Supersolid-superfluid phase separation in the extended Bose-Hubbard model
Visualitza/Obre
10.1103/PhysRevB.104.174514
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/366694
Tipus de documentArticle
Data publicació2021-11-01
EditorAmerican Physical Society (APS)
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteICFOstepstone - ICFOstepstone PhD Programme for Early-Stage Researchers in Photonics (EC-H2020-713729)
NOQIA - NOvel Quantum simulators – connectIng Areas (EC-H2020-833801)
CERQUTE - Certification of quantum technologies (EC-H2020-834266)
QuantERA II - QuantERA II ERA-NET Cofund in Quantum Technologies (EC-H2020-101017733)
OPTOlogic - Optical Topologic Logic (EC-H2020-899794)
STREDCH - Structured electric-dipole-based chirality (EC-H2020-101029393)
NOQIA - NOvel Quantum simulators – connectIng Areas (EC-H2020-833801)
CERQUTE - Certification of quantum technologies (EC-H2020-834266)
QuantERA II - QuantERA II ERA-NET Cofund in Quantum Technologies (EC-H2020-101017733)
OPTOlogic - Optical Topologic Logic (EC-H2020-899794)
STREDCH - Structured electric-dipole-based chirality (EC-H2020-101029393)
Abstract
Recent studies have suggested a new phase in the extended Bose-Hubbard model in one dimension at integer filling. In this work, we show that this new phase is phase-separated into a supersolid and superfluid part, generated by mechanical instability. Numerical simulations are performed by means of the density matrix renormalization group algorithm in terms of matrix product states. In the phase-separated phase and the adjacent homogeneous superfluid and supersolid phases, we find peculiar spatial patterns in the entanglement spectrum and string-order correlation functions and show that they survive in the thermodynamic limit. In particular, we demonstrate that the elementary excitations of the homogeneous superfluid with enhanced periodic modulations are phonons, find the central charge to be
c
=
1
, and show that the velocity of sound, extracted from the intrinsic level splitting for finite systems, matches with the propagation velocity of local excitations in dynamical simulations. This suggests that the low-energy spectrum of the phase under investigation is effectively captured by a spinless Luttinger liquid, for which we find consistent results between the Luttinger parameter obtained from the linear dependence of the structure factor and the algebraic decay of the one-body density matrix.
CitacióKottmann, K. [et al.]. Supersolid-superfluid phase separation in the extended Bose-Hubbard model. "Physical review B", 1 Novembre 2021, vol. 104, núm. 174514, p. 1-22.
ISSN2469-9969
Versió de l'editorhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.174514
Altres identificadorshttps://arxiv.org/abs/2106.05893
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
2106.05893.pdf | 1,342Mb | Visualitza/Obre |