Bang-Bang control of a qubit coupled to a quantum critical spin bath
arXiv:0802.2859 · doi:10.1103/PhysRevA.77.052112
Abstract
We analytically and numerically study the effects of pulsed control on the decoherence of a qubit coupled to a quantum spin bath. When the environment is critical, decoherence is faster and we show that the control is relatively more effective. Two coupling models are investigated, namely a qubit coupled to a bath via a single link and a spin star model, yielding results that are similar and consistent.
10 pages, 4 figures, replaced with published version
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Cited by in corpus (9)
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- From Zeno to anti-Zeno: decoherence-control dependence on the quantum statistics of the bath
- Decoherence from spin environments: Loschmidt echo and quasiparticle excitations
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- Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure
- Negativity of quantumness and non-Markovianity in a qubit coupled to a thermal Ising spin bath system
- Decoherence of Bell states by local interactions with a suddenly quenched spin environment
- Decoherence-assisted transport and quantum criticalities