Collapse and Revival of an Artificial Atom Coupled to a Structured Photonic Reservoir

• URL: http://arxiv.org/abs/2001.03240v1
• Date: Thu, 9 Jan 2020 22:05:55 GMT
• Title: Collapse and Revival of an Artificial Atom Coupled to a Structured Photonic Reservoir
• Authors: Vinicius S. Ferreira, Jash Banker, Alp Sipahigil, Matthew H. Matheny, Andrew J. Keller, Eunjong Kim, Mohammad Mirhosseini and Oskar Painter
• Abstract summary: A structured electromagnetic reservoir can result in novel dynamics of quantum emitters. In this Article, we investigate the non-Markovian dynamics of a superconducting qubit strongly coupled to a superconducting slow-light waveguide reservoir.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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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