Entangling color centers via magnon-antimagnon pair creation

Abstract

We present how entanglement between a spatially separated pair of color centers can be created by letting them weakly interact with the quantum fluctuations of a nonequilibrium magnetic environment. To this end, we consider two coupled ferromagnets, one in the ground state and one in an inverted state with respect to an applied magnetic field. The resulting energetic instability leads to a quantum spin current in the vacuum state that is sustained by the creation of magnon-antimagnon pairs at the interface. We show that these quantum fluctuations imprint a steady-state entanglement onto the two dipole-coupled color centers through nonlocal dissipation. We derive conditions for establishing a maximally entangled Bell state. This entanglement is absent in thermal equilibrium.

6 pages, 3 figures

References in corpus (7)

• Semiconductor Spin Qubits
• Scattering matrix approach to the description of quantum electron transport
• Magnonic black holes
• Bell-state generation for spin qubits via dissipative coupling
• Step-like discontinuities in Bose-Einstein condensates and Hawking radiation: dispersion effects
• Enhanced magnon spin current using the bosonic Klein paradox
• Quantum Equilibration under Constraints and Transport Balance

Cited by in corpus (2)

• Breaking conservation law enables steady-state entanglement out of equilibrium
• Engineering long-lived entanglement through dissipation in quantum hybrid solid-state platforms