Characterizing ultra-narrow momentum of atoms by standing-wave light-pulse sequences
arXiv:2205.02416 · doi:10.1364/JOSAB.469158
Abstract
We propose a method to characterize the ultra-narrow momentum distribution of atomic gases by employing a standing-wave light-pulse sequences beam-splitter. The mechanism of beam splitting is analyzed in detail, and the influence of a finite-width momentum distribution on the population of each diffraction order is given. The temperature of ultracold atomic gases can be calibrated by measuring the ratio of population in different diffraction orders after double standing-wave light-pulses. We obtain analytical expressions for two typical cases, and demonstrate phase space evolution in the whole process by using the Wigner function. This method is valid for both classical atomic gas and Bose-Einstein condensates, and it is suited for temperature measurement on the space ultra-cold atomic physics platform, in which the ultra-narrow momentum distribution of atomic gas is on the order of 100pK or even lower.
References in corpus (10)
- Atom Interferometers
- Observation of the supersolid stripe phase in spin-orbit coupled Bose-Einstein condensates
- Supersolid formation in a quantum gas breaking continuous translational symmetry
- Matter wave lensing to picokelvin temperatures
- Macroscopicity of Mechanical Quantum Superposition States
- An Atomic Gravitational Wave Interferometric Sensor in Low Earth Orbit (AGIS-LEO)
- Single-qubit thermometry
- In situ thermometry of a cold Fermi gas via dephasing impurities
- Limits on Universality in Ultracold Three-Boson Recombination
- Nearly nondestructive thermometry of labeled cold atoms and application to isotropic laser cooling