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Quantum Chaos and Quantum Algorithms

Daniel Braun
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Abstract

It was recently shown (quant-ph/9909074) that parasitic random interactions between the qubits in a quantum computer can induce quantum chaos and put into question the operability of a quantum computer. In this work I investigate whether already the interactions between the qubits introduced with the intention to operate the quantum computer may lead to quantum chaos. The analysis focuses on two well--known quantum algorithms, namely Grover's search algorithm and the quantum Fourier transform. I show that in both cases the same very unusual combination of signatures from chaotic and from integrable dynamics arises.

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Daniel Braun. 2001-10-05. Quantum Chaos and Quantum Algorithms. https://doi.org/10.1103/physreva.65.042317

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