Quantum read-out and fast initialization of nuclear spin qubits with electric currents

TL;DR

This paper proposes a theoretical method for fast electrical initialization and detection of nuclear spin qubits in semiconductors, addressing key challenges in quantum information processing.

Contribution

It introduces a new theory describing how electric currents interact with nuclear spins, enabling rapid electrical read-out and initialization of nuclear spin qubits.

Findings

Provides a sensitivity criterion for electrical detection of nuclear spins

Proposes an all-electrical method for fast nuclear spin initialization

Advances quantum control techniques for solid-state nuclear spin qubits

Abstract

Nuclear spin qubits have the longest coherence times in the solid state, but their quantum read-out and initialization is a great challenge. We present a theory for the interaction of an electric current with the nuclear spins of donor impurities in semiconductors. The theory yields a sensitivity criterion for quantum detection of nuclear spin states using electrically detected magnetic resonance, as well as an all electrical method for fast nuclear spin qubit initialization.