Dynamical quantum phase transition in diamond: Applications in quantum metrology

Gonzalez, Francisco J.; Norambuena, Ariel; Coto, Raul

Abstract

Nonequilibrium dynamics is a paramount scenario for studying quantum systems. The emergence of new features with no equilibrium counterpart, such as dynamical quantum phase transition (DQPT), has attracted wide attention. In this paper, we depart from the well-known Ising model and showcase an experimentally accessible configuration of a negatively charged nitrogen-vacancy center that interacts with nearby carbon-13 nuclear spins. We provide insights into this system in the context of DQPT. We show that nuclear spins undergo DQPT by appropriately choosing the relation between the transverse and longitudinal components of an external magnetic field. Furthermore, we can steer the DQPT via a time-dependent longitudinal magnetic field and apply this control to enhance the estimation of the coupling strength between the nuclear spins. Moreover, we propose a quenched dynamics that originates from the rotation of the central electron spin, which controls the DQPT relying on the anisotropy of the hyperfine coupling.

Más información

Título según WOS: Dynamical quantum phase transition in diamond: Applications in quantum metrology
Título de la Revista: PHYSICAL REVIEW B
Volumen: 106
Número: 1
Editorial: AMER PHYSICAL SOC
Fecha de publicación: 2022
DOI:

10.1103/PhysRevB.106.014313

Notas: ISI