Dipolar Bose-Einstein condensates with large scattering length

Young-S., Luis E.; Adhikari, Sadhan K.; Muruganandam, Paulsamy

doi:10.1103/physreva.85.033619

Cited by 4 publications

(5 citation statements)

References 67 publications

(111 reference statements)

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“…Stable checkerboard, star, and stripe configurations in dipolar BECs have been identified in a two-dimensional (2D) optical lattice as stable Mott insulator [19] as well as superfluid soliton [20] states. A new possibility of studying universal properties of dipolar BECs at unitarity has been suggested [21].…”

Section: Introductionmentioning

confidence: 99%

Stability and collapse of fermions in a binary dipolar boson-fermion164Dy-161Dy mixture

Adhikari

2013

Phys. Rev. A

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We suggest a time-dependent mean-field hydrodynamic model for a binary dipolar boson-fermion mixture to study the stability and collapse of fermions in the 164 Dy-161 Dy mixture. The condition of stability of the dipolar mixture is illustrated in terms of phase diagrams. A collapse is induced in a disk-shaped stable binary mixture by jumping the interspecies contact interaction from repulsive to attractive by the Feshbach resonance technique. The subsequent dynamics is studied by solving the time-dependent mean-field model including three-body loss due to molecule formation in boson-fermion and boson-boson channels. Collapse and fragmentation in the fermions after subsequent explosions are illustrated. The anisotropic dipolar interaction leads to anisotropic fermionic density distribution during collapse. This study is carried out in three-dimensional space using realistic values of dipolar and contact interactions.

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Section: Introductionmentioning

confidence: 99%

Stability and collapse of fermions in a binary dipolar boson-fermion164Dy-161Dy mixture

Adhikari

2013

Phys. Rev. A

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“…Distinct stable checkerboard, stripe, and star configurations in dipolar BECs have been identified in a two-dimensional (2D) optical lattice as a stable Mott insulator [17] as well as superfluid soliton [18] states. A new possibility of studying the universal properties of dipolar BECs for large scattering length has been suggested [19]. Many of these features have only been predicted theoretically, although some of them have already been experimentally confirmed.…”

Section: Introductionmentioning

confidence: 99%

Mixing, demixing, and structure formation in a binary dipolar Bose-Einstein condensate

Young-S.

Adhikari

2012

Phys. Rev. A

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We study the static properties of disk-shaped binary dipolar Bose-Einstein condensates of 168 Er-164 Dy and 52 Dy mixtures under the action of interspecies and intraspecies contact and dipolar interactions and demonstrate the effect of dipolar interaction using the mean-field approach. Throughout this study we use realistic values of interspecis and intraspecies dipolar interactions and the intraspecies scattering lengths and consider the interspecies scattering length as a parameter. The stability of the binary mixture is illustrated through phase plots involving a number of atoms of the species. The binary system always becomes unstable as the number of atoms increases beyond a certain limit. As the interspecies scattering length increases corresponding to more repulsion, an overlapping mixed state of the two species changes to a separated demixed configuration. During the transition from a mixed to a demixed configuration as the interspecies scattering length is increased for parameters near the stability line, the binary condensate shows special transient structures in density in the form of red-blood-cell-like biconcave and Saturn-ring-like shapes, which are direct manifestations of the dipolar interaction.

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“…An approximate variational solution of ( 25) is possible with the following ansatz for density [41] n(ρ) = 1/ πw 2 ρ exp − ρ 2 w 2 ρ , while the width w ρ is determined by solving (16) with w z = d z and κ = w ρ /d z .…”

Section: Approximate Density For Cigar and Disc Shapesmentioning

confidence: 99%

“…With this initial condition ( 35) is solved by real-time propagation [43] to study sound waves. Typical anisotropic sound propagation in θ = 0 (num,n 0 =10 16 /cm 3 ) θ = 0 (ana,n 0 =10 16 /cm 3 ) θ = π/2 (num,n 0 =10 16 /cm 3 ) θ = π/2 (ana,n 0 =10 16…”

Section: Anisotropic Sound Propagation In Uniform Dipolar Fermi Gasmentioning

confidence: 99%

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Study of a degenerate dipolar Fermi gas of¹⁶¹Dy atoms

Adhikari¹

2012

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

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We study properties of a single-component (spin polarized) degenerate dipolar Fermi gas of 161 Dy atoms using a hydrodynamic description.Under axially-symmetric trapping we suggest reduced one-(1D) and two-dimensional (2D) description of the same for cigar and disk shapes, respectively. In addition to a complete numerical solution of the hydrodynamic model we also consider a variational approximation of the same. For a trapped system under appropriate conditions, the variational approximation as well as the reduced 1D and 2D models are found to yield results for shape, size and chemical potential of the system in agreement with the full numerical solution of the three-dimensional (3D) model. For the uniform system we consider anisotropic sound propagation in 3D. An analytical result for anisotropic sound propagation in uniform dipolar degenerate Fermi gas is found to be in agreement with results of numerical simulation in 3D.

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Dipolar Bose-Einstein condensates with large scattering length

Cited by 4 publications

References 67 publications

Stability and collapse of fermions in a binary dipolar boson-fermion164Dy-161Dy mixture

Stability and collapse of fermions in a binary dipolar boson-fermion164Dy-161Dy mixture

Mixing, demixing, and structure formation in a binary dipolar Bose-Einstein condensate

Study of a degenerate dipolar Fermi gas of¹⁶¹Dy atoms

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Dipolar Bose-Einstein condensates with large scattering length

Cited by 4 publications

References 67 publications

Stability and collapse of fermions in a binary dipolar boson-fermion164Dy-161Dy mixture

Stability and collapse of fermions in a binary dipolar boson-fermion164Dy-161Dy mixture

Mixing, demixing, and structure formation in a binary dipolar Bose-Einstein condensate

Study of a degenerate dipolar Fermi gas of161Dy atoms

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Product

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Study of a degenerate dipolar Fermi gas of¹⁶¹Dy atoms