Reduced coupling with global pulses in quantum registers

Abstract

Decoupling is an important tool to prolong the coherence time of quantum systems. Most decoupling schemes have been assuming selective controls on the system and it is believed that with global pulses one can only decouple systems with certain coupling terms like secular dipole-dipole coupling. In this article we show that with global pulses it is possible to reduce the coupling strength of other types of coupling, which we demonstrate with Ising coupling. The complexity of such pulses is independent of the size of system.

References in corpus (28)

• Dynamical Decoupling of Open Quantum Systems
• Dynamical suppression of decoherence in two-state quantum systems
• A simple formula for the average gate fidelity of a quantum dynamical operation
• Keeping a Quantum Bit Alive by Optimized $\pi$-Pulse Sequences
• Optimized Dynamical Decoupling in a Model Quantum Memory
• Fault-Tolerant Quantum Dynamical Decoupling
• Extending Quantum Coherence in Diamond
• Universal Control of Decoupled Quantum Systems
• An all silicon quantum computer
• Design of Strongly Modulating Pulses to Implement Precise Effective Hamiltonians for Quantum Information Processing
• Performance of Deterministic Dynamical Decoupling Schemes: Concatenated and Periodic Pulse Sequences
• Random decoupling schemes for quantum dynamical control and error suppression
• Universality of Uhrig dynamical decoupling for suppressing qubit pure dephasing and relaxation
• Restoring Coherence Lost to a Slow Interacting Mesoscopic Bath
• Experimental Uhrig Dynamical Decoupling using Trapped Ions
• Multiple-pulse coherence enhancement of solid state spin qubits
• Optimal pulse spacing for dynamical decoupling in the presence of a purely-dephasing spin-bath
• Near-optimal dynamical decoupling of a qubit
• Enhanced Convergence and Robust Performance of Randomized Dynamical Decoupling
• Keeping a Single Qubit Alive by Experimental Dynamic Decoupling
• Optimized, Unequal Pulse Spacing in Multiple Echo Sequences Improves Refocusing
• Quantum simulation via filtered Hamiltonian engineering: application to perfect quantum transport in spin networks
• Rigorous Bounds for Optimal Dynamical Decoupling
• Parallel Information Transfer in a Multi-Node Quantum Information Processor
• Cold three-body collisions in hydrogen-hydrogen-alkali atomic system
• Dynamics of a hard sphere granular impurity
• Efficient decoupling schemes with bounded controls based on Eulerian orthogonal arrays
• Complexity of decoupling and time-reversal for n spins with pair-interactions: Arrow of time in quantum control