Zobrazeno 1 - 3
of 3
pro vyhledávání: '"Fabio Caleffi"'
Publikováno v:
New Journal of Physics, Vol 23, Iss 3, p 033018 (2021)
We study the dynamics of a two-level impurity embedded in a two-dimensional Bose–Hubbard (BH) model at zero temperature from an open quantum system perspective. Results for the decoherence across the whole phase diagram are presented, with a focus
Externí odkaz:
https://doaj.org/article/fff1c3b4e8dc4cfb886f6cc12038acca
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033276 (2020)
We develop a quantum many-body theory of the Bose-Hubbard model based on the canonical quantization of the action derived from a Gutzwiller mean-field ansatz. Our theory is a systematic generalization of the Bogoliubov theory of weakly interacting ga
Externí odkaz:
https://doaj.org/article/e7510939d42a4d20aca01834a612d36c
Publikováno v:
SciPost Physics, Vol 12, Iss 3, p 111 (2022)
We study the effects of quantum fluctuations in the two-component Bose-Hubbard model generalizing to mixtures the quantum Gutzwiller approach introduced recently in [Phys. Rev. Research 2, 033276 (2020)]. As a basis for our study, we analyze the m
Externí odkaz:
https://doaj.org/article/2e4af6b7bccf484fb4969bfe56fb4adb