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Questions tagged [quantum-anomalies]

This tag is for anomalies in a symmetry, either in classical or quantum theories.

DO NOT USE THIS TAG for anomalies in a measurement.

This tag is for anomalies in a symmetry, either in classical or quantum theories.

DO NOT USE THIS TAG for anomalies in a measurement, e.g. the tag should not be used if the question deals with the Pioneer anomaly.

381 questions
8
votes
2 answers

Choice of basis for Fujikawa method to derive chiral anomaly

I am studying the Fujikawa method of determining the chiral anomalies in a $U(1)$ theory. As we know the basis vectors selected are the eigenstates of the Dirac operator. One of the reasons given is that the eigenstates diagonalize the action which…
SubhamDC
  • 301
3
votes
1 answer

What is the approx. separation of chiral Weyl nodes in recently discovered Chiral anomaly in Dirac semi-metals?

Recent papers have shown evidence for the existence of the long sought after Chiral axial anomaly to be present in certain Weyl semi-metals.... Usually they talk of the parallel B and E fields inducing violation of symmetry so as to create…
Gary
  • 134