Quantum illumination with Gaussian states.

  title={Quantum illumination with Gaussian states.},
  author={Si-Hui Tan and Baris I. Erkmen and Vittorio Giovannetti and Saikat Guha and Seth Lloyd and Lorenzo Maccone and Stefano Pirandola and Jeffrey H. Shapiro},
  journal={Physical review letters},
  volume={101 25},
An optical transmitter irradiates a target region containing a bright thermal-noise bath in which a low-reflectivity object might be embedded. The light received from this region is used to decide whether the object is present or absent. The performance achieved using a coherent-state transmitter is compared with that of a quantum-illumination transmitter, i.e., one that employs the signal beam obtained from spontaneous parametric down-conversion. By making the optimum joint measurement on the… 

Figures from this paper

Fundamental limits of quantum illumination

In Quantum Illumination (QI), a signal beam initially entangled with an idler beam held at the receiver interrogates a target region bathed in thermal background light, and the returned beam is

Microwave quantum illumination with a digital phase-conjugated receiver

Quantum illumination is a sensing technique that employs entangled signal-idler beams to improve the detection efficiency of low-reflectivity objects in environments with large thermal noise. The

Quantum illumination with a parametrically amplified idler

Quantum Estimation Methods for Quantum Illumination.

This approach employs the quantum Fisher information to provide an upper bound for the error probability, supplies the concrete estimator saturating the bound, and extends the quantum illumination protocol to non-Gaussian states and shows how Schrödinger's cat states may be used for quantum illumination.

Noisy Receivers for Quantum Illumination

Quantum illumination (QI) promises unprecedented performances in target detection, but there are various problems surrounding its implementation. Where target ranging is a concern, signal and idler

Receiver design to harness quantum illumination advantage

  • S. Guha
  • Physics
    2009 IEEE International Symposium on Information Theory
  • 2009
This work presents an explicit design of a structured quantum-illumination receiver, which in conjunction with the SPDC transmitter is shown to achieve up to a 3 dB error-exponent advantage over the classical sensor.

Target detection through quantum illumination

Classical target detection can suffer large error probabilities in noisy and lossy environments when noise photons are mistaken for signal photons reflected from an object. It has been shown

Microwave quantum illumination using a digital receiver

This work generates entangled fields to illuminate a room-temperature object at a distance of 1 m in a free-space detection setup and implements a digital phase-conjugate receiver based on linear quadrature measurements that outperforms a symmetric classical noise radar in the same conditions, despite the entanglement-breaking signal path.

Target Detection of Quantum Illumination Receiver Based on Photon-subtracted Entanglement State

We theoretically propose a quantum illumination receiver based on the ideal photon-subtracted two-mode squeezed state (PSTMSS) to efficiently detect the noise-hidden target. This receiver is

Gaussian state-based quantum illumination with simple photodetection.

The continuous-variable Gaussian quantum information formalism is used to show that quantum illumination is better for object detection compared with coherent states of the same mean photon number, even for simple direct photodetection.



Science 321

  • 1463
  • 2008

Laser Phys

  • 16, 1517
  • 2006


  • Rev. Lett. 67, 661
  • 1991

For κ ≪ 1 there is very little difference in the â † Bâ B values under H0 and H1. These values ensure that a non-vacuum transmitter must be used to detect target presence


    • Rev. A 78, 012331
    • 2008


    • Rev. A 70, 032315
    • 2004

    Science 306

    • 1330
    • 2004

    ‡ Electronic address: jhs@mit


      • Rev. A 71, 062340 (2005); M. F. Sacchi, Phys. Rev. A 72, 014305
      • 2005