Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Valentin Link"'
Publikováno v:
New Journal of Physics, Vol 26, Iss 10, p 103021 (2024)
We provide a new perspective on quantum dynamical phase transitions (DPTs) by explaining their origin in terms of caustics that form in the Fock space representation of the many-body state over time, using the fully connected transverse field Ising m
Externí odkaz:
https://doaj.org/article/3e01ffdb4a224e6bb51efc5a5abda375
Publikováno v:
New Journal of Physics, Vol 25, Iss 9, p 093006 (2023)
We introduce an exact open system method to describe the dynamics of quantum systems that are strongly coupled to specific types of environments comprising of spins, such as central spin systems. Our theory is similar to the established non-Markovian
Externí odkaz:
https://doaj.org/article/96cf704e00b0488d8cf4057048d115c9
Autor:
Valentin Link, Kai Müller, Rosaria G. Lena, Kimmo Luoma, François Damanet, Walter T. Strunz, Andrew J. Daley
Publikováno v:
PRX Quantum, Vol 3, Iss 2, p 020348 (2022)
An important challenge in non-Markovian open quantum systems is to understand what information we gain from continuous measurement of an output field. For example, atoms in multimode cavity QED systems provide an exciting platform to study many-body
Externí odkaz:
https://doaj.org/article/cbc694821cad4625a6945610074f6eeb
Publikováno v:
Entropy, Vol 24, Iss 3, p 352 (2022)
We study non-Markovian dynamics of an open quantum system system interacting with a nonstationary squeezed bosonic reservoir. We derive exact and approximate descriptions for the open system dynamics. Focusing on the spin boson model, we compare exac
Externí odkaz:
https://doaj.org/article/cf73b42e8e2e451598b3c8347137b200
Publikováno v:
Entropy; Volume 24; Issue 3; Pages: 352
We study non-Markovian dynamics of an open quantum system system interacting with a nonstationary squeezed bosonic reservoir. We derive exact and approximate descriptions for the open system dynamics. Focusing on the spin boson model, we compare exac
Autor:
Valentin Link, Kai Müller, Rosaria G. Lena, Kimmo Luoma, François Damanet, Walter T. Strunz, Andrew J. Daley
An important challenge in non-Markovian open quantum systems is to understand what information we gain from continuous measurement of an output field. For example, atoms in multimode cavity QED systems provide an exciting platform to study many-body
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6083e6ac83b9b2a257e9e8be78abf4b
Autor:
Walter T. Strunz, Valentin Link
We study dynamical phase transitions (DPT) in the driven and damped Dicke model, realizable for example by a driven atomic ensemble collectively coupled to a damped cavity mode. These DPTs are characterized by non-analyticities of certain observables
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::724fc3a1fda3cbc5aba13c4a90491f41
http://arxiv.org/abs/2005.10013
http://arxiv.org/abs/2005.10013
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 54:035303
In this article we investigate driven dissipative quantum dynamics of an ensemble of two-level systems given by a Markovian master equation with collective and non-collective dissipators. Exploiting the permutation symmetry in our model, we employ a
We investigate different geometries and invariant measures on the space of mixed Gaussian quan- tum states. We show that when the global purity of the state is held fixed, these measures coincide and it is possible, within this constraint, to define
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::558203923b9e01b26603f054510a68ee
http://arxiv.org/abs/1808.10153
http://arxiv.org/abs/1808.10153
A damped and driven collective spin system is analyzed by using quantum state diffusion. This approach allows for a mostly analytical treatment of the investigated non-equilibrium quantum many body dynamics, which features a phase transition in the t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e33fe97f07d90a9ca8a0199116da2dc0