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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Quantum gyroscopes and Gödel's universe: entanglement opens a new testing ground for cosmology

A Delgado1, W P Schleich1 and G Süssmann2

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Some exact solutions of Einstein's field equations represent a rotating universe. One example is Gödel's cosmological model. Bianchi solutions generalize the Gödel metric and include the expansion of the universe. We propose a measurement of the cosmic rotation using a light or matter wave interferometer based on the Sagnac effect. Entanglement between the quanta employed in this quantum gyroscope enhances the accuracy, thereby coming closer to the more-than-challenging requirements of such experiments.


PACS

98.80.Qc Quantum cosmology

04.40.Nr Einstein-Maxwell spacetimes, spacetimes with fluids, radiation or classical fields

04.20.-q Classical general relativity

07.60.Ly Interferometers

Subjects

Instrumentation and measurement

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 1 (June 2002)

Received 26 April 2002, in final form 10 June 2002

Published 26 June 2002



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