Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.85.012315
Title: Decoherence control: Universal protection of two-qubit states and two-qubit gates using continuous driving fields
Authors: Chaudhry, A.Z.
Gong, J. 
Issue Date: 18-Jan-2012
Citation: Chaudhry, A.Z., Gong, J. (2012-01-18). Decoherence control: Universal protection of two-qubit states and two-qubit gates using continuous driving fields. Physical Review A - Atomic, Molecular, and Optical Physics 85 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.85.012315
Abstract: A field configuration utilizing local static fields and a few continuous-wave driving fields is constructed to achieve universal (but low-order) protection of two-qubit states. That is, two-qubit states can be protected against arbitrary system-environment coupling with control fields if their frequencies are sufficiently large as compared with the cutoff frequency of the environment. Equally important, we show that it is possible to construct driving fields to protect two-qubit entangling gates against decoherence, without assuming any particular form of system-environment coupling. Using a non-Markovian master equation, we further demonstrate the effectiveness of our continuous dynamical decoupling fields in protecting entanglement and the excellent performance of protected two-qubit gates in generating entanglement. The results are complementary to current studies of entanglement protection using universal dynamical decoupling pulse sequences. © 2012 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/96150
ISSN: 10502947
DOI: 10.1103/PhysRevA.85.012315
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