Measurements of spin-coherence in NV centers for diamond-based quantum sensors

TL;DR

This paper characterizes the spin-coherence of NV centers in ultrapure diamond to evaluate their potential for room-temperature quantum sensing and information processing.

Contribution

It provides experimental measurements of spin-coherence times in engineered diamond samples, advancing understanding of NV centers for quantum applications.

Findings

Longer coherence times observed in ultrapure diamond NV centers

Potential for high-precision quantum sensing at room temperature

Benchmark data for quantum protocol development

Abstract

One of the biggest challenges to implement quantum protocols and quantum information processing (QIP) is achieving long coherence times, usually requiring systems at ultra-low temperatures. The nitrogen-vacancy (NV) center in diamond is a promising alternative to this problem. Due to its spin properties, easy manipulation, and the possibility of doing optical state initialization and readout, it quickly became one of the best solid-state spin systems for QIP at room temperature. Here, we present the characterization of the spin-coherence of an ensemble of NV centers in an engineered sample of ultrapure diamond as a testbed for quantum protocols for quantum metrology.