Year: 2024
Type: article
Abstract: Motivated by the recent progress in realizing and controlling extended Bose-Hubbard systems using excitonic or atomic devices, the present Letter theoretically investigates the case of a two-band Bose-Hubbard chain with nearest-neighbor interactions. Specifically, this study concentrates on the scenario where, due to the interactions, one band supports a density-wave phase, i.e., a correlated insulating phase with spontaneous breaking of translational symmetry in the lattice, while the other band supports superfluid behavior. Using the density matrix renormalization group method, we show that supersolid order can emerge from such a combination, that is, an elusive quantum state that combines crystalline order with long-range phase coherence. Depending on the filling of the bands and the interband interaction strength, the supersolid phase competes with phase-separation, superfluid order, or Mott insulating density-wave order. As a possible setup to observe supersolidity, we propose the combination of a lower band supporting density-wave order and a thermally excited band that supports superfluidity due to weaker lattice confinement.
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: Fundación BBVA, Centres de Recerca de Catalunya, Institut de Ciències Fotòniques, European Commission, Generalitat de Catalunya, Eusko Jaurlaritza, Narodowe Centrum Nauki, Narodowym Centrum Nauki, Banco Bilbao Vizcaya Argentaria, Barcelona Supercomputing Center, Fundación Bancaria Caixa d'Estalvis i Pensions de Barcelona, QuantERA, European Climate, Infrastructure and Environment Executive Agency, HORIZON EUROPE Framework Programme, European Research Council, Agència de Gestió d'Ajuts Universitaris i de Recerca, European Regional Development Fund, Agencia Estatal de Investigación, NextGenerationEU
Awards: G1049070721, G1188902550, G120905174, G1255325603, G1272927172, G1409837385, G148743912, NExt level Quantum information processing for Science and Technology, G1622782223, G162601807, Junior Leader la Caixa Postdoctoral Fellowship Programme: Shaping the new generation of leaders in research, G1888088267, G1908469581, G1953887145, Programmable Atomic Large-scale Quantum Simulation 2 - SGA1, G2064873908, G2105798022, G2236380367, G2262748287, G2575991346, G2601397997, G2744780120, G2763573136, G2871827553, G288263039, G2988934680, G3005324705, G300979063, G3302599245, G3480869486, G348919436, G357246561, G3610115285, G3639969887, G3674674691, G3681454997, G3798495387, G3939077204, G4042783231, G408490004, G410571670, G4239348134, G425668148, G4307805095, G434337789, G4359800586, G4391008399, G451917667, G4630312626, G4680432388, G4727238542, G5065677113, G5080475149, G531036588, G575169067, G5852091828, QuantERA II ERA-NET Cofund in Quantum Technologies, G5955501538, G5967599077, G5971291011, G6275411036, Structured electric-dipole-based chirality, G6482940084, G6552004136, G6656126374, G6727213032, G6731467812, G6743926034, G6781993939, G696401826, G704744937, G7051150526, G7084143925, G7226647862, G7327758667, G7425137858, G7615865815, G7685134749, G8180681537, G8283979283, G8370579132, G853839195, Optical Topologic Logic, G8665153912, G8684520763, G8959349008
OpenAlex ID: W4393094480