Tunneling time, what is its meaning?

23rd International Laser Physics Workshop

McDonald, C.R.^1 ; Orlando, G.^1 ; Vampa, G.^1 ; Brabec, T.^1

Department of Physics, University of Ottawa, Ottawa

ON

K1N 6N5, Canada^1

关键词: Ionization dynamics;    Keldysh;    Laser fields;    Static fields;    Step functions;    Switch-on;    Time varying;    Tunneling time;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/594/1/012019/pdf
DOI  :  10.1088/1742-6596/594/1/012019

来源: IOP

【 摘 要 】

The tunnel time ionization dynamics for bound systems in laser fields are investigated. Numerical analysis for a step function switch-on of the field allows for the tunnel time to be defined as the time it takes the ground state to develop the under-barrier wavefunction components necessary to achieve the static field ionization rate. A relation between the tunnel time and the Keldysh time is established. The definition of the tunnel time is extended to time varying fields and experimental possibilities for measuring the tunnel time are discussed.