Issue |
EPL
Volume 87, Number 4, August 2009
|
|
---|---|---|
Article Number | 40003 | |
Number of page(s) | 6 | |
Section | General | |
DOI | https://doi.org/10.1209/0295-5075/87/40003 | |
Published online | 07 September 2009 |
Optimal control approach to dynamical suppression of decoherence of a qubit
LPMMC, C.N.R.S., Université Joseph Fourier - BP 166, 38042 Grenoble-cedex 9, France, EU
Corresponding author: hjirari@hotmail.com
Received:
7
April
2009
Accepted:
28
July
2009
We investigate optimal control of a single qubit coupled to an ohmic heat bath. For the weak bath coupling regime, we derive a Bloch-Redfield master equation describing the evolution of the qubit state parameterized by vectors in the Bloch sphere. By use of the optimal control methodology, we determine a field that generates a single-qubit rotation. We use techniques of automatic differentiation to compute the gradient for the cost functional.
PACS: 02.30.Yy – Control theory / 03.67.-a – Quantum information / 03.65.Yz – Decoherence; open systems; quantum statistical methods
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.