Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Marco Merkli"'
Publikováno v:
Quantum, Vol 8, p 1561 (2024)
A spin (qubit) is in contact with a bosonic reservoir. The state of the reservoir contains a parameter $\varepsilon$ interpolating between quantum and classical reservoir features. We derive the explicit expression for the time-dependent reduced spin
Externí odkaz:
https://doaj.org/article/c83c082d0df3471784cc49690e008af4
Publikováno v:
Quantum, Vol 8, p 1360 (2024)
Rigorous derivations of the approach of individual elements of large isolated systems to a state of thermal equilibrium, starting from arbitrary initial states, are exceedingly rare. This is particularly true for quantum mechanical systems. We demons
Externí odkaz:
https://doaj.org/article/f683851143ba4bc49f96a6b534f542f4
Autor:
Qin Huang, Marco Merkli
Publikováno v:
Physics Open, Vol 5, Iss , Pp 100043- (2020)
We study the evolution of a qubit evolving according to the Schrödinger equation with a Hamiltonian containing noise terms, modeled by random diagonal and off-diagonal matrix elements. We show that the noise-averaged qubit density matrix converges t
Externí odkaz:
https://doaj.org/article/a286e0d60e7141dc9d26d8b150903b21
Autor:
Marco Merkli
Publikováno v:
Quantum, Vol 6, p 615 (2022)
We develop a framework to analyze the dynamics of a finite-dimensional quantum system $\rm S$ in contact with a reservoir $\rm R$. The full, interacting $\rm SR$ dynamics is unitary. The reservoir has a stationary state but otherwise dissipative dyna
Externí odkaz:
https://doaj.org/article/299775fd22924573a1ea32a08b06d489
Autor:
Marco Merkli
Publikováno v:
Quantum, Vol 6, p 616 (2022)
A finite-dimensional quantum system is coupled to a bath of oscillators in thermal equilibrium at temperature $T \gt 0$. We show that for fixed, small values of the coupling constant $\lambda$, the true reduced dynamics of the system is approximated
Externí odkaz:
https://doaj.org/article/5eab8148e8604e1eb045391a34b36ad1
Autor:
Marco Merkli, Mark Penney
Publikováno v:
Mathematics, Vol 3, Iss 1, Pp 92-118 (2015)
We investigate the process of quantum measurements on scattered probes. Before scattering, the probes are independent, but they become entangled afterwards, due to the interaction with the scatterer. The collection of measurement results (the history
Externí odkaz:
https://doaj.org/article/b3218922c12241b9a83537e110917daa
Autor:
Alain Joye, Marco Merkli
Publikováno v:
Journal of Statistical Physics. 190
We consider a slowly varying time dependent d-level atom interacting with a photon field. Restricted to the single excitation atom-field sector, the model is a time-dependent generalization of the Wigner-Weisskopf model describing spontaneous emissio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9e15f7b58a223f1b5c0a7099658e4f9
https://doi.org/10.1007/s10955-023-03116-4
https://doi.org/10.1007/s10955-023-03116-4
Autor:
Marco Merkli
A finite quantum system S is coupled to a thermal, bosonic reservoir R. Initial SR states are possibly correlated, obtained by applying a quantum operation taken from a large class, to the uncoupled equilibrium state. We show that the full system-res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c94b1e6e82b67b1e2f1eac9d367ae47a
http://arxiv.org/abs/2107.02515
http://arxiv.org/abs/2107.02515
Autor:
Marco Merkli
Publikováno v:
Contemporary Mathematics. :323-338
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08acbbc768541fc1ad0c1e69635fb5a8
https://doi.org/10.1090/conm/717/14456
https://doi.org/10.1090/conm/717/14456
Autor:
Vladimir I. Tsifrinovich, Vyacheslav N. Gorshkov, Gennady P. Berman, Vladimir V. Tereshchuk, Marco Merkli
We consider a two-component dark matter halo (DMH) of a galaxy containing ultra-light axions (ULA) of different mass. The DMH is described as a Bose-Einstein condensate (BEC) in its ground state. In the mean-field (MF) limit we have derived the integ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f026167552c5646e1ebec1fea95b52d2
http://arxiv.org/abs/2001.10584
http://arxiv.org/abs/2001.10584