Quantum non-demolition measurements of single donor spins in semiconductors

TL;DR

This paper proposes a quantum non-demolition measurement method for single donor electron spins in semiconductors using a field-effect transistor and magnetic resonance, enabling precise quantum state detection.

Contribution

It introduces a novel technique combining hyperfine coupling and electrical detection for single-shot, projective, and quantum non-demolition measurements of donor electron spins.

Findings

Potential for single-shot, quantum non-demolition measurement of electron spins.

Analysis of sensitivity and experimental requirements.

Facilitates quantum information processing in semiconductors.

Abstract

We propose a technique for measuring the state of a single donor electron spin using a field-effect transistor induced two-dimensional electron gas and electrically detected magnetic resonance techniques. The scheme is facilitated by hyperfine coupling to the donor nucleus. We analyze the potential sensitivity and outline experimental requirements. Our measurement provides a single-shot, projective, and quantum non-demolition measurement of an electron-encoded qubit state.