TY - JOUR

T1 - Quantum vibrational impurity embedded in a one-dimensional chain

AU - Molina, M. I.

AU - Rössler, J. A.

AU - Tsironis, G. P.

N1 - Funding Information:
edgep artial supportf rom FONDECYT grant 1950655 while the third one (G.P.T.) acknowledges support from II ENEA grant 95EA-115o f the General Secretariat of Researcha nd Technology of Greece.

PY - 1997/9/8

Y1 - 1997/9/8

N2 - We perform a fully quantum mechanical numerical calculation for the problem of a single electron (or excitation) propagating in an N-site one-dimensional chain in the presence of a single Holstein impurity. We compute the long-time averaged probability for finding the electron on the impurity site as a function of the nonlinearity parameter, defined in terms of the electron-phonon coupling strength and the oscillator frequency. The results, in the intermediate nonlinearity parameter range, differ substantially from the ones obtained through the use of the discrete nonlinear Schrödinger equation, even in the high-frequency regime.

AB - We perform a fully quantum mechanical numerical calculation for the problem of a single electron (or excitation) propagating in an N-site one-dimensional chain in the presence of a single Holstein impurity. We compute the long-time averaged probability for finding the electron on the impurity site as a function of the nonlinearity parameter, defined in terms of the electron-phonon coupling strength and the oscillator frequency. The results, in the intermediate nonlinearity parameter range, differ substantially from the ones obtained through the use of the discrete nonlinear Schrödinger equation, even in the high-frequency regime.

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U2 - 10.1016/S0375-9601(97)00539-2

DO - 10.1016/S0375-9601(97)00539-2

M3 - Article

AN - SCOPUS:4243845853

VL - 234

SP - 59

EP - 63

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

SN - 0375-9601

IS - 1

ER -