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Quantum Phases of Bosons in Double-Well Optical Lattices



Ippei Danshita, J G. Williams, Carlos Sa de Melo, Charles W. Clark


We study the superfluid to Mott insulator transition of bosons in a two-legged ladder optical lattice, of a type accessible in current experiments on double-well optical lattices. The zero-temperature phase diagram is mapped out, with a focus on its dependence upon interchain hopping and the tilt between double wells. We find that the unit-filling Mott phase exhibits a non-monotonic behavior as a function of the tilt parameter, producing a reentrant phase transition between Mott insulator and superfluid phases.
Physical Review Letters


optical lattice, quantum phase transition, time-evolving block decimation


Danshita, I. , Williams, J. , Sa, C. and Clark, C. (2007), Quantum Phases of Bosons in Double-Well Optical Lattices, Physical Review Letters, [online], (Accessed February 26, 2024)
Created October 4, 2007, Updated February 17, 2017