Regensburg 2007 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Poster I

DY 24.9: Poster

Wednesday, March 28, 2007, 16:00–18:00, Poster D

Cyclical Algorithmic Cooling — •Florian Rempp and Günter Mahler — 1. Institut für Theoretische Physik, Universität Stuttgart, Deutschland

Algorithmic cooling is a method to obtain highly polarized spins in a spin system, without cooling down the environment. We introduce a system to perform the cooling algorithm, first presented by Tal Mor et al. in 2002 [1], multiple times on the same set of qbits. we achieve this goal by adding an additional SWAP-gate and a bath contact to the algorithm.

In order to compute the state of the spins after an arbitrary application of the algorithm we introduce a thermalisation super operator to need not to solve the Liouville von Neumann equation for the bath contact for each application step. furthermore we draw a connection to general thermodynamic machines in order to locate algorithmic cooling in a bigger context.

[1] Tal Mor, P. Oscar Boykin, Vwani Roychowdhury, Farrokh Vatan and Rutger Vrijen, "Algoritmic Cooling and Scalable NMR Quantum Computers", Proc. Natl. Acad. Sci. USA, 99:3388-3393, 2002