1. Collapse and Revival of an Artificial Atom Coupled to a Structured Photonic Reservoir
- Author
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Andrew J. Keller, Jash Banker, Mohammad Mirhosseini, Matthew H. Matheny, Eunjong Kim, Oskar Painter, Alp Sipahigil, and Vinicius S. Ferreira
- Subjects
Photon ,QC1-999 ,Population ,FOS: Physical sciences ,General Physics and Astronomy ,01 natural sciences ,010305 fluids & plasmas ,law.invention ,Computer Science::Emerging Technologies ,law ,Quantum mechanics ,Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ,0103 physical sciences ,010306 general physics ,education ,Passband ,Quantum ,Physics ,Quantum Physics ,education.field_of_study ,Condensed Matter - Mesoscale and Nanoscale Physics ,business.industry ,Qubit ,Relaxation (physics) ,Photonics ,Quantum Physics (quant-ph) ,business ,Waveguide - 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., 19 pages, 11 figures with appendices
- Published
- 2021