2020/01/09 by Vinicius S. Ferreira, Ferreira, Vinicius S., Jash Banker +13 · 10 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum optics and atomic interactions #Cold Atom Physics and Bose-Einstein Condensates
paper · pdf · doi:10.48550/arxiv.2001.03240
A structured electromagnetic reservoir can result in novel dynamics of\nquantum emitters. In particular, the reservoir can be tailored to have a memory\nof past interactions with emitters, in contrast to memory-less Markovian\ndynamics of typical open systems. In this Article, we investigate the\nnon-Markovian dynamics of a superconducting qubit strongly coupled to a\nsuperconducting slow-light waveguide reservoir. Tuning the qubit into the\nspectral vicinity of the passband of this waveguide, we find non-exponential\nenergy relaxation as well as substantial changes to the qubit emission rate.\nFurther, upon addition of a reflective boundary to one end of the waveguide, we\nobserve revivals in the qubit population on a timescale 30 times longer than\nthe inverse of the qubit's emission rate, corresponding to the round-trip\ntravel time of an emitted photon. By tuning of the qubit-waveguide interaction\nstrength, we probe a crossover between Markovian and non-Markovian qubit\nemission dynamics. These attributes allow for future studies of multi-qubit\ncircuits coupled to structured reservoirs, in addition to constituting the\nnecessary resources for generation of multiphoton highly entangled states.\n