharovsky, SV Tarasov - Physical Review A, 2022 - APS
We consider quantum statistical physics of many-body equilibrium fluctuations in an
interacting Bose-Einstein-condensed (BEC) gas. We find a universal analytic formula for a …

Multi-Qubit Bose–Einstein Condensate Trap for Atomic Boson Sampling

S Tarasov, W Shannon, V Kocharovsky, V Kocharovsky - Entropy, 2022 - mdpi.com
We propose a multi-qubit Bose–Einstein-condensate (BEC) trap as a platform for studies of
quantum statistical phenomena in many-body interacting systems. In particular, it could …

Bose-Einstein-condensate fluctuations versus an interparticle interaction

SV Tarasov, VV Kocharovsky, VV Kocharovsky - Physical Review A, 2020 - APS
We calculate the Bose-Einstein-condensate (BEC) occupation statistics vs the interparticle
interaction in a dilute gas with a nonuniform condensate in a box trap within the Bogoliubov …

Ensemble nonequivalence and Bose–Einstein condensation in weighted networks

Q Zhang, D Garlaschelli - Chaos, Solitons & Fractals, 2023 - Elsevier
The asymptotic (non) equivalence of canonical and microcanonical ensembles, describing
systems with soft and hard constraints respectively, is a central concept in statistical physics …

Anomalous statistics of Bose-Einstein condensate in an interacting gas: An effect of the trap's form and boundary conditions in the thermodynamic limit

S Tarasov, V Kocharovsky, V Kocharovsky - Entropy, 2018 - mdpi.com
We analytically calculate the statistics of Bose-Einstein condensate (BEC) fluctuations in an
interacting gas trapped in a three-dimensional cubic or rectangular box with the Dirichlet …

Grand-canonical condensate fluctuations in weakly interacting Bose-Einstein condensates of light

C Weiss, J Tempere - Physical Review E, 2016 - APS
Grand-canonical fluctuations of Bose-Einstein condensates of light are accessible to state-of-
the-art experiments [J. Schmitt, Phys. Rev. Lett. 112, 030401 (2014). PRLTAO 0031-9007 …

Visualizing quantum entanglement in Bose-Einstein condensates without state vectors

RB Thompson - International Journal of Theoretical Physics, 2025 - Springer
Ring polymer self-consistent field theory is used to calculate the critical temperatures and
heat capacities of an ideal Bose gas for an order of magnitude more particles than …

Continuum of classical-field ensembles in Bose gases from canonical to grand canonical and the onset of their equivalence

J Pietraszewicz, E Witkowska, P Deuar - Physical Review A, 2017 - APS
The canonical and grand-canonical ensembles are two usual marginal cases for ultracold
Bose gases, but real collections of experimental runs commonly have intermediate …

[PDF][PDF] Statistical physics and information theory for systems with local constraints

Q Zhang - 2021 - scholarlypublications …
Statistical physics is built to explain the macroscopic properties in physical systems from the
probabilistic examination of underlying microscopic configurations [1]. As the initial research …

Bose–Einstein condensation in mesoscopic systems: The self-similar structure of the critical region and the nonequivalence of the canonical and grand canonical …

VV Kocharovsky, VV Kocharovsky, SV Tarasov - JETP letters, 2016 - Springer
The analytical theory of Bose–Einstein condensation of an ideal gas in mesoscopic systems
has been briefly reviewed in application to traps with arbitrary shapes and dimension. This …