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Connecting the Chiral and Heavy Quark Limits : Full Mass Dependence of Fermion Determinant in an Instanton Background
Gerald V. Dunne
This talk reports work done in collaboration with Jin Hur, Choonkyu Lee and Hyunsoo Min concerning the computation of the precise mass dependence of the fermion determinant for qua…
Beyond the thin-wall approximation : precise numerical computation of prefactors in false vacuum decay
Gerald V. Dunne, Hyunsoo Min
We present a general numerical method for computing precisely the false vacuum decay rate, including the prefactor due to quantum fluctuations about the classical bounce solution,…
Worldline Instantons and Pair Production in Inhomogeneous Fields
Gerald V. Dunne, Christian Schubert
We show how to do semiclassical nonperturbative computations within the worldline approach to quantum field theory using ``worldline instantons''. These worldline instantons are cl…
Numerical Investigation of Monopole Chains
Gerald V. Dunne, Vishesh Khemani
We present numerical results for chains of SU(2) BPS monopoles constructed from Nahm data. The long chain limit reveals an asymmetric behavior transverse to the periodic direction,…
2+1 Dimensional Georgi-Glashow Instantons in Weyl Gauge
Gerald V. Dunne, Vishesh Khemani
Semiclassical instanton solutions in the 3D SU(2) Georgi-Glashow model are transformed into the Weyl gauge. This illustrates the tunneling interpretation of these instantons and pr…
Calculation of QCD Instanton Determinant with Arbitrary Mass
Gerald V. Dunne, Jin Hur, Choonkyu Lee +1
The precise quark mass dependence of the one-loop effective action in an instanton background has recently been computed [arXiv:hep-th/0410190]. The result interpolates smoothly be…