Interference effects in molecular system with curve crossing

被引:4
作者
Ferretti, A [1 ]
Lami, A [1 ]
Villani, G [1 ]
机构
[1] CNR, Ist Chim Quantist & Energet Mol, I-56126 Pisa, Italy
关键词
D O I
10.1016/S0009-2614(98)00389-3
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The time-dependent behavior of molecular systems exhibiting a curve-crossing (either natural or photon-induced) is shown to exhibit marked interference patterns. These are particularly evident for single-mode harmonic systems and for weak inter-electronic coupling. It is shown that, in the case of degenerate potential energy surfaces, interference gives rise to jumps in the transition probability (at each passage of the wavepacket through the crossing region) whose height depends on time. In the case of non-degenerate potential energy curves, depending on the energy gap, one may observe a periodic or quasi-periodic behavior. Including additional modes results in a decrease of interferential features. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:131 / 135
页数:5
相关论文
共 22 条
[1]   THE EVOLUTION OF THE WAVE-FUNCTION IN A CURVE CROSSING PROBLEM COMPUTED BY A FAST FOURIER-TRANSFORM METHOD [J].
ALVARELLOS, J ;
METIU, H .
JOURNAL OF CHEMICAL PHYSICS, 1988, 88 (08) :4957-4966
[2]   THEORY OF ULTRAFAST NONADIABATIC EXCITED-STATE PROCESSES AND THEIR SPECTROSCOPIC DETECTION IN REAL TIME [J].
Domcke, Wolfgang ;
Stock, Gerhard .
ADVANCES IN CHEMICAL PHYSICS <D>, 1997, 100 :1-169
[3]   Quantum mechanical and semiclassical dynamics at a conical intersection [J].
Ferretti, A ;
Granucci, G ;
Lami, A ;
Persico, M ;
Villani, G .
JOURNAL OF CHEMICAL PHYSICS, 1996, 104 (14) :5517-5527
[4]   Quantum dynamics of a model system with a conical intersection [J].
Ferretti, A ;
Lami, A ;
Villani, G .
JOURNAL OF CHEMICAL PHYSICS, 1997, 106 (03) :934-941
[5]   CONTROL OF THE YIELD OF PHOTOPHYSICAL PHOTOCHEMICAL PROCESSES BY EXCITATION WITH PROPERLY DELAYED ULTRASHORT PHASE-LOCKED LIGHT-PULSES - A MODEL STUDY ON THE PYRAZINE S-2-]S-1 INTERNAL-CONVERSION [J].
FERRETTI, A ;
LAMI, A ;
VILLANI, G .
CHEMICAL PHYSICS, 1995, 196 (03) :447-454
[6]   Dynamics around a multidimensional conical intersection: A mixed quantum-classical model [J].
Ferretti, A ;
Lami, A ;
Villani, G .
JOURNAL OF CHEMICAL PHYSICS, 1997, 107 (09) :3498-3504
[7]   WAVE PACKET DESCRIPTION OF LASER-INDUCED LEVEL-CROSSINGS [J].
GARRAWAY, BM ;
STENHOLM, S .
OPTICS COMMUNICATIONS, 1991, 83 (5-6) :349-357
[8]   INTERFEROMETER WITHIN A MOLECULE [J].
GARRAWAY, BM ;
STENHOLM, S .
PHYSICAL REVIEW A, 1992, 46 (03) :1413-1420
[9]   WAVE-PACKET DYNAMICS - NEW PHYSICS AND CHEMISTRY IN FEMTO-TIME [J].
GARRAWAY, BM ;
SUOMINEN, KA .
REPORTS ON PROGRESS IN PHYSICS, 1995, 58 (04) :365-419
[10]  
KOPPEL H, 1984, ADV CHEM PHYS, V57, P59