K
Krzysztof Sacha
Researcher at Jagiellonian University
Publications - 168
Citations - 3545
Krzysztof Sacha is an academic researcher from Jagiellonian University. The author has contributed to research in topics: Anderson localization & Bose–Einstein condensate. The author has an hindex of 28, co-authored 153 publications receiving 2827 citations. Previous affiliations of Krzysztof Sacha include Los Alamos National Laboratory & University of Marburg.
Papers
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Time crystals: a review
Krzysztof Sacha,Jakub Zakrzewski +1 more
TL;DR: The struggle to observe discrete time crystals is reviewed here together with propositions that generalize this concept introducing condensed matter like physics in the time domain.
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Modeling spontaneous breaking of time-translation symmetry
TL;DR: In this article, an ultracold atomic cloud bouncing on an oscillating mirror can reveal spontaneous breaking of a discrete time-translation symmetry, which can be induced by atomic losses or by a measurement of particle positions.
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Routes towards Anderson-like localization of Bose-Einstein condensates in disordered optical lattices.
T. Schulte,S. Drenkelforth,J. Kruse,Wolfgang Ertmer,Jan J. Arlt,Krzysztof Sacha,Jakub Zakrzewski,Maciej Lewenstein +7 more
TL;DR: Analysis of possible routes towards Anderson-like localization of Bose-Einstein condensates in disordered potentials shows that incommensurable superlattices should allow for the observation of the crossover from the nonlinear screening regime to the Anderson localized case within realistic experimental parameters.
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Symphony on strong field approximation
Kasra Amini,Kasra Amini,Jens Biegert,Francesca Calegari,Alexis Chacón,Marcelo F. Ciappina,Alexandre Dauphin,Dmitry K. Efimov,Carla Figueira de Morisson Faria,Krzysztof Giergiel,Piotr Gniewek,Alexandra S. Landsman,Alexandra S. Landsman,Michał Lesiuk,Michał Mandrysz,A. S. Maxwell,Robert Moszynski,Lisa Ortmann,Jose Antonio Pérez-Hernández,Antonio Picón,Antonio Picón,Emilio Pisanty,Jakub S. Prauzner-Bechcicki,Krzysztof Sacha,Noslen Suarez,Amelle Zaïr,Jakub Zakrzewski,Maciej Lewenstein +27 more
TL;DR: The Strong Field Approximation (SFA) as mentioned in this paper is a method to solve the TDSE, in which the nonperturbative interactions are described by including continuum-continuum interactions in a systematic perturbation-like theory.
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Self-localized impurities embedded in a one-dimensional Bose-Einstein condensate and their quantum fluctuations
TL;DR: In this article, the self-localization of neutral impurity atoms in a Bose-Einstein condensate in a one-dimensional model is considered and the authors present a Bogoliubov-de Gennes formalism to describe quantum fluctuations around the product state of the strong coupling description.