| Autor: |
Wei Wang (王 巍), Vittorio Penna, Barbara Capogrosso-Sansone |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
New Journal of Physics, Vol 18, Iss 6, p 063002 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
1367-2630 |
| DOI: |
10.1088/1367-2630/18/6/063002 |
| Popis: |
In the present work we discuss inter-species entanglement in Bose–Bose mixtures trapped in optical lattices. This work is motivated by the observation that, in the presence of a second component, the MI lobe shifts differently on the hole- and particle-side with respect to the Mott lobe of the single species system (Guglielmino et al 2010 Phys. Rev. A http://dx.doi.org/10.1103/PhysRevA.82.021601 82 http://dx.doi.org/10.1103/PhysRevA.82.021601 ; Capogrosso-Sansone et al 2011 Laser Phys. http://dx.doi.org/10.1134/s1054660x11150023 21 http://dx.doi.org/10.1134/s1054660x11150023 ). We use perturbation theory, formulated in a Hilbert space decomposed by means of lattice symmetries, in order to show that the nonuniform shift of the Mott lobe is a manifestation of inter-species entanglement which differs in the lowest excited states to remove and add a particle. Our results indicate that inter-species entanglement in mixtures can provide a new perspective in understanding quantum phase transitions. To validate our approach, we compare our results from perturbation theory with quantum Monte Carlo simulations. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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