Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Thomas Gasenzer"'
Autor:
Markus Karl, Thomas Gasenzer
Publikováno v:
New Journal of Physics, Vol 19, Iss 9, p 093014 (2017)
Universal scaling behavior in the relaxation dynamics of an isolated two-dimensional Bose gas is studied by means of semi-classical stochastic simulations of the Gross–Pitaevskii model. The system is quenched far out of equilibrium by imprinting vo
Externí odkaz:
https://doaj.org/article/ce1721d966804f368ecdbb4f5e441b06
Publikováno v:
New Journal of Physics, Vol 18, Iss 4, p 045010 (2016)
We use the coordinate Bethe ansatz to exactly calculate matrix elements between eigenstates of the Lieb–Liniger model of one-dimensional bosons interacting via a two-body delta-potential. We investigate the static correlation functions of the zero-
Externí odkaz:
https://doaj.org/article/aad6550e9b514eb4b6944fb8506cf59b
Publikováno v:
New Journal of Physics, Vol 16, Iss 9, p 093052 (2014)
It is demonstrated how a many-body system far from thermal equilibrium can exhibit universal dynamics in passing a nonthermal fixed point. As an example, the process of Bose–Einstein (BE) condensation of a dilute cold gas is considered. If the part
Externí odkaz:
https://doaj.org/article/7cb1fb80934e401d99df187889517d8e
Publikováno v:
SciPost Physics, Vol 12, Iss 1, p 039 (2022)
The approximation of quantum states with artificial neural networks has gained a lot of attention during the last years. Meanwhile, analog neuromorphic chips, inspired by structural and dynamical properties of the biological brain, show a high ene
Externí odkaz:
https://doaj.org/article/5c575864318b484b81fb2a2ea562ff81
Publikováno v:
SciPost Physics, Vol 8, Iss 4, p 058 (2020)
We conjecture that, in a renormalizable effective quantum field theory where the heaviest stable particle has mass $m$, there are no bound states with radius below $1/m$ (Bound State Conjecture). We are motivated by the (scalar) Weak Gravity Conje
Externí odkaz:
https://doaj.org/article/210d83f164d44054a1a2c23e3563fe94
Autor:
Philipp Heinen, Thomas Gasenzer
Quantitative numerical analyses of interacting dilute Bose-Einstein condensates are most often based on semi-classical approximations. Since the complex-valued field-theoretic action of the Bose gas does not offer itself to the direct application of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96ef00a5b064f3c9468f9403ac9f0a58
http://arxiv.org/abs/2204.10661
http://arxiv.org/abs/2204.10661
Publikováno v:
Physical Review E. 105
Path integrals with complex actions are encountered for many physical systems ranging from spin- or mass-imbalanced atomic gases and graphene to quantum chromodynamics at finite density to the nonequilibrium evolution of quantum systems. Many computa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::451efa23f56416c82b4bbed4c13f120b
https://doi.org/10.1103/physreve.105.045315
https://doi.org/10.1103/physreve.105.045315
We extend the theory of non-thermal fixed points to the case of anomalously slow universal scaling dynamics according to the sine-Gordon model. This entails the derivation of a kinetic equation for the momentum occupancy of the scalar field from a no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af80375fa57568bacc0bdfc8fb70d2eb
Publikováno v:
SciPost Physics, Vol 4, Iss 2, p 011 (2018)
We use the coordinate Bethe ansatz to study the Lieb-Liniger model of a one-dimensional gas of bosons on a finite-sized ring interacting via an attractive delta-function potential. We calculate zero-temperature correlation functions for seven part
Externí odkaz:
https://doaj.org/article/63cc3dbcddb0463fb1a9080467df5e39
Publikováno v:
Physical Review Letters
Physical review letters 127(10), 101601 (2021). doi:10.1103/PhysRevLett.127.101601
Physical review letters 127(10), 101601 (2021). doi:10.1103/PhysRevLett.127.101601
Holographic duality provides a description of strongly coupled quantum systems in terms of weakly coupled gravitational theories in a higher-dimensional space. It is a challenge, however, to quantitatively determine the physical parameters of the qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4f7c29f6c07e583cfb1e9b069d76af1