Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 55: Poster II

Q 55.40: Poster

Thursday, March 11, 2010, 16:00–19:00, Lichthof

Correction of Phase Damping Errors — •Benjamin Trendelkamp-Schroer, Julius Helm, and Walter T. Strunz — TU Dresden

We study a phase damping channel arising from a quantum optical experiment and focus on the question of how to correct phase errors. These errors allow for a complete correction if and only if the corresponding channel is of random unitary type, i.e., a convex combination of unitary transformations [1]. A successful correction, however, requires sound knowledge of both the system and its dynamics. In this context the role of random unitary versus quantum decoherence will be elucidated.

[1] M. Gregoratti and R.F. Werner, J. Mod. Opt. 50, 915 (2002)