Time-reversal symmetrization of spontaneous emission for quantum state transfer
Srikanth J. Srinivasan, Neereja Sundaresan, Darius J Sadri, Yanbing Liu, Jay Gambetta, Terri M. Yu, S. M. Girvin, Andrew Houck · Physical Review A · 2014
We demonstrate the ability to control spontaneous emission from a superconducting qubit coupled to a cavity. The time domain profile of the emitted photon is shaped into a symmetric truncated exponential. The experiment is enabled by a qubit coupled to a cavity, with a coupling strength that can be tuned in tens of nanoseconds while maintaining a constant dressed state emission frequency. Symmetrization of the photonic wave packet will enable use of photons as flying qubits for transferring the quantum state between atoms in distant cavities.