Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Single-shot adaptive measurement for quantum-enhanced metrology

[+] Author Affiliations
Pantita Palittpongarnpim, Barry C. Sanders

Univ. of Calgary (Canada)

Peter Wittek

ICFO - Institut de Ciències Fotòniques (Spain)

Proc. SPIE 9980, Quantum Communications and Quantum Imaging XIV, 99800H (September 13, 2016); doi:10.1117/12.2237355
Text Size: A A A
From Conference Volume 9980

  • Quantum Communications and Quantum Imaging XIV
  • Ronald E. Meyers; Yanhua Shih; Keith S. Deacon
  • San Diego, California, United States | August 28, 2016

abstract

Quantum-enhanced metrology aims to estimate an unknown parameter such that the precision scales better than the shot-noise bound. Single-shot adaptive quantum-enhanced metrology (AQEM) is a promising approach that uses feedback to tweak the quantum process according to previous measurement outcomes. Techniques and formalism for the adaptive case are quite different from the usual non-adaptive quantum metrology approach due to the causal relationship between measurements and outcomes. We construct a formal framework for AQEM by modeling the procedure as a decision-making process, and we derive the imprecision and the Cram´er- Rao lower bound with explicit dependence on the feedback policy. We also explain the reinforcement learning approach for generating quantum control policies, which is adopted due to the optimal policy being non-trivial to devise. Applying a learning algorithm based on differential evolution enables us to attain imprecision for adaptive interferometric phase estimation, which turns out to be SQL when non-entangled particles are used in the scheme. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Pantita Palittpongarnpim ; Peter Wittek and Barry C. Sanders
" Single-shot adaptive measurement for quantum-enhanced metrology ", Proc. SPIE 9980, Quantum Communications and Quantum Imaging XIV, 99800H (September 13, 2016); doi:10.1117/12.2237355; http://dx.doi.org/10.1117/12.2237355


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


 

  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.