Fragmentation and destruction of the superfluid due to frustration of cold atoms in optical lattices

García-Ripoll, Juan José; Pachos, Jiannis K.

doi:10.1088/1367-2630/9/5/139

Cited by 9 publications

(10 citation statements)

References 46 publications

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“…An important point to note is that in Ref. [14], on the other hand, the coupling between internal levels is not originating from a non-zero detuning (as in the current paper) or from a non-zero angle θ (as in [12,13]), but from atom-atom scattering. We explicitly show that the two-level structure of our model renders dispersion curves having local minima.…”

Section: Introductionmentioning

confidence: 78%

Coupled two-component atomic gas in an optical lattice

Larson

Martikainen

2008

Phys. Rev. A

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We present an ab initio study of the ground state of an ideal coupled two-component gas of ultracold atoms in a one dimensional optical lattice, either bosons or fermions. Due to the internal two-level structure of the atoms, the Brillouin zone is twice as large as imposed by the periodicity of the lattice potential. This is reflected in the Bloch dispersion curves, where the energy bands regularly possess several local minima. As a consequence, when the system parameters are tuned across a resonance condition, a non-zero temperature phase transition occurs which arises from an interplay between internal and kinetic atomic energies. For fermions, this phase transition is of topological character since the structure of the Fermi surface is changed across the critical value. It is shown that these phenomena are also expected to occur for two and three dimensional optical lattices.Comment: 10 pages, 7 figure

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Section: Introductionmentioning

confidence: 78%

Coupled two-component atomic gas in an optical lattice

Larson

Martikainen

2008

Phys. Rev. A

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“…Our model was a direct but rather surprising result of our previous work on quantum computation on triangular optical lattices. Subsequently, I became more interested in the realisation of more exotic phases [147][148][149]. The sophistication of our newly-developed techniques even lead to the possibility of simulating relativistic quantum field theories [150] and Abelian and non-Abelian gauge theories [151,152].…”

Section: Quantum Computation With Many-particle Systems -Pachosmentioning

confidence: 99%

Journeys from quantum optics to quantum technology

Barnett

Beige

Ekert

et al. 2017

Progress in Quantum Electronics

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A B S T R A C TSir Peter Knight is a pioneer in quantum optics which has now grown to an important branch of modern physics to study the foundations and applications of quantum physics. He is leading an effort to develop new technologies from quantum mechanics. In this collection of essays, we recall the time we were working with him as a postdoc or a PhD student and look at how the time with him has influenced our research.

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“…2a, which is itself taken from Ref. [43]. It consists on an optical lattice trapping atoms in states |↑ and |↓ , together with a Raman coupling between these states.…”

Section: Appendix a Derivation Of The Model In Superlatticesmentioning

confidence: 99%

Correlated hopping of bosonic atoms induced by optical lattices

Eckholt

García-Ripoll

2009

New J. Phys.

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In this work we analyze a particular setup with ultracold atoms trapped in state-dependent lattices. We show that any asymmetry in the contact interaction translates into one of two classes of correlated hopping. After deriving the effective lattice Hamiltonian for the atoms, we obtain analytically and numerically the different phases and quantum phase transitions. We find for weak correlated hopping both Mott insulators and charge density waves, while for stronger correlated hopping the system transitions into a pair superfluid. We demonstrate that this phase exists for a wide range of interaction asymmetries and has interesting correlation properties that differentiate it from an ordinary atomic Bose-Einstein condensate.

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Fragmentation and destruction of the superfluid due to frustration of cold atoms in optical lattices

Cited by 9 publications

References 46 publications

Coupled two-component atomic gas in an optical lattice

Coupled two-component atomic gas in an optical lattice

Journeys from quantum optics to quantum technology

Correlated hopping of bosonic atoms induced by optical lattices

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