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arXiv · 1209.5568

Quantum State Preparation by Controlled Dissipation in Finite Time: From Classical to Quantum Controllers

Giacomo Baggio·Francesco Ticozzi·Lorenza Viola
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Abstract

We propose a general scheme for dissipatively preparing arbitrary pure quantum states on a multipartite qubit register in a finite number of basic control blocks. Our "splitting-subspace" approach relies on control resources that are available in a number of scalable quantum technologies (complete unitary control on the target system, an ancillary resettable qubit and controlled-not gates between the target and the ancilla), and can be seen as a "quantum-controller" implementation of a sequence of classical feedback loops. We show how a large degree of flexibility exists in engineering the required conditional operations, and make explicit contact with a stabilization protocol used for dissipative quantum state preparation and entanglement generation in recent experiments with trapped ions.

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Giacomo Baggio, Francesco Ticozzi, Lorenza Viola. 2012-09-25. Quantum State Preparation by Controlled Dissipation in Finite Time: From Classical to Quantum Controllers. https://doi.org/10.1109/cdc.2012.6426787

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