Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 58: Transport: Poster Session

TT 58.20: Poster

Mittwoch, 9. März 2016, 15:00–18:30, Poster D

Implementation of Quantum Stochastic Walks — •Peter Schuhmacher, Luke Govia, Bruno Taketani, and Frank Wilhelm — Universität des Saarlandes

Quantum walks are one of the most prominent frameworks in which to design and think about quantum algorithms. Both the continuous- and discrete-time versions have been shown to provide speed-up over classical information processing tasks , and can be regarded as universal quantum computers. Classical (probabilistic) and quantum unitary random walks yield different distributions due to interference effects. Combining the two, stochastic quantum walks (QSW) can be defined in an axiomatic manner to include unitary and non-unitary effects, and include both classical and quantum walks as limiting cases [1]. While a general purpose quantum computer is still far over the horizon, intermediary technologies have been emerging with the promise to breach classical limitations. Within these, artificial intelligence is one exciting field where the use of quantum physics can lead to important improvements [2]. Here, we focus on the physical realizability of both kinds of quantum stochastic walks (continuous-time and discrete-time).

[1] J. D. Whitfield, C. A. Rodríguez-Rosario and A. Aspuru-Guzik,

PRA 81, 022323 (2010).

[2] H. J. Briegel & G. De las Cuevas, Scientific Reports, 400 (2012).