Robust Spin Polarization by Adiabatic Dynamical Decoupling

Abstract

High-fidelity multi-qubit initialization is vital for quantum simulation, quantum information processing (QIP), and quantum sensing. In diamond platforms, nuclear spin registers can be initialized through polarization transfer from a nearby electronic spin whose high gyromagnetic ratio enables efficient dynamical nuclear polarization (DNP). These hybrid systems are typically controlled using diabatic spin rotations, which require precise knowledge of all system parameters. Adiabatic DNP protocols on the other hand have less strict requirements and could enable robust and high fidelity spin transfer. However, due to the slow adiabatic sweeps and limited electron spin coherence times, this approach has remained inaccessible. Here, we demonstrate adiabatic pulsed nuclear spin polarization at room temperature in diamond. We achieve enhanced polarization efficiency, a broad resonance window, and improved tolerance to hyperfine coupling uncertainties relative to conventional diabatic pulsed protocols. We also show how this approach can benefit the initialization of spin clusters. These results set the scene for enhanced qubit initialization in solid state through adiabatic pulsed driving, with applications in solid-state quantum sensor and quantum memory technologies.

7 pages, and 4 figures

References in corpus (25)

• Quantum Computing
• Shortcuts to adiabaticity: concepts, methods, and applications
• Solid-state electronic spin coherence time approaching one second
• Observation of coherent oscillation of a single nuclear spin and realization of a two-qubit conditional quantum gate
• High-frequency approximation for periodically driven quantum systems from a Floquet-space perspective
• Room temperature coherent control of coupled single spins in solid
• A 10-qubit solid-state spin register with quantum memory up to one minute
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• Detection and control of individual nuclear spins using a weakly coupled electron spin
• One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment
• Accelerated quantum control using superadiabatic dynamics in a solid-state lambda system
• Fault-tolerant operation of a logical qubit in a diamond quantum processor
• Excited-state spectroscopy using single-spin manipulation in diamond
• Observation of a many-body-localized discrete time crystal with a programmable spin-based quantum simulator
• Transition times in the Landau-Zener model
• Gate-based single-shot readout of spins in silicon
• Pulsed polarisation for robust DNP
• Quantum Metrology with Strongly Interacting Spin Systems
• Dynamical decoupling based quantum sensing: Floquet spectroscopy
• Quantum simulation of antiferromagnetic Heisenberg chain with gate-defined quantum dots
• Hyperpolarisation of external nuclear spins using nitrogen-vacancy centre ensembles
• High Fidelity Adiabatic Quantum Computation via Dynamical Decoupling
• Shortcuts to Dynamic Polarization
• ${}^{13}$C Hyperpolarization with Nitrogen-Vacancy Centers in Micro- and Nanodiamonds for Sensitive Magnetic Resonance Applications
• Multi-qubit gates protected by adiabaticity and dynamical decoupling applicable to donor qubits in silicon