Quantum Gases in Optical Boxes

Navon, Nir; Smith, Robert P.; Hadzibabic, Zoran

doi:10.48550/arxiv.2106.09716

Cited by 3 publications

(3 citation statements)

References 135 publications

(215 reference statements)

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“…New generation of experiments with 3D ultracold gases utilize typically box-like traps [65][66][67][68][69]. In this section we provide predictions of ASLDA method in case of such trap.…”

Section: Impact Of the Trapping Potential Geometrymentioning

confidence: 99%

Vortex lattice in spin-imbalanced unitary Fermi gas

Kopyciński,

Pudełko,

Wlazłowski

2021

Preprint

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We investigate the properties of a spin-imbalanced and rotating unitary Fermi gas. Using a density functional theory (DFT), we provide insight into states that emerge as a result of a competition between Abrikosov lattice formation, spatial phase separation and the emergence of Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. A confrontation of the experimental data [M. Zwierlein et al., Science 311, 492 (2006)] with theoretical predictions provides a remarkable qualitative agreement. In case of gas confined in a harmonic trap, the phase separation into a superfluid core populated by the Abrikosov lattice and a spin-polarized corona is the dominant process. Changing confinement to a box-like trap, reverts the spatial location of the component: gas being in the normal state is surrounded by superfluid threaded by quantum vortices. The vortex lattice no longer exhibits the triangular symmetry, and emergence of exotic geometries may be an indirect signature of the FFLO-like state formation in the system.

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“…New generation of experiments with 3D ultracold gases utilize typically box-like traps [65][66][67][68][69]. In this section we provide predictions of ASLDA method in case of such trap.…”

Section: Impact Of the Trapping Potential Geometrymentioning

confidence: 99%

Vortex lattice in spin-imbalanced unitary Fermi gas

Kopyciński,

Pudełko,

Wlazłowski

2021

Preprint

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“…In experiments the potential ( 18) can be created by laser beams [47,48]. To study oscillations of the supersolid first we create its ground state in the box potential, as shown in figure 4.…”

Section: Supersolid In a Box-like Potentialmentioning

confidence: 99%

Oscillations of a quasi-one-dimensional dipolar supersolid

Turmanov

Baizakov

Abdullaev

et al. 2021

J. Phys. B: At. Mol. Opt. Phys.

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The properties of a supersolid state (SS) in quasi-one-dimensional dipolar Bose-Einstein condensate is studied, considering two possible mechanisms of realization-due to repulsive three-body atomic interactions and quantum fluctuations in the framework of the Lee-Huang-Yang theory. The role of both mechanisms in the formation of SS properties has been emphasized. The proposed theoretical model, based on minimization of the energy functional, allows evaluating the amplitude of the SS for an arbitrary set of parameters in the extended Gross-Pitaevskii equation (eGPE). To explore the dynamics of the SS first we numerically construct its ground state in different settings, including periodic boundary conditions, box-like trap and parabolic potential, then impose a perturbation. In oscillations of the perturbed supersolid we observe the key manifestation of SS, namely the free flow of the superfluid fraction through the crystalline component of the system. Two distinct oscillation frequencies of the supersolid associated with the superfluid fraction and crystalline components of the wave function are identified from numerical simulations of the eGPE.

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“…So far, we have analyzed the two-terminal DC Josephson current where each reservoir is assumed to be uniform. By using box potential techniques available in ultracold atomic gases [60], the current in such a geometry can directly be measured and in fact has been measured in Ref. [24].…”

Section: B Planar Junction Casementioning

confidence: 99%

Tunneling Hamiltonian analysis of DC Josephson currents in a weakly-interacting Bose-Einstein condensate

Uchino

2021

Preprint

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Atomtronics experiments with ultracold atomic gases allow us to explore quantum transport phenomena of a weakly-interacting Bose-Einstein condensate (BEC). Here, we focus on two-terminal transport of such a BEC in the vicinity of zero temperature. By using the tunnel Hamiltonian and Bogoliubov theory, we obtain a DC Josephson current expression in the BEC and apply it to experimentally relevant situations such as quantum point contact and planar junction. Due to the absence of Andreev bound states but the presence of couplings associated with condensation elements, a current-phase relation in the BEC is found to be different from one in an s-wave superconductor.

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Quantum Gases in Optical Boxes

Cited by 3 publications

References 135 publications

Vortex lattice in spin-imbalanced unitary Fermi gas

Vortex lattice in spin-imbalanced unitary Fermi gas

Oscillations of a quasi-one-dimensional dipolar supersolid

Tunneling Hamiltonian analysis of DC Josephson currents in a weakly-interacting Bose-Einstein condensate

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