Dephasing of entangled atoms as an improved test of quantized space time

作者：Everitt Mark S^*; Jones Martin L; Varcoe Benjamin T H

来源：Journal of Physics B: Atomic, Molecular and Optical Physics , 2013, 46(22): 224003.

DOI：10.1088/0953-4075/46/22/224003

Cavity quantum electrodynamics (QED) has been highly successful in the demonstration of many features of quantum mechanics and in this paper we introduce a potential future application of cavity QED to the detection of quantized space time. Wang et al (2006 Class. Quantum Grav. 23 L59), demonstrated that the phase of a particle fluctuated due to interactions with random deviations of a conformal gravitational field and therefore that atom interferometers may be sensitive to these fluctuations. Hence, it is possible that sensitivity to Planck scale effects could be achieved with a sufficiently sensitive interferometer. In this paper we demonstrate that a class of entangled states, the N-atom Greenberger-Horne-Zeilinger states, provide a better scaling than atom interferometry and that current experiments are capable of making a significant impact in this field. We outline an experiment which uses atomic beams of rubidium atoms excited to Rydberg states that undergo controlled collisions in high-Q microwave resonators in a sequence that makes the resulting state highly sensitive to conformal field fluctuations. We show that a significant advance in sensitivity is possible.

• 出版日期2013-11-28