Spin-echo entanglement protection from random telegraph noise

Abstract

We analyze local spin-echo procedures to protect entanglement between two non-interacting qubits, each subject to pure-dephasing random telegraph noise. For superconducting qubits this simple model captures characteristic features of the effect of bistable impurities coupled to the device. An analytic expression for the entanglement dynamics is reported. Peculiar features related to the non-Gaussian nature of the noise already observed in the single qubit dynamics also occur in the entanglement dynamics for proper values of the ratio $g=v/\gamma$, between the qubit-impurity coupling strength and the switching rate of the random telegraph process, and of the separation between the pulses $\Delta t$. We find that the echo procedure may delay the disappearance of entanglement, cancel the dynamical structure of entanglement revivals and dark periods, and induce peculiar plateau-like behaviors of the concurrence.

9 pages, 2 figures

References in corpus (39)

• Entanglement of Formation of an Arbitrary State of Two Qubits
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Dynamical Decoupling of Open Quantum Systems
• The classical-quantum boundary for correlations: discord and related measures
• Dynamical suppression of decoherence in two-state quantum systems
• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• NMR Techniques for Quantum Control and Computation
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Sudden Death of Entanglement
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Non-Markovian effects on the dynamics of entanglement
• Optimized Dynamical Decoupling in a Model Quantum Memory
• Decoherence in a superconducting quantum bit circuit
• Sudden Birth Versus Sudden Death of Entanglement in Multipartite Systems
• Decoherence and 1/f noise in Josephson qubits
• Charge echo in a Cooper-pair box
• Dynamics of quantum correlations in two-qubit systems within non-Markovian environments
• 1/f Flux Noise in Josephson Phase Qubits
• Revival of quantum correlations without system-environment back-action
• Low-frequency noise as a source of dephasing of a qubit
• Non-Gaussian low-frequency noise as a source of qubit decoherence
• Dephasing of a superconducting flux qubit
• Decoherence in qubits due to low-frequency noise
• Experimental Uhrig Dynamical Decoupling using Trapped Ions
• Initial decoherence in solid state qubits
• Dynamical suppression of telegraph and 1/f noise due to quantum bistable fluctuator
• Protection of quantum systems by nested dynamical decoupling
• Geometrical dependence of low frequency noise in superconducting flux qubits
• Entanglement dynamics in superconducting qubits affected by local bistable impurities
• Entanglement degradation in the solid state: interplay of adiabatic and quantum noise
• Protecting unknown two-qubit entangled states by nesting Uhrig's dynamical decoupling sequences
• Long-time Protection of Nonlocal Entanglement
• Dynamical decoupling and dephasing in interacting two-level systems
• Correlated flux noise and decoherence in two inductively coupled flux qubits
• Optimal tuning of solid-state quantum gates: A universal two-qubit gate
• Decoherence times of universal two-qubit gates in the presence of broad-band noise
• Saving Entanglement via a Nonuniform Sequence of $\pi$ Pulses
• Optimal operating conditions of an entangling two-transmon gate
• Optimized experimental settings for the best detection of quantum nonlocality

Cited by in corpus (6)

• Cavity-based architecture to preserve quantum coherence and entanglement
• Overview on the phenomenon of two-qubit entanglement revivals in classical environments
• Practical techniques for high-precision measurements on near-term quantum hardware and applications in molecular energy estimation
• Open-loop quantum control of small-size networks for high-order cumulants and cross-correlations sensing
• Comparison of Perfect and Quasi Werner States
• Quantum enhancement of qutrit dynamics through driving field and photonic band-gap crystal