Related papers: Coherent Quantum Control to Arbitrary Accuracy usi…
This paper has been withdrawn by the authors due to a fatal flaw in the central proof.
This paper has been withdrawn by the authors because it was just an early submission of quant-ph/0308133 with the wrong title. Sorry.
This paper has been withdrawn by the author due to a error in attachment of source file.
This paper has been withdrawn by the author due to a crucial error in the formulation.
This paper has been withdrawn by the authors, due a oversimplified decoherence model. It will be substituted by a new work.
This paper has been withdrawn by the author due to an apparent misunderstanding of quantum feedback control.
This paper has been withdrawn by the authors due to a crucial error.
This paper has been withdrawn as it has been superseded by postings arXiv:quant-ph/0702147 and arXiv:0712.2935
This paper has been withdrawn by the authors, due an error involving the weak* convergence argument in section 2
The paper has been withdrawn by the autors. The proposed code is not working because orthogonality.
The ultimate accuracy as regards controlling a qubit with a coherent field is studied in terms of degradation of the fidelity by employing a fully quantum mechanical treatment. While the fidelity error accompanied by pi/2 pulse control is…
Reliable long-time storage of arbitrary quantum states is a key element for quantum information processing. In order to dynamically decouple a spin or quantum bit from a dephasing environment, we introduce an optimized sequence of $N$…
In this manuscript we address the problem of deriving \emph{analytic} expressions for calculating universal decoherence-induced errors in qubits undergoing arbitrary, unitary, time-dependent quantum-control protocols. For a qubit undergoing…
This paper has been withdrawn by the author due to a crucial error in the submission action.
This paper has been withdrawn due to crucial erros in equations (24)--(31).
This paper was withdrawn by the author. It turns out that similar ideas have been presented before. The author apologizes.
This paper has been withdrawn due to a crucial theoretical error.
This paper was withdrawn (temporarily?) by the author since an error needs to be corrected.
The coherent control of small quantum system is considered. For a two-level system coupled to an arbitrary bath we consider a pulse of finite duration. We derive the leading and the next-leading order corrections to the evolution operator…
This paper has been withdrawn by the authors due to an error first noted by M. Lukin.