Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Grigori E Astrakharchik"'
Publikováno v:
New Journal of Physics, Vol 25, Iss 4, p 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:
https://doaj.org/article/075a6a1b9d834f7e97fa40128ed8353e
Publikováno v:
New Journal of Physics, Vol 19, Iss 12, p 125005 (2017)
We study a mixture of two superfluids with density–density and current–current (Andreev–Bashkin) interspecies interactions. The Andreev–Bashkin coupling gives rise to a dissipationless drag (or entrainment) between the two superfluids. Within
Externí odkaz:
https://doaj.org/article/530d128e10d144d4b9155c82a7cc44aa
Publikováno v:
SciPost Physics, Vol 13, Iss 2, p 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 pha
Externí odkaz:
https://doaj.org/article/647e1d4ba2a74291a1d2cc93e265919c
Publikováno v:
SciPost Physics, Vol 9, Iss 2, p 020 (2020)
We investigate the properties of self-bound ultradilute Bose-Bose mixtures, beyond the Lee-Huang-Yang description. Our approach is based on the determination of the beyond mean-field corrections to the phonon modes of the mixture in a self-consist
Externí odkaz:
https://doaj.org/article/fc636fb193eb4c1fa286e8dc200bbdf6
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Scientific Reports
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Scientific Reports
A halo is an intrinsically quantum object defined as a bound state of a spatial size which extends deeply into the classically forbidden region. Previously, halos have been observed in bound states of two and less frequently of three atoms. Here, we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f16a4663b2e241babcb97084d7369c03
https://doaj.org/article/5399e19af51146878db7f03fa94581d3
https://doaj.org/article/5399e19af51146878db7f03fa94581d3
Autor:
Jordi Martí, Ferran Mazzanti, Grigori E. Astrakharchik, Lluís Batet, Laura Portos-Amill, Borja Pedreño
Publikováno v:
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Materials; Volume 15; Issue 8; Pages: 2866
Universitat Politècnica de Catalunya (UPC)
Materials; Volume 15; Issue 8; Pages: 2866
Fusion energy stands out as a promising alternative for a future decarbonised energy system. In order to be sustainable, future fusion nuclear reactors will have to produce their own tritium. In the so-called breeding blanket of a reactor, the neutro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65a3596d421bf05c9a4abb1274858123
Publikováno v:
Crystals, Vol 8, Iss 6, p 246 (2018)
Ground-state properties of bosons interacting via inverse square potential (three dimensional Calogero-Sutherland model) are analyzed. A number of quantities scale with the density and can be naturally expressed in units of the Fermi energy and Fermi
Externí odkaz:
https://doaj.org/article/b51875db0add482abdcd082814ee32ca
Autor:
D. Deshommes, Maxim Olshanii, Grigori E. Astrakharchik, Jordi Torrents, Vanja Dunjko, Marina Gonchenko
Publikováno v:
SciPost Physics, Vol 10, Iss 5, p 114 (2021)
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
The recently proposed map [arXiv:2011.01415] between the hydrodynamic equations governing the two-dimensional triangular cold-bosonic breathers [Phys. Rev. X 9, 021035 (2019)] and the high-density zero-temperature triangular free-fermionic clouds, bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6e3ebe37e3147aa219458b041f9a5f1
https://scipost.org/SciPostPhys.10.5.114
https://scipost.org/SciPostPhys.10.5.114
Publikováno v:
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Universitat Politècnica de Catalunya (UPC)
Ensembles with long-range interactions between particles are promising for revealing strong quantum collective effects and many-body phenomena. Here we study the ground-state phase diagram of a two-dimensional Bose system with quadrupolar interaction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcb4da7ae692a5268e81a9cbcce1131d
https://hdl.handle.net/2117/353452
https://hdl.handle.net/2117/353452
Publikováno v:
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Universitat Politècnica de Catalunya (UPC)
We present an analytical method to estimate the condensate fraction $n_0/n$ in strongly correlated systems for which the zero-temperature static structure factor $S({\bf p})$ is known. The advantage of the proposed method is that it allows one to pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ce25b6259a76c0400df525208efb2a2
https://hdl.handle.net/2117/353451
https://hdl.handle.net/2117/353451