Initialization and Readout of Spin Chains for Quantum Information Transport

TL;DR

This paper demonstrates initialization and readout of nuclear spin chains in apatite crystals for quantum information transport, enabling state preparation and evolution probing without single-spin addressability, advancing scalable quantum communication.

Contribution

It introduces control schemes for initializing and reading out spin chains in apatite crystals, improving quantum information transport methods without requiring single-spin resolution.

Findings

Successful initialization and readout of spin chains using NMR techniques

Optimized control schemes based on lineshape analysis

Potential for scalable quantum information transport

Abstract

Linear chains of spins acting as quantum wires are a promising approach to achieve scalable quantum information processors. Nuclear spins in apatite crystals provide an ideal test-bed for the experimental study of quantum information transport, as they closely emulate a one-dimensional spin chain. Nuclear Magnetic Resonance techniques can be used to drive the spin chain dynamics and probe the accompanying transport mechanisms. Here we demonstrate initialization and readout capabilities in these spin chains, even in the absence of single-spin addressability. These control schemes enable preparing desired states for quantum information transport and probing their evolution under the transport Hamiltonian. We further optimize the control schemes by a detailed analysis of $^{19}$F NMR lineshape.