Prediction of Short Time Qubit Readout via Measurement of the Next Quantum Jump of a Coupled Damped Driven Harmonic Oscillator

Massimo Porrati; Seth Putterman

doi:10.1103/PhysRevLett.125.260403

Prediction of Short Time Qubit Readout via Measurement of the Next Quantum Jump of a Coupled Damped Driven Harmonic Oscillator

Phys Rev Lett. 2020 Dec 31;125(26):260403. doi: 10.1103/PhysRevLett.125.260403.

Authors

Massimo Porrati¹, Seth Putterman²

Affiliations

¹ Center for Cosmology and Particle Physics, Department of Physics, New York University, 726 Broadway, New York, New York 10003, USA.
² Department of Physics and Astronomy, University of California, Los Angeles, California 90095-1547, USA.

PMID: 33449707
DOI: 10.1103/PhysRevLett.125.260403

Abstract

The dynamics of the next quantum jump for a qubit [two level system] coupled to a readout resonator [damped driven harmonic oscillator] is calculated. A quantum mechanical treatment of readout resonator reveals nonexponential short time behavior which could facilitate detection of the state of the qubit faster than the resonator lifetime.