PIRSA:08080053 Conference

DOI10.48660/08080053

Conference/School: Quantum Estimation: Theory and Practice - 2008

Chekhova, M. (2008). Polarisation tomography of macro- and mesoscopic quantum states of light. Perimeter Institute. https://pirsa.org/08080053

Chekhova, Maria. Polarisation tomography of macro- and mesoscopic quantum states of light. Perimeter Institute, Aug. 29, 2008, https://pirsa.org/08080053 

@misc{ pirsa_PIRSA:08080053,
  doi = {10.48660/08080053},
  url = {https://pirsa.org/08080053},
  author = {Chekhova, Maria},
  keywords = {},
  language = {en},
  title = {Polarisation tomography of macro- and mesoscopic quantum states of light},
  publisher = {Perimeter Institute},
  year = {2008},
  month = {aug},
  note = {PIRSA:08080053 see, \url{https://pirsa.org}}
}

Abstract

We report an experiment on reconstructing the quantum state of bright (macroscopic) polarization-squeezed light generated in a birefringent (polarization-maintaining) fibre due to the Kerr nonlinearity. The nonlinearity acts on both H and V polarization components, producing quadrature squeezing; by controlling the phase shift between the H and V components one can make the state squeezed in any Stokes observable. The tomography is performed by measuring histograms for a series of Stokes observables, and the resulting histograms (tomograms) are processed in a way similar to the classical 3D Radon transformation. At the output, we obtain the polarization Q-function, which in the case of large photon numbers coincides with the polarization W-function. An interesting extension of the performed experiment will be going down to lower photon numbers (mesoscopic quantum states), and we expect a different behaviour of polarization W and Q functions in this case. An experiment on producing such states is discussed.

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