Sequential quantum-enhanced measurement with an atomic ensemble

A. V. Lebedev, P. Treutlein, and G. Blatter
Phys. Rev. A 89, 012118 – Published 21 January 2014

Abstract

We propose a quantum-enhanced iterative (with K steps) measurement scheme based on an ensemble of N two-level probes which asymptotically approaches the Heisenberg limit δKRK/(K+1), where R is the number of quantum resources. The protocol is inspired by Kitaev's phase estimation algorithm and involves only collective manipulation and measurement of the ensemble. The iterative procedure takes the shot-noise-limited primary measurement with precision δ1N1/2 to increasingly precise results, δKNK/2. We propose an implementation of the algorithm for the measurement of a magnetic field using a two-component atomic cloud of bosons.

  • Figure
  • Received 17 April 2013

DOI:https://doi.org/10.1103/PhysRevA.89.012118

©2014 American Physical Society

Authors & Affiliations

A. V. Lebedev1,*, P. Treutlein2, and G. Blatter1

  • 1Theoretische Physik, Wolfgang-Pauli-Strasse 27, ETH Zurich, CH-8093 Zürich, Switzerland
  • 2Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

  • *lebedev@itp.phys.ethz.ch

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 89, Iss. 1 — January 2014

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×