Phys. Rev. Lett. 70, 560–563 (1993)Measurement of the Casimir-Polder forceReceived 26 October 1992; published in the issue dated 1 February 1993 We have studied the deflection of ground-state sodium atoms passing through a micron-sized parallel-plate cavity by measuring the intensity of a sodium atomic beam transmitted through the cavity as a function of cavity plate separation. This experiment provides clear evidence for the existence of the Casimir-Polder force, which is due to modification of the ground-state Lamb shift in the confined space of a cavity. Our results confirm the magnitude of the force and the distance dependence predicted by quantum electrodynamics. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.560
DOI:
10.1103/PhysRevLett.70.560
PACS:
42.50.Wm, 32.70.Jz, 42.50.Lc
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