Phys. Rev. D 80, 033008 (2009) [4 pages]QED vacuum fluctuations and induced electric dipole moment of the neutronReceived 14 July 2009; published 25 August 2009 Quantum fluctuations in the QED vacuum generate nonlinear effects, such as peculiar induced electromagnetic fields. In particular, we show here that an electrically neutral particle, possessing a magnetic dipole moment, develops an induced electric dipole-type moment with unusual angular dependence, when immersed in a quasistatic, constant external electric field. The calculation of this effect is done in the framework of the Euler-Heisenberg effective QED Lagrangian, corresponding to the weak field asymptotic expansion of the effective action to one-loop order. It is argued that the neutron might be a good candidate to probe this signal of nonlinearity in QED. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.80.033008
DOI:
10.1103/PhysRevD.80.033008
PACS:
12.20.Ds, 11.10.−z
See AlsoSee Also: O. Zimmer, C. A. Dominguez, H. Falomir, and M. Loewe, Observability of an induced electric dipole moment of the neutron from nonlinear QED, Phys. Rev. D 85, 013004 (2012). |
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