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Quantum Information Processing
Erschienen in: Quantum Information Processing 4/2019

01.04.2019

Optimal control methods for quantum gate preparation: a comparative study

verfasst von: Bilal Riaz, Cong Shuang, Shahid Qamar

Erschienen in: Quantum Information Processing | Ausgabe 4/2019

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Abstract

In this study, optimal control methods for quantum gate preparation are investigated. Quantum computation demands very high fidelity and requires controls to be easily tunable to achieve different computational tasks. Here, NOT and Controlled-NOT gates are prepared using four optimal control approaches on single- and two-qubit spin systems. Techniques we employed and compared are Krotov method, gradient ascent pulse engineering (GRAPE), chopped random basis optimization (CRAB) and gradient optimization of analytic controls (GOAT). For the preparation of NOT gate both unitary and Lindbladian dynamics are considered. From the numerical simulations, it is observed that GOAT achieves better results as compared to Krotov, GRAPE and CRAB, in terms of minimum infidelity, algorithmic simplicity and analyticity.
Vorheriger Artikel Entanglement-assisted quantum error-correcting codes over arbitrary finite fields
Nächster Artikel Enhancing estimation precision of parameter for a two-level atom with circular motion

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Metadaten
Titel
Optimal control methods for quantum gate preparation: a comparative study
verfasst von
Bilal Riaz
Cong Shuang
Shahid Qamar
Publikationsdatum
01.04.2019
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 4/2019
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-019-2190-0

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