High-Contrast Interference in a Thermal Cloud of Atoms
arXiv:cond-mat/0412672 · doi:10.1103/PhysRevA.71.043615
Abstract
The coherence properties of a gas of bosonic atoms above the BEC transition temperature were studied. Bragg diffraction was used to create two spatially separated wave packets, which interfere during expansion. Given sufficient expansion time, high fringe contrast could be observed in a cloud of arbitrary temperature. Fringe visibility greater than 90% was observed, which decreased with increasing temperature, in agreement with a simple model. When the sample was "filtered" in momentum space using long, velocity-selective Bragg pulses, the contrast was significantly enhanced in contrast to predictions.
References in corpus (6)
- Observation of resonance condensation of fermionic atom pairs
- Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- Observation of molecules produced from a Bose-Einstein condensate
- Formation of Quantum-Degenerate Sodium Molecules
- Coherent Molecular Optics using Sodium Dimers
Cited by in corpus (18)
- Atom-wave diffraction between the Raman-Nath and the Bragg regime: Effective Rabi frequency, losses, and phase shifts
- Realization of a complete Stern-Gerlach interferometer: Towards a test of quantum gravity
- Overcoming loss of contrast in atom interferometry due to gravity gradients
- Representation-free description of light-pulse atom interferometry including non-inertial effects
- Theory for a Hanbury Brown Twiss experiment with a ballistically expanding cloud of cold atoms
- First-order spatial coherence measurements in a thermalized two-dimensional photonic quantum gas
- Observation of interference between two molecular Bose-Einstein condensates
- Two point correlations of a trapped interacting Bose gas at finite temperature
- Stern-Gerlach Interferometry with the Atom Chip
- Theoretical study of a cold atom beam splitter
- Readout delay free Bragg atom interferometry using overlapped spatial fringes
- Relevance of Bose-Einstein Condensation to the Interference of Two Independent Bose Gases
- Emergence of pointer states in a non-perturbative environment
- Hot Schrödinger Cat States
- Parallel multicomponent interferometer with a spinor Bose-Einstein condensate
- Quantum field theory for multipolar composite bosons with mass defect and relativistic corrections
- Matter-wave interferometers with trapped strongly interacting Feshbach molecules
- Partially coherent matter wave and its evolution