Parallel selective nuclear spin addressing for fast high-fidelity quantum gates

Abstract

Due to their long coherence times, nuclear spins have gained considerable attention as physical qubits. Two-qubit gates between nuclear spins of distinct resonance frequencies can be mediated by electron spins, usually employing a sequence of electron-nuclear gates. Here we present a different approach inspired by, but not limited to, NV centers in diamond and discuss possible applications. To this end we generalize external electron spin control sequences for nuclear spin initialization and hyperpolarization to achieve the simultaneous control of distinct nuclear spins via an electron spin. This approach results in efficient entangling gates that, compared to standard techniques, reduce the gate time by more than 50% when the gate time is limited by off-resonant coupling to other spins, and by up to 22% when the gate time is limited by small electron-nuclear coupling.

9+4 pages, 4+2 figures

References in corpus (23)

• The nitrogen-vacancy colour centre in diamond
• On the Improvement of Frequency Stardards with Quantum Entanglement
• Observation of coherent oscillation of a single nuclear spin and realization of a two-qubit conditional quantum gate
• Room temperature entanglement between distant single spins in diamond
• A 10-qubit solid-state spin register with quantum memory up to one minute
• Universal control and error correction in multi-qubit spin registers in diamond
• Entanglement Distillation between Solid-State Quantum Network Nodes
• Extending Quantum Coherence in Diamond
• Ancilla-assisted quantum process tomography
• Detection and control of individual nuclear spins using a weakly coupled electron spin
• Towards a large-scale quantum simulator on diamond surface at room temperature
• Robust dynamical decoupling for quantum computing and quantum memory
• Detecting and polarizing nuclear spins with double resonance on a single electron spin
• Scalable Quantum Photonics with Single Color Centers in Silicon Carbide
• Pulsed polarisation for robust DNP
• Optimal pulse spacing for dynamical decoupling in the presence of a purely-dephasing spin-bath
• Robust Dynamical Decoupling Sequences for Individual Nuclear Spin Addressing
• Optically induced dynamic nuclear spin polarisation in diamond
• Noise-resilient Quantum Computing with a Nitrogen-Vacancy Center and Nuclear Spins
• Soft Quantum Control for Highly Selective Interactions among Joint Quantum Systems
• Delayed entanglement echo for individual control of a large number of nuclear spins
• Arbitrary Nuclear Spin Gates in Diamond Mediated by a NV-center Electron Spin
• Noise-resilient architecture of a hybrid electron-nuclear quantum register in diamond

Cited by in corpus (4)

• Coherence and entanglement of inherently long-lived spin pairs in diamond
• ${}^{13}$C Hyperpolarization with Nitrogen-Vacancy Centers in Micro- and Nanodiamonds for Sensitive Magnetic Resonance Applications
• Selective nuclear-spin interaction based on a dissipatively stabilized nitrogen-vacancy center
• Symmetry-Based Singlet-Triplet Excitation in Solution Nuclear Magnetic Resonance