Photon echoes in strong magnetic fields

Abstract

The polarization properties of photon echoes in strong magnetic field, when the action of this field during the time of propagation of the exciting pulses and the echo signal through the resonant gaseous medium cannot be neglected, are studied theoretically. The photon echo polarization in strong magnetic field cannot be described by the polarization vector but rather by the polarization matrix. The degree of the photon echo polarization decreases with the increase of the magnetic field strength. The dependence of the photon echo intensity on the magnetic field strength was also analyzed numerically. In strong magnetic field the fast oscillations of this intensity appear to be damping and modulated by the slower ones. The spectrum of these oscillations depend also on the spectra of the exciting pulses, so that in case of small area of the first exciting pulse its temporal shape may be reconstructed from the oscillations of the echo intensity versus the magnetic field strength. The degree of the photon echo polarization versus magnetic field strength

The Deterministic Generation of Photons by Cavity Quantum Electrodynamics

“…This guarantees the two-level nature of the microwave interaction. For a recent paper on this fact see [15].…”

On the polarization properties of the micromaser pumped by the atoms with degenerate levels

“…In the micromaser experiments the atoms are excited from the ground state g with the angular momentum J g to the upper maser level b with the angular momentum J b by the linearly polarized resonant laser pulses. In case of the micromaser standard operation the atoms enter the cavity in the excited maser level their non-zero density matrix elements ρ in A bb µµ = n b µµ being defined by the relations [9]:…”

Jaynes–Cummings model with degenerate atomic levels and two polarization modes of the quantized field

“…However the levels of an isolated atom are degenerate in the projections of the angular momenta on the quantization axis, and this degeneracy must be taken into account. The Jaynes-Cummings model with degenerate atomic levels and a single mode of the quantized field with the fixed polarization was studied in [9][10][11][12]. In the paper [9] the general expression for the evolution operator for such a model was obtained.…”

“…The Jaynes-Cummings model with degenerate atomic levels and a single mode of the quantized field with the fixed polarization was studied in [9][10][11][12]. In the paper [9] the general expression for the evolution operator for such a model was obtained. This solution was employed to study the polarization properties of the micro-maser [9][10][11].…”