Quantum gyroscopes and Godel’s universe: entanglement opens a new testing ground for cosmology

A. Delgado, W.P. Schleich and G. Sussmann
NEW JOURNAL OF PHYSICS 4 (2002)

ABSTRACT

Some exact solutions of Einstein’s field equations represent a rotating universe. One example is Godel’s cosmological model. Bianchi solutions generalize the Godel 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.

DOI: http://dx.doi.org/



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