Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Jorg Main"'
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:
Machine Learning: Science and Technology, Vol 5, Iss 1, p 015045 (2024)
Resonances in open quantum systems depending on at least two controllable parameters can show the phenomenon of exceptional points (EPs), where not only the eigenvalues but also the eigenvectors of two or more resonances coalesce. Their exact localiz
Externí odkaz:
https://doaj.org/article/ff7a36862b7b4606a33228b431f95f85
SIMPLE MODELS OF THREE COUPLED PT -SYMMETRIC WAVE GUIDES ALLOWING FOR THIRD-ORDER EXCEPTIONAL POINTS
Publikováno v:
Acta Polytechnica, Vol 57, Iss 6, Pp 454-461 (2017)
We study theoretical models of three coupled wave guides with a PT-symmetric distribution of gain and loss. A realistic matrix model is developed in terms of a three-mode expansion. By comparing with a previously postulated matrix model it is shown h
Externí odkaz:
https://doaj.org/article/4ce4fa4b105645348d44c7e94ee9503d
Publikováno v:
Acta Polytechnica, Vol 57, Iss 6, Pp 470-476 (2017)
We numerically investigate topological phases of periodic lattice systems in tight-binding description under the influence of dissipation. The effects of dissipation are effectively described by PT-symmetric potentials. In this framework we develop a
Externí odkaz:
https://doaj.org/article/48d2fb62b968417d860fbf1560314b25
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