Probing two-particle exchange processes in two-mode Bose-Einstein condensates
| Autor: | D. Sahagun, Luis Benet, Diego Espitia |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics FOS: Physical sciences Function (mathematics) Fock space law.invention Quantum Gases (cond-mat.quant-gas) law Quantum mechanics Coherent states Gravitational singularity Condensed Matter - Quantum Gases Feshbach resonance Scaling Bose–Einstein condensate Quantum tunnelling |
| Zdroj: | Physical Review A. 95 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.95.033624 |
| Popis: | We study the fidelity decay and its freeze for an initial coherent state of two-mode Bose-Einstein condensates in the Fock regime considering a Bose-Hubbard model that includes two-particle tunneling terms. By using linear-response theory we find scaling properties of the fidelity as a function of the particle number that prove the existence of two-particle mode exchange when a nondegeneracy condition is fulfilled. Tuning the energy difference of the two modes serves to distinguish the presence of two-particle mode-exchange terms through the appearance of certain singularities. We present numerical calculations that illustrate our findings, and propose exploiting a Feshbach resonance to verify experimentally our predictions. |
| Databáze: | OpenAIRE |
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