Measuring Vacuum Polarization with Josephson Junctions
Alexander A. Penin
DOI 10.1103/PhysRevLett.104.097003 · Physical Review Letters
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Abstract
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.
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