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Gapped spectrum in pair-superfluid bosons

Autor
Astrakharchik, G.; Zillich, R.; Mazzanti, F.; Boronat, J.
Tipus d'activitat
Article en revista
Revista
Physical review A
Data de publicació
2016-12-22
Volum
94
Número
6
Pàgina inicial
1
Pàgina final
8
DOI
https://doi.org/10.1103/PhysRevA.94.063630 Obrir en finestra nova
Repositori
http://hdl.handle.net/2117/102969 Obrir en finestra nova
URL
http://journals.aps.org/pra/abstract/10.1103/PhysRevA.94.063630 Obrir en finestra nova
Resum
We study the ground state of a bilayer system of dipolar bosons with dipoles oriented by an external field perpendicularly to the two parallel planes. By decreasing the interlayer distance, for a fixed value of the strength of the dipolar interaction, the system undergoes a quantum phase transition from an atomic to a pair superfluid. We investigate the excitation spectrum on both sides of this transition by using two microscopic approaches. Quantum Monte Carlo methods are employed to obtain the...
Citació
Astrakharchik, G., Zillich, R., Mazzanti, F., Boronat, J. Gapped spectrum in pair-superfluid bosons. "Physical review A", 22 Desembre 2016, vol. 94, núm. 6, p. 1-8.
Paraules clau
bilayer system dipolar bosons
Grup de recerca
SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity

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