Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics II

Q 31.35: Poster

Dienstag, 24. März 2015, 17:00–19:00, C/Foyer

Protecting an optical qudit against photon loss — •Marcel Bergmann and Peter van Loock — Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, D-55128 Mainz

We present a new class of quantum error correcting codes for the amplitude damping channel. First, using sources of so-called NOON states and linear optics, a systematic way to obtain quantum codes for the loss-tolerant encoding of an arbitrary qubit into multimode bosonic systems is introduced. We compare our codes to existing loss codes with regards to their scaling and their resource consumption (total number of photons and modes). Our method is then shown to be easily extendible to the case of an arbitrary qudit. Finally, we explicitly propose a scheme for the experimental generation of a four-photon qubit code entirely based on linear optics, with the two-photon NOON-state resources corresponding to the well-known Hong-Ou-Mandel states, which are easily obtainable from pairs of single photons combined at a beam splitter.