منابع مشابه
Measuring the spectrum of colored noise by dynamical decoupling.
Decoherence is one of the most important obstacles that must be overcome in quantum information processing. It depends on the qubit-environment coupling strength, but also on the spectral composition of the noise generated by the environment. If the spectral density is known, fighting the effect of decoherence can be made more effective. Applying sequences of inversion pulses to the qubit syste...
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Stabilization of dynamics of a system is of great concern to the researchers and practitioners over the years. It is observed that the system is more viscous if one adds a noise in the system. In the present situation the system is perturbed by a (multiplicative) noise and the stable/unstable behavior is examined. It is then observed, one can stabilize or destablize a large class of (autonomous...
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Realistic quantum computing is subject to noise. Therefore, an important frontier in quantum computing is to implement noise-resilient quantum control over qubits. At the same time, dynamical decoupling can protect the coherence of qubits. Here we demonstrate non-trivial quantum evolution steered by dynamical decoupling control, which simultaneously suppresses noise effects. We design and imple...
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Recent studies have shown that applying a sequence of Hahn spin-echo pulses to a qubit system at judiciously chosen intervals can, in certain noise environments, greatly improve the suppression of phase errors compared to traditional dynamical decoupling approaches. By enforcing a simple analytical condition, we obtain sets of dynamical decoupling sequences that are designed for optimized noise...
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The application of dynamical decoupling pulses to a single qubit interacting with a linear harmonic oscillator bath with 1/f ~more generally, strong low-frequency! spectral density is studied, and compared to the Ohmic case. Decoupling pulses that are slower than the fastest bath time scale are shown to drastically reduce the decoherence rate in the 1/f case. Contrary to conclusions drawn from ...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2011
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.107.230501