Coherent trapping of populations upon excitation by the Λ-scheme in a weak magnetic field

Polarization characteristics of emission of an ensemble of atoms on coherent excitation in the presence of a strong magnetic field with allowance for the Doppler profile width

“…1). Then, according to the Doppler effect, the (M a ) ↔ (M b ) transitions can occur only in atoms that have the projection of velocity v on the direction of propagation of an exciting beam v related to transition frequency ω as follows: (8) Then, if we will measure the time in units of the lifetime of the 3 3 S 1 state τ 0 = 36 × 10 -9 s [12], characterize the eigenvalues of energy values а and b by quantities = Е а + and = Е b + , and introduce density matrices ρ i,j (t) (i, j = a, b) related to the analogous matrices used before by the relationships then, in the rotating wave approximation [13], system (7) …”

“…This study is a continuation of our investigation [7][8][9] of polarization characteristics of many-level coherently excited systems with low-lying levels excited by an axially symmetric interaction. In [7,8], we considered a system consisting of three isolated multiplets in the presence and in the absence of a weak magnetic field, with one of the multiplets being coherently populated from the other two.…”

“…In [7,8], we considered a system consisting of three isolated multiplets in the presence and in the absence of a weak magnetic field, with one of the multiplets being coherently populated from the other two. In contrast to the situation considered earlier, the low-lying multiplets of a system studied in [9] were separated by a narrow energy gap, with the external magnetic field acting on them being strong.…”