Supersolid in a one-dimensional model of hard-core bosons

Abstract

We study a system of hardcore boson on a one-dimensional lattice with frustrated next-nearest neighbor hopping and nearest neighbor interaction. At half filling, for equal magnitude of nearest and next-nearest neighbor hopping, the ground state of this system exhibits a first order phase transition from a Bond-Ordered (BO) solid to a Charge-Density-Wave(CDW) solid as a function of the nearest neighbor interaction. Moving away from half filling we investigate the system at incommensurate densities, where we find a SuperSolid (SS) phase which has concurrent off-diagonal long range order and density wave order which is unusual in a system of hardcore bosons in one dimension. Using the finite-size Density-Matrix Renormalization Group (DMRG) method, we obtain the complete phase diagram for this model.

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• Effective triangular ladders with staggered flux from spin-orbit coupling in 1D optical lattices
• "Quantum bipolaron" superconductivity from quadratic electron-phonon coupling
• Density-induced geometric frustration of ultra-cold bosons in optical lattices
• Quantum phases of hardcore bosons in two coupled chains: A density matrix renormalization group study
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• Study of long-range orders of hard-core bosons coupled to cooperative normal modes in two-dimensional lattices
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• Interaction-induced Drude weight enhancement in frustrated systems
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• Drude weight in hard core Boson systems: possibility of a finite temperature ideal conductor
• Frustrated Bose ladder with extended range density-density interaction