Decoherence and Collisional Frequency Shifts of Trapped Bosons and Fermions
arXiv:0908.3147 · doi:10.1103/PhysRevLett.103.113202
Abstract
We perform exact calculations of collisional frequency shifts for several fermions or bosons using a singlet and triplet basis for pairs of particles. The "factor of 2 controversy" for bosons becomes clear - the factor is always 2. Decoherence is described by singlet states and they are unaffected by spatially uniform clock fields. Spatial variations are critical, especially for fermions which were previously thought to be immune to collision shifts. The spatial variations lead to decoherence and a novel frequency shift that is not proportional to the partial density of internal states.
Final version with corrected and clarified discussion of g2
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Cited by in corpus (11)
- Ultracold Fermi Gases with Emergent SU(N) Symmetry
- Radiofrequency spectroscopy of a strongly interacting two-dimensional Fermi gas
- Quantum correlations and entanglement in far-from-equilibrium spin systems
- Spin waves and Collisional Frequency Shifts of a Trapped-Atom Clock
- S-Wave Collisional Frequency Shift of a Fermion Clock
- Quantum engineering of atomic phase-shifts in optical clocks
- Simulating fermions in spin-dependent potentials with spin models on an energy lattice
- Lattice-induced non-adiabatic frequency shifts in optical lattice clocks
- Clock frequency estimation under spontaneous emission
- Effect of trap symmetry and atom-atom interactions on a trapped atom interferometer with internal state labelling
- Interaction-enhanced double resonance in cold gases