Properties of Stark Resonant States in Exactly Solvable Systems

Figure 2

Outgoing resonance eigenvalue equation landscapes for Dirac-delta ((a) ) and square-well potential ((b) and ) systems in the external field . To visualize the locations of the energy eigenvalues, we evaluate (14) and (15) over a range of in the complex plane and convert to a height map via the formula , so that its roots are represented by poles that are easy to locate ().

(a)

(b)