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Trapped Ion Quantum Computing

Coherence of a Josephson phase qubit under partial-collapse measurement

arXiv
Authors: Leonid P. Pryadko, Alexander N. Korotkov

Year

2007

Paper ID

50457

Status

Preprint

Abstract Read

~2 min

Abstract Words

71

Citations

N/A

Abstract

We discuss quantum evolution of a decaying state in relation to a recent experiment of Katz et al. Based on exact analytical and numerical solutions of a simple model, we identify a regime where qubit retains coherence over a finite time interval independently of the rates of three competing decoherence processes. In this regime, the quantum decay process can be continuously monitored via a "weak" measurement without affecting the qubit coherence.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2007 reference point for readers tracking recent quantum research.
  • We discuss quantum evolution of a decaying state in relation to a recent experiment of Katz et al.

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