Robust two-qubit quantum registers
arXiv:cond-mat/0312349 · doi:10.1103/PhysRevLett.94.040506
Abstract
We carry out a systematic analysis of a pair of coupled qubits, each of which is subject to its own dissipative environment, and argue that a combination of the inter-qubit couplings which provides for the lowest possible decoherence rates corresponds to the incidence of a double spectral degeneracy in the two-qubit system. We support this general argument by the results of of an evolutionary genetic algorithm which can also be used for optimizing time-dependent processes (gates) and their sequences that implement various quantum computing protocols.
Latex, 4 pages, 4 figures, colored figures, accepted for publishing in PRL
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Cited by in corpus (15)
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- Controllability of open quantum systems with Kraus-map dynamics
- Correlation-induced suppression of decoherence in capacitively coupled Cooper-pair boxes
- Environment-invariant measure of distance between evolutions of an open quantum system
- Strong and weak coupling of two coupled qubits
- Optimized design of universal two-qubit gates
- Fidelity of optimally controlled quantum gates with randomly coupled multiparticle environments
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- Asymmetric coupling between two quantum emitters
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- Effect of system level structure and spectral distribution of the environment on the decoherence rate
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- A Chain-Boson Model for the Decoherence and Relaxation of a Few Coupled SQUIDs in a Phonon Bath
- Some aspects of the interplay between bipartite correlations and quantum channels