De Sitter spacetime as a momentum measuring apparatus

• Autorzy: Nistor Nicolaevici
• Języki publikacji: EN

Abstrakty

EN

We discuss the evolution of a quantum wave packet in the expanding de Sitter spacetime using the plane wave solutions of the Dirac equation. We concentrate on the case of large negative times when the packet approaches the event horizon and confirm that the evolution accords with that expected from the classical trajectories. We point out that in certain conditions the packet can split into two components that become localized at different parts of the horizon and that this effect can be seen, in an idealized sense, as a measuring process for the momentum of the particle, in direct analogy with the measurement of spin in a Stern-Gerlach experiment.

Słowa kluczowe

EN

de Sitter spacetime; Dirac equation; wave packets

• Czasopismo: Open Physics
• Rocznik: 2012
• Tom: 10
• Numer: 1
• Strony: 51-60

Daty

wydano

2012-02-01

online

2011-12-03

Twórcy

autor

Nistor Nicolaevici

• Faculty of Physics, West University of Timişoara, V. Pârvan 4, 300223, Timişoara, Romania,

Bibliografia

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Identyfikatory

DOI

10.2478/s11534-011-0077-5