1. Non-equilibrium dynamics of an ultracold Bose gas under multi-pulsed interaction quenches.
- Author
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Chen, Lei, Zhang, Zhidong, and Liang, Zhaoxin
- Subjects
- *
BOSE-Einstein gas , *HAMILTONIAN systems , *QUANTUM gases , *TWO-body problem (Physics) , *SPIN excitations - Abstract
We investigate the non-equilibrium properties of a weakly interacting Bose gas subjected to a multi-pulsed quench at zero temperature, where the interaction parameter in the Hamiltonian system switches between values and for multiple times. The one-body and two-body correlation functions as well as Tan's contact are calculated. The quench induced excitations are shown to increase with the number of quenches for both and . This implies the possibility to use multi-pulsed quantum quench as a more powerful way as compared to the 'one-off' quench in controllable explorations of non-equilibrium quantum many-body systems. In addition, we study the ultra-short-range property of the two-body correlation function after multiple interaction quenches, which can serve as a probe of the 'Tan's contact' in the experiments. Our findings allow for an experimental probe using state of the art techniques with ultracold quantum gases. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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