Measuring vacuum polarization with Josephson junctions.
We argue that the vacuum polarization by the virtual electron-positron pairs can be measured by studying a Josephson junction in a strong magnetic field. The vacuum polarization results in a weak dependence of the Josephson constant on the magnetic field strength which is within the reach of the existing experimental techniques.
Penin
Alexander A
AA
Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada. apenin@phys.ualberta.ca