We study ultracold neutral fermion superfluids in the presence of fictitious magnetic fields, as well as charged fermion superfluids in the presence of real magnetic fields. Charged fermion superfluids undergo a phase transition from type-I to type-II superfluidity, where the magnetic properties of the superfluid change from being a perfect diamagnet without vortices to a partial diamagnet with the emergence of the Abrikosov vortex lattice. The transition from type-I to type-II superfluidity is tuned by changing the scattering parameter (interaction) for fixed density. We also find that neutral fermion superfluids such as $^{6}\mathrm{Li}$ and $^{40}\mathrm{K}$ are extreme type-II superfluids and are more robust to the penetration of a fictitious magnetic field in the BCS-BEC crossover region near unitarity, where the critical fictitious magnetic field reaches a maximum as a function of the scattering parameter (interaction).We study ultracold neutral fermion superfluids in the presence of fictitious magnetic fields, as well as charged fermion superfluids in the presence of real magnetic fields. Charged fermion superfluids undergo a phase transition from type-I to type-II superfluidity, where the magnetic properties of the superfluid change from being a perfect diamagnet without vortices to a partial diamagnet with the emergence of the Abrikosov vortex lattice. The transition from type-I to type-II superfluidity is tuned by changing the scattering parameter (interaction) for fixed density. We also find that neutral fermion superfluids such as $^{6}\mathrm{Li}$ and $^{40}\mathrm{K}$ are extreme type-II superfluids and are more robust to the penetration of a fictitious magnetic field in the BCS-BEC crossover region near unitarity, where the critical fictitious magnetic field reaches a maximum as a function of the scattering parameter (interaction).

arXiv:1003.2405Physical Review AApr 26, 20116 citations

Dipolar BEC in an Artificial Magnetic Field

Zalihe Ozcakmakli, C. Yüce

APSMay 1, 20110 citations

Fictitious Magnetic Resonance by Quasi-Electrostatic Field

Jun Kobayashi, Kosuke Shibata, Takatoshi Aoki +2 more

Abstract We propose a new kind of spin manipulation method using a fictitious magnetic field generated by a quasi-electrostatic field. The method can be applicable to every atom with electron spins and has distinct advantages of small photon scattering rate and local addressability. By using a CO2 laser as a quasi-electrostatic field, we have experimentally demonstrated the proposed method by observing the Rabi-oscillation of the ground state hyperfine spin F = 1 of the cold 87 Rb atoms and the Bose-Einstein condensate. PACS: 32.90.+a, 03.75.Mn, 32.10.Fn, 32.10.Dk 1Abstract We propose a new kind of spin manipulation method using a fictitious magnetic field generated by a quasi-electrostatic field. The method can be applicable to every atom with electron spins and has distinct advantages of small photon scattering rate and local addressability. By using a CO2 laser as a quasi-electrostatic field, we have experimentally demonstrated the proposed method by observing the Rabi-oscillation of the ground state hyperfine spin F = 1 of the cold 87 Rb atoms and the Bose-Einstein condensate. PACS: 32.90.+a, 03.75.Mn, 32.10.Fn, 32.10.Dk 1

Jan 1, 20083 citations

Towards BEC with permanent magnetic microstructures

S. Whitlock, A. I. Sidorov, Wang, J. +2 more

Jan 1, 20030 citations

^{6}\mathrm{Li}

and

^{40}\mathrm{K}

are extreme type-II superfluids and are more robust to the penetration of a fictitious magnetic field in the BCS-BEC crossover region near unitarity, where the critical fictitious magnetic field reaches a maximum as a function of the scattering parameter (interaction).