Spin-Particles Entanglement in Robertson-Walker Spacetime

Abstract

We study the entanglement between two modes of Dirac field in an expanding spacetime characterized by the Robertson-Walker metric. This spacetime model turns out to be asymptotically (in the remote past and far future regions) Minkowskian. Then, on the one hand we show entanglement creation between particles and anti-particles when passing from remote past to far future. On the other hand we show that particles entanglement in the remote past degrades into the far future. These effects are traced back to particles creation. In our analysis we highlight the role of spin (polarization) of particles and compare the results with those obtainable without accounting for it.

References in corpus (4)

• Entanglement of Dirac fields in non-inertial frames
• Entangling Power of an Expanding Universe
• Entanglement in an expanding spacetime
• On Relativistic Quantum Information Properties of Entangled Wave Vectors of Massive Fermions

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