Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Tommaso Guaita"'
Publikováno v:
Physical Review Research, Vol 3, Iss 2, p 023090 (2021)
We introduce families of pure quantum states that are constructed on top of the well-known Gilmore-Perelomov group-theoretic coherent states. We do this by constructing unitaries as the exponential of operators quadratic in Cartan subalgebra elements
Externí odkaz:
https://doaj.org/article/74d87d7f63664431acbeabcc3f813360
Publikováno v:
SciPost Physics, Vol 9, Iss 4, p 048 (2020)
We present a systematic geometric framework to study closed quantum systems based on suitably chosen variational families. For the purpose of (A) real time evolution, (B) excitation spectra, (C) spectral functions and (D) imaginary time evolution,
Externí odkaz:
https://doaj.org/article/99046348b207457bb931e73c815500ff
Publikováno v:
Physical Review Letters
Physical Review Letters, 129 (22)
Physical Review Letters, 129 (22)
We present an Ansatz for the ground states of the quantum Sherrington-Kirkpatrick model, a paradigmatic model for quantum spin glasses. Our Ansatz, based on the concept of generalized coherent states, very well captures the fundamental aspects of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54b3fe2fa69f9d59b9abddb65adbbc1d
Publikováno v:
Guaita, T, Hackl, L, Shi, T, Demler, E & Cirac, J I 2021, ' Generalization of group-theoretic coherent states for variational calculations ', Physical Review Research, vol. 3, no. 2, 023090 . https://doi.org/10.1103/PhysRevResearch.3.023090
Physical Review Research
Physical Review Research
We introduce new families of pure quantum states that are constructed on top of the well-known Gilmore-Perelomov group-theoretic coherent states. We do this by constructing unitaries as the exponential of operators quadratic in Cartan subalgebra elem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c7f81c0bf79c1575608e844e9e44e5d
https://doi.org/10.1103/physrevresearch.3.023090
https://doi.org/10.1103/physrevresearch.3.023090
Spontaneous collapse models are proposed modifications to quantum mechanics which aim to solve the measurement problem. In this article, we will consider models which attempt to extend a specific spontaneous collapse model, the Ghirardi-Rimini-Weber
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66335d2c4dff2662531a2f5d6de9159b
http://hdl.handle.net/11368/2988573
http://hdl.handle.net/11368/2988573
Publikováno v:
Physical Review B
We systematically extend Bogoliubov theory beyond the mean-field approximation of the Bose-Hubbard model in the superfluid phase. Our approach is based on the time-dependent variational principle applied to the family of all Gaussian states (i.e., Ga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::deb8a6b0f43f0659f3b99e4500ba297c
http://arxiv.org/abs/1907.04837
http://arxiv.org/abs/1907.04837
Publikováno v:
International Journal of Quantum Information
The quantum backflow effect is a counterintuitive behavior of the probability current of a free particle, which may be negative even for states with vanishing negative momentum component. Here we address the notion of nonclassicality arising from the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4f29c809c68248209cb5092e45c7777
http://arxiv.org/abs/1604.07141
http://arxiv.org/abs/1604.07141
Publikováno v:
Physical Review Letters
We consider free fermions living on lattices in arbitrary dimensions, where hopping amplitudes follow a power-law decay with respect to the distance. We focus on the regime where this power is larger than the spatial dimension (i.e., where the single
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25113c86c65b155dccf36eeae92e1afd