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Trapped Ion Quantum Computing

Robust entanglement-based magnetic field sensor beyond the standard quantum limit

arXiv
Authors: Tohru Tanaka, Paul Knott, Yuichiro Matsuzaki, Shane Dooley, Hiroshi Yamaguchi, William J. Munro, Shiro Saito

Year

2014

Paper ID

45960

Status

Preprint

Abstract Read

~2 min

Abstract Words

99

Citations

N/A

Abstract

Recently, there have been significant developments in entanglement-based quantum metrology. However, entanglement is fragile against experimental imperfections, and quantum sensing to beat the standard quantum limit in scaling has not yet been achieved in realistic systems. Here, we show that it is possible to overcome such restrictions so that one can sense a magnetic field with an accuracy beyond the standard quantum limit even under the effect of decoherence, by using a realistic entangled state that can be easily created even with current technology. Our scheme could pave the way for the realizations of practical entanglement-based magnetic field sensors.

Why This Paper Matters

  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2014 reference point for readers tracking recent quantum research.
  • Recently, there have been significant developments in entanglement-based quantum metrology.

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