Journal
NEW JOURNAL OF PHYSICS
Volume 18, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/18/6/063002
Keywords
inter-species; entanglement; Bose-Bose mixture; Mott-insulator; lattice symmetry; phase boundary shift; mutual information
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Funding
- NSF [PIF-1552978]
- MIUR (PRIN) [2010LLKJBX]
- Direct For Mathematical & Physical Scien
- Division Of Physics [GRANTS:13817789] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1552978] Funding Source: National Science Foundation
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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. A82021601; Capogrosso-Sansone et al 2011 Laser Phys. 21 1443). 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.
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