Back to Search Start Over

Quantum trajectories of superconducting qubits

Authors :
Weber, S. J.
Murch, K. W.
Schwartz, M. E.
Roch, N.
Siddiqi, I.
Publication Year :
2015

Abstract

In this review, we discuss recent experiments that investigate how the quantum sate of a superconducting qubit evolves during measurement. We provide a pedagogical overview of the measurement process, when the qubit is dispersively coupled to a microwave frequency cavity, and the qubit state is encoded in the phase of a microwave tone that probes the cavity. A continuous measurement record is used to reconstruct the individual quantum trajectories of the qubit state, and quantum state tomography is performed to verify that the state has been tracked accurately. Furthermore, we discuss ensembles of trajectories, time-symmetric evolution, two-qubit trajectories, and potential applications in measurement-based quantum error correction.

Subjects

Subjects :
Quantum Physics

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.1506.08165
Document Type :
Working Paper
Full Text :
https://doi.org/10.1016/j.crhy.2016.07.007