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cond-mat2001
Spin Coherent-State Path Integrals and the Instanton Calculus
Anupam Garg, Evgueny Kochetov, Kee-Su Park +1
We use an instanton approximation to the continuous-time spin coherent-state path integral to obtain the tunnel splitting of classically degenerate ground states. We show that prov…
cond-mat1997★ 8 cited
On representation of the t-J model via spin-charge variables
Evgueni Kochetov, Vladimir Yarunin
We show that the t-J Hamiltonian is not in general reduced to H(S,f), where S and f stand for independent ([S,f]=0) SU(2) (spin) generators and spinless fermionic (hole) field, res…