Group delay controlled by the decoherence of a single artificial atom
arXiv:2409.07731 · doi:10.1103/fkzb-fxv4
Abstract
The ability to slow down light at the single-photon level has applications in quantum information processing and other quantum technologies. We demonstrate two methods, both using just a single artificial atom, enabling dynamic control over microwave light velocities in waveguide quantum electrodynamics (waveguide QED). Our methods are based on two distinct mechanisms harnessing the balance between radiative and non-radiative decay rates of a superconducting artificial atom in front of a mirror. In the first method, we tune the radiative decay of the atom using interference effects due to the mirror; in the second method, we pump the atom to control its non-radiative decay through the Autler--Townes effect. When the half the radiative decay rate exceeds the non-radiative decay rate, we observe positive group delay; conversely, dominance of the non-radiative decay rate results in negative group delay. Our results advance signal-processing capabilities in waveguide QED.
References in corpus (19)
- Charge insensitive qubit design derived from the Cooper pair box
- Controllable scattering of photons inside a one-dimensional resonator waveguide
- Photon-mediated interactions between distant artificial atoms
- Efficient and robust analysis of complex scattering data under noise in microwave resonators
- On-Demand Directional Microwave Photon Emission Using Waveguide Quantum Electrodynamics
- Generating Spatially Entangled Itinerant Photons with Waveguide Quantum Electrodynamics
- Programmable directional emitter and receiver of itinerant microwave photons in a waveguide
- Discerning quantum memories based on electromagnetically-induced-transparency and Autler-Townes-splitting protocols
- Frequency and temporal effects in linear optical quantum computing
- Characterizing decoherence rates of a superconducting qubit by direct microwave scattering
- Phase-controlled pathway interferences and switchable fast-slow light in a cavity-magnon polariton system
- Control of photon propagation via electromagnetically induced transparency in lossless media
- Realization of a Universal Quantum Gate Set for Itinerant Microwave Photons
- Propagating Wigner-Negative States Generated from the Steady-State Emission of a Superconducting Qubit
- Slow Light Nanocoatings for Ultrashort Pulse Shaping
- Deterministic loading and phase shaping of microwaves onto a single artificial atom
- Nonequilibrium heat transport and work with a single artificial atom coupled to a waveguide: emission without external driving
- Slowing down light in a qubit metamaterial
- Tuning atom-field interaction via phase shaping