Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Astrakharchik, Grigori"'
We introduce an alternative expression for the ground state wave function of the fermionic Tonks-Girardeau gas. Our wave function is constructed based on the occupation numbers and natural orbitals of the one-body density matrix. We demonstrate that
Externí odkaz:
http://arxiv.org/abs/2407.13270
Publikováno v:
Phys. Rev. A 110, 033303 (2024)
We study the Josephson junction made of a one-dimensional ultradilute quantum liquid in a double-well potential. We analyze the dynamics as a function of the interaction strength and compare the results to the standard bosonic Josephson junction. It
Externí odkaz:
http://arxiv.org/abs/2406.05292
The superfluid fraction $f$ of a quantum fluid is defined in terms of the response of the system to a weak and constant drag. Notably, Leggett long ago derived two simple expressions providing a rigorous upper bound and a heuristic lower bound for $f
Externí odkaz:
http://arxiv.org/abs/2403.08416
Publikováno v:
Phys. Rev. A 110, 023310 (2024)
We consider the problem of unitary Bose polarons, i.e., impurities interacting via a potential with infinite scattering length with a bath of weakly interacting bosons. We provide an analytic expression for the energy of a heavy impurity whose intera
Externí odkaz:
http://arxiv.org/abs/2311.14313
Publikováno v:
Phys. Rev. Lett. 132, 193401 (2024)
Attractive $p$-wave one-dimensional fermions are studied in the fermionic Tonks-Girardeau regime in which the diagonal properties are shared with those of an ideal Bose gas. We study the off-diagonal properties and present analytical expressions for
Externí odkaz:
http://arxiv.org/abs/2309.03606
Publikováno v:
SciPost Phys. 16, 074 (2024)
We study the formation of particle-imbalanced quantum droplets in a one-dimensional optical lattice containing a binary bosonic mixture at zero temperature. To understand the effects of the imbalance from both the few- and many-body perspectives, we
Externí odkaz:
http://arxiv.org/abs/2306.12283
Publikováno v:
Phys. Rev. A 109, L031302 (2024)
We study the thermal behavior of correlations in a one-dimensional Bose gas with tunable interaction strength, crossing from weakly-repulsive to Tonks-Girardeau regime. A reference temperature in this system is that of the hole anomaly, observed as a
Externí odkaz:
http://arxiv.org/abs/2302.03509
Publikováno v:
New J. Phys. 25 043002 (2023)
We present a comprehensive study shedding light on how thermal fluctuations affect correlations in a Bose gas with contact repulsive interactions in one spatial dimension. The pair correlation function, the static structure factor, and the one-body d
Externí odkaz:
http://arxiv.org/abs/2301.07626
Publikováno v:
Phys. Rev. Lett. 130, 023602 (2023)
We propose a mechanism for liquid formation in strongly correlated lattice systems. The mechanism is based on an interplay between long-range attraction and superexchange processes. As an example, we study dipolar bosons in one-dimensional optical la
Externí odkaz:
http://arxiv.org/abs/2204.03906
Publikováno v:
SciPost Phys. 13, 035 (2022)
We reveal an intriguing anomaly in the temperature dependence of the specific heat of a one-dimensional Bose gas. The observed peak holds for arbitrary interaction and remembers a superfluid-to-normal phase transition in higher dimensions, but phase
Externí odkaz:
http://arxiv.org/abs/2104.12651