2020/09/30 by Benedikt Tratzmiller, Jan F. Haase, Zhenyu Wang +1
Materials Science · Physics and Astronomy · #Atomic and Subatomic Physics Research #Coherence (philosophical gambling strategy) #Coherence time #Condensed matter physics #Diamond and Carbon-based Materials Research #Physics #Pulsed EPR #Quantum #Quantum and electron transport phenomena #Quantum computer #Quantum gate #Quantum mechanics #Qubit #Spin (aerodynamics) #Spin echo #Spins #quant-ph
paper · pdf · doi:10.1103/physreva.103.012607
published as Phys. Rev. A 103, 012607 (2021) · 9+4 pages, 4+2 figures
openalex publication_date 2021/01/20 · arxiv created 2021/01/25 · arxiv updated 2021/01/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.