Decoherence control: Universal protection of two-qubit states and two-qubit gates using continuous driving fields

Abstract

A field configuration utilizing local static and oscillating 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 if the driving field frequency, as compared with the cutoff frequency of the environment, is sufficiently large. 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.

16 pages, 6 figures (improved introduction, made connections with early studies of dynamically corrected quantum gates)

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Cited by in corpus (18)

• Coherence-protected Quantum Gate by Continuous Dynamical Decoupling in Diamond
• Protecting entanglement by adjusting the velocities of moving qubits inside non-Markovian environments
• Nanoscale electrometry based on a magnetic-field-resistant spin sensor
• Exact non-Markovian master equations for multiple qubit systems: quantum trajectory approach
• Synthetic clock transitions via continuous dynamical decoupling
• Finite-time Landau-Zener processes and counter-diabatic driving in open systems: beyond Born, Markov and Rotating-wave approximations
• Robust quantum gates for stochastic time-varying noise
• Protecting and Enhancing Spin Squeezing via Continuous Dynamical Decoupling
• Control relaxation via dephasing: an exact quantum state diffusion study
• Entanglement dynamics of an arbitrary number of moving qubits in a common environment
• Classical-Quantum Noise Mitigation for NISQ Hardware
• Continuous dynamical decoupling of spin chains: modulating the spin-environment and spin-spin interactions
• Quadrupole transitions and quantum gates protected by continuous dynamic decoupling
• Uhrig Dynamical Control of a Three-Level System Via Non-Markovian Quantum State Diffusion
• Continuous dynamical decoupling and decoherence-free subspaces for qubits with tunable interaction
• Decoherence mitigation for geometric quantum computation
• Floquet Dynamical Decoupling at Zero Bias
• Transforming spin chains with a continuous driving field