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- Title
Various methods of optimizing control pulses for quantum systems with decoherence.
- Authors
Pawela, Łukasz; Sadowski, Przemysław
- Abstract
We design control setting that allows the implementation of an approximation of an unitary operation of a quantum system under decoherence using various quantum system layouts and numerical algorithms. We focus our attention on the possibility of adding ancillary qubits which help to achieve a desired quantum map on the initial system. Furthermore, we use three methods of optimizing the control pulses: genetic optimization, approximate evolution method and approximate gradient method. To model the noise in the system we use the Lindblad equation. We obtain results showing that applying the control pulses to the ancilla allows one to successfully implement unitary operation on a target system in the presence of noise, which is not possible which control field applied to the system qubits.
- Subjects
DECOHERENCE (Quantum mechanics); QUANTUM mechanics; UNITARY operators; QUBITS
- Publication
Quantum Information Processing, 2016, Vol 15, Issue 5, p1937
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-016-1242-y