07.01.2016
Ömer Bayraktar KTH Stockholm, Sweden
Organizer: Gerd Leuchs (MPL) Speaker: Ömer Bayraktar KTH Stockholm, Sweden Title: Nphoton, twomode quantum state tomography
Abstract: Quantum physics dictates the fundamental impossibility of determining the polarizationstate of a single photon [1]. However, applying a series of measurements in different bases on identical copies of the state, i.e., performing quantum state tomography, the quantum state may be estimated [2]. Within this project the possibility of estimating the quantum state of N photons distributed in two polarization modes in a setup without movable components is investigated and a proofofprinciple for the case N = 2 is demonstrated. Therefore, a source for photon pairs is setup and characterized in various experiments, e.g., twophoton interference and violation of the CHSH version of Bell’s inequality. Afterwards, existing methods of twoqubit quantum state tomography are employed. Finally, these methods are combined with the equations for Nphoton, twomode tomography in order to demonstrate the new tomography scheme. This method is expected to reduce the complexity of future quantum state detection systems.
Bibliography: [1] A. Peres, Quantum Theory: Concepts and Methods, Springer Netherlands, 2002. [2] J.B. Altepeter, et al., Adv. At. Mol. Opt. Phys. 52, 105–159 (2005) Time and Place January 7th at 15:00 Large seminar room (429/435)
