Resonance phenomena in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>e</mml:mi><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-Li collisions

Liu, F.; Cheng, Yongjun; Zhou, Yan; Jiao, Li Guang

doi:10.1103/physreva.83.032718

Cited by 22 publications

(12 citation statements)

References 24 publications

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“…In Ref. [24] a Bose-Einstein supersolid phase in 2dimensions with a step-like pair interaction showing a soft-core below a given core radius and a dipolar repulsive term at larger distances has been studied and the phase diagram obtained. The nucleation of vortices in a dipole-blockade 2-dimensional supersolid condensate and its effect on the superfluid fraction has been investigated in Ref.…”

Section: Introductionmentioning

confidence: 99%

Supersolid structure and excitation spectrum of soft-core bosons in three dimensions

2013

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By means of a mean-field method, we have studied the zero temperature structure and excitation spectrum of a three-dimensional soft-core bosonic system for a value of the interaction strength that favors a crystal structure made of atomic nano-clusters arranged with FCC ordering. In addition to the longitudinal and transverse phonon branches expected for a normal crystal, the excitation spectrum shows a soft mode related to the breaking of gauge symmetry, which signals a partial superfluid character of the solid. Additional evidence of supersolidity is provided by the calculation of the superfluid fraction, which shows a first-order drop, from 1 to 0.4, at the liquid-supersolid transition and a monotonic decrease as the interaction strength parameter is increased. The conditions for the coexistence of the supersolid with the homogeneous superfluid are discussed, and the surface tension of a representative solid-liquid interface is calculated.

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Section: Introductionmentioning

confidence: 99%

Supersolid structure and excitation spectrum of soft-core bosons in three dimensions

2013

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“…Particular interest represent longwavelength structures, with unit cells containing macroscopically large amount of particles. Despite numerous theoretical proposals [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] , no convincing evidence of existence of such structures in nature has been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Following significant advances in creation of ultracold polar molecules 18 , a possibility of a supersolid with dipolar gases tightly confined to two dimensions (2D) and having dipole moments oriented perpendicular to the plane of their translational motion has been theoretically considered 7,13 . These studies were triggered by prediction of the helium-like roton-maxon instability 19 and are now focused on the properties of possible quantum phases and transitions between them.…”

Section: Introductionmentioning

confidence: 99%

Fragmented-condensate solid of dipolar excitons

Andreev

2017

Phys. Rev. B

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We discuss a possible link between the recently observed macroscopic ordering of ultra cold dipolar excitons (MOES) and the phenomenon of supersolidity. In the dilute limit we predict a stable supersolid state for a quasi-one-dimensional system of bosonic dipoles characterized by two- and three-body contact repulsion. We phenomenologically extend our theory to the strongly-correlated regime and find a critical value of the contact interaction parameter at which the supersolid exhibits a quantum phase transition to a fragmented state. The wavelength of the fragmented-condensate solid is defined by the balance between the quantum pressure and the entropy due to fluctuations of the relative phases between the fragments. Our model appears to be in good agreement with the relevant experimental data, including the very recent results on commensurability effect and wavelength of the MOES.Comment: 16 pages, 5 figure

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“…A supersolid phase is described by simultaneous existence of crystalline order and superfluid order in the system. Various experimental and theoretical studies have been carried out for finding supersolidity [15][16][17][18][19][20][21][22][23][24][25] . Interestingly, pair-supersolid (PSS) is defined as a phase where one finds simultaneous existence of pair-superfluidity and modulation in density, with vanishing single-particle superfluidity [9][10][11]26 .…”

Section: Introductionmentioning

confidence: 99%

Quantum phases of hardcore bosons in two coupled chains: A density matrix renormalization group study

2015

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We consider hardcore bosons in two coupled chain of one dimensional lattices at half filling with repulsive intra-chain interaction and inter-chain attraction. This can be mapped on to a coupled chain of spin-1/2 XXZ model with inter chain ferromagnetic coupling. We investigate various phases of hardcore bosons (and related spin model) at zero temperature by density matrix renormalization group method. Apart from the usual superfluid and density wave phases, pairing of inter chain bosons leads to the formation of novel phases like pair-superfluid and density wave of strongly bound pairs. We discuss the possible experimental realization of such correlated phases in the context of cold dipolar gas.

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Resonance phenomena ine+-Li collisions

Cited by 22 publications

References 24 publications

Supersolid structure and excitation spectrum of soft-core bosons in three dimensions

Supersolid structure and excitation spectrum of soft-core bosons in three dimensions

Fragmented-condensate solid of dipolar excitons

Quantum phases of hardcore bosons in two coupled chains: A density matrix renormalization group study

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