Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Petrov D S"'
Autor:
Givois, J., Petrov, D. S.
Publikováno v:
Few-Body Syst. 65, 80 (2024)
By developing the mean-field theory valid for large $N$, we investigate the problem of two light fermions interacting via a zero-range potential with $N$ heavy fermions in two dimensions. We obtain numerical evidence that this system is never fully b
Externí odkaz:
http://arxiv.org/abs/2405.04035
Autor:
Petrov, D. S.
The discovery of ultracold dilute liquids has significantly elevated our interest in various phenomena which go under the name of beyond-mean-field (BMF) physics. In these lecture notes we give an elementary introduction to the quantum stabilization
Externí odkaz:
http://arxiv.org/abs/2312.05336
Publikováno v:
AVS Quantum Sci. 6, 023201 (2024)
We investigate the ground state properties of $N$ bosons with attractive zero-range interactions characterized by the scattering length $a>0$ and confined to the surface of a sphere of radius $R$. We present the analytic solution of the problem for $
Externí odkaz:
http://arxiv.org/abs/2312.04984
Publikováno v:
SciPost Phys. 17, 050 (2024)
We study binding of $N$ identical heavy fermions by a light atom in two dimensions assuming zero-range attractive heavy-light interactions. By using the mean-field theory valid for large $N$ we show that the $N+1$ cluster is bound when the mass ratio
Externí odkaz:
http://arxiv.org/abs/2310.11330
Publikováno v:
SciPost Phys. 14, 091 (2023)
For sufficiently large mass ratios the attractive exchange force caused by a single light atom interacting with a few heavy identical fermions can overcome their Fermi degeneracy pressure and bind them into an $N+1$ cluster. Here, by using a mean-fie
Externí odkaz:
http://arxiv.org/abs/2207.04742
Publikováno v:
Phys. Rev. A 106, L011302 (2022)
We consider the problem of $N$ identical fermions interacting via a zero-range attractive potential with a lighter atom in one dimension. Using the few-body approach based on the Skorniakov and Ter-Martirosian equation, we determine the energies and
Externí odkaz:
http://arxiv.org/abs/2205.01018
Autor:
Pricoupenko, A., Petrov, D. S.
Publikováno v:
Phys. Rev. A 103, 033326 (2021)
We develop the perturbation theory for bosons interacting via a two-body potential $V$ of vanishing mean value. We find that the leading nonpairwise contribution to the energy emerges in the third order in $V$ and represents an effective three-body i
Externí odkaz:
http://arxiv.org/abs/2012.10429
Autor:
Naidon, P., Petrov, D. S.
Publikováno v:
Phys. Rev. Lett. 126, 115301 (2021)
Repulsive Bose-Bose mixtures are known to either mix or phase-separate into pure components. Here we predict a mixed-bubble regime in which bubbles of the mixed phase coexist with a pure phase of one of the components. This is a beyond-mean-field eff
Externí odkaz:
http://arxiv.org/abs/2008.05870
Publikováno v:
Phys. Rev. A 101, 041602 (2020)
We study clusters of the type A$_N$B$_M$ with $N\leq M\leq 3$ in a two-dimensional mixture of A and B bosons, with attractive AB and equally repulsive AA and BB interactions. In order to check universal aspects of the problem, we choose two very diff
Externí odkaz:
http://arxiv.org/abs/1911.01701
Autor:
Pricoupenko, A., Petrov, D. S.
Publikováno v:
Phys. Rev. A 100, 042707 (2019)
We calculate the effective three-body force for bosons interacting with each other by a two-body potential tuned to a narrow zero crossing in any dimension. We use the standard two-channel model parametrized by the background atom-atom interaction st
Externí odkaz:
http://arxiv.org/abs/1907.02236