Sawtooth-wave adiabatic passage in a magneto-optical trap

Entropy transfer from a quantum particle to a classical coherent light field

“…We have quantified the cavity state's alteration due to the particle-cavity interaction through the measurement of fidelity and shown that the cavity field contains information about the initial state of the particle by the method of Bayesian inference and using quantum information theoretic techniques. Our results demand reconsideration of the underlying physics of laser cooling and optical pumping in the strong particle-light coupling regime [10,[28][29][30][31], as it suggests that the assumption of an unperturbed light field is not necessarily accurate.…”

Stimulated Slowing of Yb Atoms on the Narrow 1S0 →3P1 Transition

“…Previous laser cooling methods developed to improve loading efficiency for MOTs that trap Yb and other alkaline-earth-metal-like atoms include tailored Zeeman slowers [7][8][9] and preloading 2D-MOTs [10]. Other methods include adiabatic rapid passage [11][12][13][14][15][16][17], Sisyphus-like deceleration [18], two-photon cooling [19], two-color cooling [20,21], and quenched narrow-line cooling [22][23][24] that takes advantage of the narrower transitions to achieve very low temperatures. Combining several of these techniques can produce an ultracold atom source with higher phase-space densities [25].…”

Speeding Up Particle Slowing using Shortcuts to Adiabaticity

“…Even if this does not occur, spontaneous emission of many photons creates momentum diffusion due to the random emission direction, and this results in heating and a finite limit on the achievable temperatures. These issues make methods that increase slowing forces and minimize the number of scattering events through enhanced control of tailored coherent dynamics, such as sawtooth-wave adiabatic passage (SWAP) cooling [23][24][25][26][27][28], the Allen-Eberly scheme [29], stimulated Raman adiabatic passage (STI-RAP), the adiabatic passage force, and the bichromatic force [30][31][32][33][34][35] enticing candidates to consider for particle slowing. However, one concern is that in order to satisfy an intrinsic adiabaticity condition, the time evolution should typically be slow and this could result in a long stopping time and associated large stopping distance.…”