Berlin 2015 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 49: Quantum information systems: mostly concepts (with TT)
HL 49.4: Talk
Wednesday, March 18, 2015, 11:45–12:00, EW 202
Temporal shaping of Gaussian single photon pulses — •Emanuel Peinke1, Gaston Hornecker2, Julien Claudon1, Alexia Auffèves2, and Jean-Michel Gérard1 — 1CEA/CNRS joint team "Nanophysics and Semiconductors", INAC, CEA and Université Grenoble Alpes, Grenoble, France — 2CEA/CNRS joint team "Nanophysics and Semiconductors", Institut Néel, CNRS and Université Grenoble Alpes, Grenoble, France
Single photon pulses with a Gaussian temporal envelope constitute an important resource for optical quantum information processing [1]. We propose here a scheme to shape single photon pulses with high fidelity using a two-level emitter (e.g. a quantum dot (QD)) coupled to a frequency-tunable microcavity. By controlling the cavity resonance frequency on a time-scale shorter than the typical emitter spontaneous emission time, one controls the instantaneous emission rate and thus the temporal envelope of the emitted photon. For realistic experimental parameters, we show that nearly ideal Gaussian pulses can be generated with QD-semiconductor systems and superconducting Josephson circuits.
[1] P. P. Rohde, T. C. Ralph, and M. A. Nielsen. Optimal photons for quantum- information processing. Phys. Rev. A, 72:052332, Nov 2005.