Surpassing the standard quantum limit for optical imaging using nonclassical multimode light.

@article{Treps2002SurpassingTS,
  title={Surpassing the standard quantum limit for optical imaging using nonclassical multimode light.},
  author={Nicolas Treps and Ulrik Lund Andersen and Ben C. Buchler and Ping Koy Lam and Agn{\`e}s Ma{\^i}tre and Hans-A. Bachor and Claude Fabre},
  journal={Physical review letters},
  year={2002},
  volume={88 20},
  pages={
          203601
        }
}
Using continuous wave superposition of spatial modes, we demonstrate experimentally displacement measurement of a light beam below the standard quantum limit. Multimode squeezed light is obtained by mixing a vacuum squeezed beam and a coherent beam that are spatially orthogonal. Although the resultant beam is not squeezed, it is shown to have strong internal spatial correlations. We show that the position of such a light beam can be measured using a split detector with an increased precision… 

Figures from this paper

Nano-displacement measurements using spatially multimode squeezed light

We demonstrate the possibility of surpassing the quantum noise limit for simultaneous multi-axis spatial displacement measurements that have zero mean values. The requisite resources for these

Optimal optical measurement of small displacements

We derive the quantum noise limit for the optical beam displacement of a TEM00 mode. Using a multimodal analysis, we show that the conventional split detection scheme for measuring beam displacement

Spatial quantum effects with continuous-wave laser beams

The application of quantum optics to spatial measurements with continuous-wave laser beams is discussed. In particular, we summarize the work on measuring small displacements and tilt. We present the

Teaching a laser beam to go straight

In classical physics a beam of light propagates in a perfectly straight line and this means that we can measure small displacements with unlimited accuracy. However, this is not correct for real

Imaging using quantum noise properties of light

We show that it is possible to estimate the shape of an object by measuring only the fluctuations of a probing field, allowing us to expose the object to a minimal light intensity. This scheme, based

A Quantum Laser Pointer

TLDR
A quantum laser pointer is experimentally produced, a beam of light whose direction is measured with a precision greater than that possible for a usual laser beam, providing a demonstration of multichannel spatial squeezing and its application to the improvement of beam positioning sensitivity and, more generally, to imaging.

Two-color bright squeezed vacuum

In a strongly pumped nondegenerate traveling-wave optical parametric amplifier, we produce a two-color squeezed vacuum with up to millions of photons per pulse. Our approach to registering this

Controlling local quantum fluctuations of light using four-wave mixing in an atomic vapour

The spatial character of the noise on a light field affects its usefulness for imaging. Multi-spatial-mode (MSM) squeezed light has noise below the quantum noise limit in multiple spatial modes, and

Quantum imaging beyond the diffraction limit by optical centroid measurements.

  • M. Tsang
  • Physics
    Physical review letters
  • 2009
I propose a quantum imaging method that can beat the Rayleigh-Abbe diffraction limit and achieve de Broglie resolution without requiring a multiphoton absorber or coincidence detection. Using the

Experimental Demonstration of a Displacement Measurement of an Optical Beam beyond the Quantum Noise Limit

We experimentally generate a spatially squeezed light beam and realize a small-displacement measurement beyond the quantum noise limit with this squeezed light. Moreover, we measure about −2.2±0.2 dB
...

References

Surpassing the standard quantum limit for optical imaging using nonclassical multimode light

  • Physical Review Letters
  • 2002