Physics

2005, No. 6

E.K. Bashkirov

LIGHT SQUEEZING IN THE SYSTEM OF TWO NONIDENTICAL TWO-LEVEL ATOMS WITH ONE-PHOTON TRANSITIONS

Second-order squeezing and squeezing of the square of the field amplitude for two nonidentical two-level atoms interacting resonantly with quantum electromagnetic field in lossless cavity is studied assuming the field to be initially in the coherent state and both atoms to be in the ground state. The time-dependent squeezing parameters are calculated. The effect of the relative differences in two coupling constants on the squeezing parameters is analyzed.

V.A. Saleev, D.V. Vasin

HADROPRODUCTION OF HEAVY QUARKONIA IN QUASI-MULTI-REGGE KINEMATICS

The quarkonia (cc, bb) hadroproduction in framework of the quasimulti-Regge kinematics and the nonrelativistic QCD at leading order in α_s and ν is studied. The Tevatron data (run I and run II) for p_T -spectra are fitted to obtain the S- and P-wave. The color octet nonperturbative matrix elements at the different choice of the unintegrated gluon distribution function in a proton are obtained.