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arXiv · 0907.1944

QED vacuum fluctuations and induced electric dipole moment of the neutron

C. A. Dominguez·H. Falomir·M. Ipinza·S. Kohler·M. Loewe·J. C. Rojas
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Abstract

Quantum fluctuations in the QED vacuum generate non-linear 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 non-linearity in QED.

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C. A. Dominguez, H. Falomir, M. Ipinza, S. Kohler, M. Loewe, J. C. Rojas. 2009-08-05. QED vacuum fluctuations and induced electric dipole moment of the neutron. https://doi.org/10.1103/physrevd.80.033008

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