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Dissipative dynamics of four-site tunneling of H

Winterstetter, Manfred ; Grifoni, Milena


We investigate the dissipative properties of a quantum particle which can tunnel among four equivalent sites on a plane. Our four-state system model is of experimental relevance to probe the quantum properties of H or D being trapped by substitutional Zr in Nb. Upon performing a unitary transformation, the problem is reduced to that of effective spin-boson systems. Numerical and analytical ...


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