2016/06/28 by J. M. Gomez Llorente, J. Plata · 8 citations
Engineering · Physics and Astronomy · #Aerospace engineering #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Engineering #Materials science #Orbit (dynamics) #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Raman spectroscopy #Spin (aerodynamics) #Spin–orbit interaction #Strong Light-Matter Interactions #Thermodynamics #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physreva.93.063633
published in Physical Review A 93(6) (American Physical Society)
arxiv created 2016/06/28 · openalex publication_date 2016/06/28 · openalex created_date 2016/07/22 · arxiv updated 2016/08/03 · openalex updated_date 2026/08/05
We focus on a technique recently implemented for controlling the magnitude of synthetic spin-orbit coupling (SOC) in ultracold atoms in the Raman-coupling scenario. This technique uses a periodic modulation of the Raman-coupling amplitude to tune the SOC. Specifically, it has been shown that the effect of a high-frequency sinusoidal modulation of the Raman-laser intensity can be incorporated into the undriven Hamiltonian via effective parameters, whose adiabatic variation can therefore be used to tune the SOC. Here, we characterize the heating mechanisms that can be relevant to this method. We identify the main mechanism responsible for the heating observed in the experiments as basically rooted in driving-induced transfer of population to excited states. Characteristics of that process determined by the harmonic trapping, the decay of the excited states, and the technique used for preparing the system are discussed. Additional heating, rooted in departures from adiabaticity in the variation of the effective parameters, is also described. Our analytical study provides some clues that may be useful in the design of strategies for curbing the effects of heating on the efficiency of the control methods.