35 citations · 128 across the 9 of their papers we have counts for
9 papers
Recent Developments in the Theory of Tunneling
Hideaki Aoyama, Toshiyuki Harano, Hisashi Kikuchi +3
Path-integral approach in imaginary and complex time has been proven successful in treating the tunneling phenomena in quantum mechanics and quantum field theories. Latest developm…
Electroweak baryon and lepton number violating processes at high energies by the valley instanton
Toshiyuki Harano, Masatoshi Sato
We calculate the cross sections of the baryon and lepton number violating processes. The proper valley method enables us to calculate the multi-boson processes, which have the poss…
Multi-instanton calculus versus exact results in N=2 supersymmetric QCD
Toshiyuki Harano, Masatoshi Sato
Microscopic tests of the exact results are performed in supersymmetric QCD. We present the complete construction of the multi-instanton in supersymmetric QCD. A…
Multi-instanton calculus in N=2 supersymmetric QCD
Hideaki Aoyama, Toshiyuki Harano, Masatoshi Sato +1
Microscopic tests of the exact results are performed in N=2 SU(2) supersymmetric QCD. We construct the multi-instanton solution in N=2 supersymmetric QCD and calculate the two-inst…
Fake Instability in the Euclidean Formalism
Hideaki Aoyama, Toshiyuki Harano, Hisashi Kikuchi +2
We study the path-integral formalism in the imaginary-time to show its validity in a case with a metastable ground state. The well-known method based on the bounce solution leads t…
Valley Instanton versus Constrained Instanton
Hideaki Aoyama, Toshiyuki Harano, Masatoshi Sato +1
Based on the new valley equation, we propose the most plausible method for constructing instanton-like configurations in the theory where the presence of a mass scale prevents the…
Valley Instanton in the Gauge-Higgs System
Hideaki Aoyama, Toshiyuki Harano, Masatoshi Sato +1
The instanton configuration in the SU(2)-gauge system with a Higgs doublet is constructed by using the new valley method. This method defines the configuration by an extension of t…
Complex-time path-integral formalism for quantum tunneling
Hideaki Aoyama, Toshiyuki Harano
The complex-time formalism is developed in the framework of the path-integral formalism, to be used for analysis of the quantum tunneling phenomena. We show that subleading complex…
Complex-time approach for semi-classical quantum tunneling
Hideaki Aoyama, Toshiyuki Harano
The complex-time method for quantum tunneling is studied. In one-dimensional quantum mechanics, we construct a reduction formula for a Green function in the number of turning point…