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Adiabatic passage through an avoided crossing

✍ Scribed by Vladimir Kouskov; David J. Sloop; S.I. Weissman; Tien-Sung Lin

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 227 KB
Volume: 232
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01309-j

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✦ Synopsis

Fast magnetic field sweeps ( ~ 5 X 10 s G s-t ) are used for passage through an avoided crossing in the photoexcited triplet state of pentacene in p-terphenyl crystals. When Bollx (molecular long axis), there is a level crossing calculated to be near 143 G. Our experiments reveal that the crossing is an avoided one, and the passage through the crossing is adiabatic. Our findings are consistent with the Landau-Zener-Stueckelberg theory of passage through an avoided crossing. By applying radio frequency pulses in the neighborhood of the avoided crossing we estimate the magnitude of the energy gap: 25 + 8 MHz.

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