Quantum metrology with one-dimensional superradiant photonic states

V. Paulisch, M. Perarnau-Llobet, A. González-Tudela, and J. I. Cirac
Phys. Rev. A 99, 043807 – Published 8 April 2019

Abstract

Photonic states with large and fixed photon numbers, such as Fock states, enable quantum-enhanced metrology but remain an experimentally elusive resource. A potentially simple, deterministic, and scalable way to generate these states consists of fully exciting N quantum emitters equally coupled to a common photonic reservoir, which leads to a collective decay known as Dicke superradiance. The emitted N-photon state turns out to be a highly entangled multimode state, and to characterize its metrological properties in this work we (i) develop theoretical tools to compute the quantum Fisher information of general multimode photonic states, (ii) use it to show that Dicke superradiant photons in one-dimensional waveguides achieve Heisenberg scaling, which can be saturated by a parity measurement, and (iii) study the robustness of these states to experimental limitations in state-of-the-art atom-waveguide QED setups.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 23 May 2018
  • Revised 17 September 2018

DOI:https://doi.org/10.1103/PhysRevA.99.043807

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

V. Paulisch1,*, M. Perarnau-Llobet1,*, A. González-Tudela1,2,†, and J. I. Cirac1

  • 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
  • 2Instituto de Física Fundamental IFF-CSIC, Calle Serrano 113b, Madrid 28006, Spain

  • *These authors contributed equally to this work.
  • a.gonzalez.tudela@csic.es

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 4 — April 2019

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
×