Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Dennis Dast"'
Publikováno v:
Acta Polytechnica, Vol 54, Iss 2 (2014)
A Bose-Einstein condensate trapped in a double-well potential, where atoms are incoupled to one side and extracted from the other, can in the mean-field limit be described by the nonlinear Gross-Pitaevskii equation (GPE) with a PT symmetric external
Externí odkaz:
https://doaj.org/article/5e9d3655cb1a480e906e185229dbb32c
Publikováno v:
Acta Polytechnica, Vol 53, Iss 3 (2013)
We investigate the Gross-Pitaevskii equation for a Bose-Einstein condensate in a PT symmetric double-well potential by means of the time-dependent variational principle and numerically exact solutions. A one-dimensional and a fully three-dimensional
Externí odkaz:
https://doaj.org/article/b337e4f7f7dd435b93e02538ee02a6e1
Publikováno v:
Physical Review A. 100
It is shown that the distinct oscillations of the purity of the single-particle density matrix for many-body open quantum systems with balanced gain and loss reported by Dast et al. [Phys. Rev. A 93, 033617 (2016)] can also be found in closed quantum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10c02af8b08c6af7e4f56436d7b0aff1
https://doi.org/10.1103/physreva.100.063605
https://doi.org/10.1103/physreva.100.063605
Topological edge states in the Su-Schrieffer-Heeger model subject to balanced particle gain and loss
Publikováno v:
The European Physical Journal D. 72
We investigate the Su-Schrieffer-Heeger model in presence of an injection and removal of particles, introduced via a master equation in Lindblad form. It is shown that the dynamics of the density matrix follows the predictions of calculations in whic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c412a50af587469af7861cb1bf62e55b
https://doi.org/10.1140/epjd/e2018-90502-3
https://doi.org/10.1140/epjd/e2018-90502-3
Bose-Einstein condensates with balanced gain and loss in a double-well potential have been shown to exhibit PT-symmetric states. As proposed by Kreibich et al [Phys. Rev. A 87, 051601(R) (2013)], in the mean-field limit the dynamical behaviour of thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e0b537dc9e92fe5f8ddf0515bc1b653
http://arxiv.org/abs/1802.01323
http://arxiv.org/abs/1802.01323
Autor:
Jörg Main, Kirill Alpin, Johannes Reiff, Dennis Dast, Daniel Dizdarevic, Günter Wunner, Holger Cartarius
Publikováno v:
Physical Review A. 97
A quantum system exhibiting $\mathcal{PT}$ symmetry is a Bose-Einstein condensate in a double-well potential with balanced particle gain and loss, which is described in the mean-field limit by a Gross-Pitaevskii equation with a complex potential. A p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ff9dfb750dfe02a80efeccbe78bb329
https://doi.org/10.1103/physreva.97.013623
https://doi.org/10.1103/physreva.97.013623
Publikováno v:
International Journal of Theoretical Physics. 54:4100-4109
$\mathcal {P}\mathcal {T}$ -symmetric systems have been intensively studied in optical waveguides, where the $\mathcal {P}\mathcal {T}$ symmetry is achieved by pumping and absorption processes. In such systems the $\mathcal {P}\mathcal {T}$ symmetry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94d868b679ac0e642d41ddd323632eb9
https://doi.org/10.1007/s10773-014-2481-2
https://doi.org/10.1007/s10773-014-2481-2
PT-symmetric quantum mechanics allows finding stationary states in mean-field systems with balanced gain and loss of particles. In this work we apply this method to rotating Bose-Einstein condensates with contact interaction which are known to suppor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c297c70107b2bda2989506980529da32
http://arxiv.org/abs/1709.07213
http://arxiv.org/abs/1709.07213
Bose-Einstein condensates with balanced gain and loss can support stationary states despite the exchange of particles with the environment. In the mean-field approximation this is described by the PT-symmetric Gross-Pitaevskii equation with real eige
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94b1fac23a2a9f2f16f5e3fc93fe85b9
http://arxiv.org/abs/1705.10497
http://arxiv.org/abs/1705.10497
Publikováno v:
Physical Review A. 95
Non-Hermitian systems with $\mathcal{PT}$ symmetry can possess purely real eigenvalue spectra. In this work two one-dimensional systems with two different topological phases, the topological nontrivial phase (TNP) and the topological trivial phase (T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a1059da70bbaf0e775630dbe320ca2e
https://doi.org/10.1103/physreva.95.053626
https://doi.org/10.1103/physreva.95.053626