2019/11/30 by Hong-Mei Zou, Jianhe Yang, Danping Lin +1 · 2 citations
Computer Science · Physics and Astronomy · #Atom (system on chip) #Coupling (piping) #Dissipative system #Limit (mathematics) #Mechanical and Optical Resonators #Operator (biology) #Quantum #Quantum Information and Cryptography #Quantum process #Quantum system #Representation (politics) #quant-ph #stochastic dynamics and bifurcation
paper · pdf · doi:10.1088/1361-6455/ab82e2
published in Journal of Physics B Atomic Molecular and Optical Physics 53(13), 135502 (IOP Publishing)
openalex created_date 2019/11/22 · openalex publication_date 2020/03/24 · arxiv created 2020/07/19 · arxiv updated 2020/07/21 · openalex updated_date 2026/08/06
Abstract In this work, we obtain an analytical representation of the density operator of an atom in a dissipative cavity when the reservoir is at zero temperature and the total number of excitations is N = 1. We also investigated the quantum speed limit time (QSLT) of the atom and the non-Markovianity in the dynamics process. The results show that the QSLT and the non-Markovianity can be effectively manipulated by the atom–cavity coupling and the reservoir parameters. Both of the atom–cavity coupling and the detuning can induce a sudden transition from Markovian to non-Markovian dynamics, and this transition is the main physical reason of the quantum speed-up process. The critical value of the sudden transition from no speed-up to speed-up the atom–cavity coupling and the reservoir parameters. The corresponding physical explanation is also provided for our results.