摘要
We investigate the quantum dynamics of the decay of a multiple-component positronium condensate into pairs of photons. A positronium atom has four internal spin states which are interconvertible through s-wave interactions. The quantum fields of all spin states of positroniums and photons are simulated from first principle in quasi-one-dimensional system using the truncated Wigner method. This method warrants us a full treatment of the depletion of positronium fields and the spin mixing induced by s-wave collisions between positronium atoms. Particularly,it yields the momentum spectrum of the emitted photons and the photon-photon correlations.
基金
Supported by National Natural Science Foundation of China under Grant Nos.11434011,11674334,11421063,and 11674393
National Key Basic Research Special Foundation of China under Grant No.2012CB922104
the Fundamental Research Funds for the Central Universities
the Research Funds of Renmin University of China under Grant Nos.16XNLQ03 and 17XNH054
