Time-resolved dynamics of electronic wave packets above the classical field-ionization threshold

Edge-magnetoplasmon wave-packet revivals in the quantum-Hall effect

“…These experiments use a pump-probe method of detection involving either photoionization 26 or phase-sensitive Ramsey interference and electric-field ionization. [38][39][40] In both of these procedures, the wave packet is excited initially by a short laser pulse that creates a superposition of energy eigenstates with the principal quantum number centered on a value n. The wave packet initially forms near the nuclear core of the atom. After the pump pulse has passed, the wave packet evolves under the influence of the Coulomb potential, oscillating between inner and outer apsidal points of the keplerian ellipse corresponding to n.…”

Rydberg-electron wave-packet dynamics in parallel electric and magnetic fields and evidence for stabilization

“…APPENDIX 8: CLOSED-ORBIT CALCUATION is separable into two uncoupled equations of motion in the u and v coordinates. We then integrate the HamiltonJacobi equations of motion [22] numerically: -p"(t) = -2Eu(t) -2Zu(t)' + -R u(t) v(t) + -R u(t)v(t), 2 …”

“…Until quite recently, however, measurements of Rydberg wave packets were hampered by the poor efIiciency of the conventional photoionization detection techniques which were employed. An important improvement in the efIiciency of detecting Rydberg electron wave packets was the two pump pulse Ramsey interference technique which was Grst proposed by Noordam et al [1] and demonstrated to work by Broers et al [2], Christian et al [3], and Jones et al [4]. Following the development of this technique, electron motion in the angular momentum coordinates was investigated above the classical field-ionization limit in an external electric field, where neither frequency-resolved experiments nor conventional time-resolved photoionization detection technique would have been appropriate [5].…”

Single-shot detection of wavepacket evolution

“…3 can be used to produce an autocorrelation of the wavepacket without relying on RMS signal averaging. [6,7] The signal level or power at the optical transition frequency can be obtained by taking the discrete Fourier transform of the single-shot phase delay scans. Therefore, one can mea sure the interference level (i.e.…”

“…First, we have used the imaging detector to resolve the fast phase evolution of a Rydberg wavepacket probed using bound-state interferometry. [1][2][3][4][5][6][7] Ground state Ca atoms are excited to the 4s4p level using a nsec dye laser. A 500 fsec, 392 nm laser pulse then drives the 4s4p -4snd transition producing a Rydberg wavepacket centered near n = 25.…”