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Q: Quantenoptik und Photonik

Q 63: Quanteninformation V

Q 63.5: Talk

Thursday, March 16, 2006, 15:00–15:15, HVI

Quantum state reconstruction of an intense polarization squeezed state — •Christoph Marquardt¹, Joel Heersink¹, Maria V. Chekhova², Andrei B. Klimov³, Luis L. Sanchez-Soto⁴, Ulrik L. Andersen¹, and Gerd Leuchs¹ — ¹Institute for Optics, Information and Photonics, Max-Planck Research Group, Universität Erlangen-Nürnberg, Günther-Scharowsky-Str. 1 / Bau 24, 91058 Erlangen — ²Department of Physics, Moscow M.V. Lomonosov State University, 119992 Moscow, Russia — ³Departamento de Física, Universidad de Guadalajara,*Revolución 1500, 44420 Guadalajara, Jalisco, Mexico — ⁴Departamento de Optica, Facultad de Física, Universidad Complutense, 28040 Madrid, Spain

By reconstructing the density matrix or Wigner function, one gains full information about a given quantum state. Such reconstructions have been shown for various quantum systems[1]. We use a source of intense polarization squeezed fs-pulses which are generated inside an optical fiber exploiting the nonlinear Kerr effect[2]. For these states Stokes measurements for various angles of the Poincaree sphere were performed. To reconstruct the Wigner function one has to take into account the algebraic properties of the quantum Stokes operators. We report on the reconstruction of such a Wigner function from experimental data.

[1] A.I.Lvovsky, M.G.Raymer, quant-ph/0511044

[2] J. Heersink et al., Opt. Lett. 30, 1192 (2005)