Kavli Affiliate: Mohammad Mirhosseini
| First 5 Authors: Vinicius S. Ferreira, Jash Banker, Alp Sipahigil, Matthew H. Matheny, Andrew J. Keller
| Summary:
A structured electromagnetic reservoir can result in novel dynamics of
quantum emitters. In particular, the reservoir can be tailored to have a memory
of past interactions with emitters, in contrast to memory-less Markovian
dynamics of typical open systems. In this Article, we investigate the
non-Markovian dynamics of a superconducting qubit strongly coupled to a
superconducting slow-light waveguide reservoir. Tuning the qubit into the
spectral vicinity of the passband of this waveguide, we find non-exponential
energy relaxation as well as substantial changes to the qubit emission rate.
Further, upon addition of a reflective boundary to one end of the waveguide, we
observe revivals in the qubit population on a timescale 30 times longer than
the inverse of the qubit’s emission rate, corresponding to the round-trip
travel time of an emitted photon. By tuning of the qubit-waveguide interaction
strength, we probe a crossover between Markovian and non-Markovian qubit
emission dynamics. These attributes allow for future studies of multi-qubit
circuits coupled to structured reservoirs, in addition to constituting the
necessary resources for generation of multiphoton highly entangled states.
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