Coherent Generation and Protection of Anticoherent Spin States

TL;DR

This paper introduces a novel protocol for generating anticoherent spin states and develops dynamical decoupling techniques to protect them, with potential applications in quantum sensing and entanglement studies.

Contribution

The paper presents the first protocol for generating anticoherent spin states and new dynamical decoupling methods for their protection.

Findings

Successful generation of anticoherent spin states at various orders.

Effective dynamical decoupling sequences extend coherence times.

Potential use cases in quantum sensing and entanglement research.

Abstract

We report the first protocol specifically designed to generate anticoherent spin-$j$ states at different orders. The protocol consists of cycles of a rotation pulse about an axis followed by a squeezing pulse in a perpendicular direction. To protect these states, we develop dynamical decoupling techniques using group-based sequence design and the dynamically corrected gate formalism. We analyze key sources of dephasing, disorder, and dipole-dipole interactions and assess the effectiveness of our methods in preserving coherence. Potential applications of the produced anticoherent spin states include quantum sensing and studies related to quantum entanglement.