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Q: Fachverband Quantenoptik und Photonik

Q 2: Quanteninformation (Photonen und nichtklassisches Licht I)

Q 2.8: Vortrag

Montag, 19. März 2007, 12:15–12:30, 5L

Quantum reconstruction of the Q-function of an intense polarization squeezed state — •Christoph Marquardt¹, Joel Heersink¹, Ruifang Dong¹, Maria Chekhova², Andrei Klimov³, Luis Sanchez-Soto⁴, Ulrik 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, M.V. Lomonosov Moscow 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

Quantum state reconstruction is an important tool to verify the properties of various quantum states [1]. We present an exact reconstruction formula of the polarization sector of the density matrix, starting from a complete set of Stokes parameters measurements. By using the Q-function as an appropriate quasidistribution and in the case of intense polarization states we show that the reconstruction reduces to an inverse Radon transform. We reconstructed the Q-function of an intense polarization squeezed state, generated by fs-pulses in an optical fiber exploiting the nonlinear Kerr effect [2].

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

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