Abstract <p>The conditions of soliton formation in a liquid crystal layer for generation of a pair of photons in an entangled quantum state (biphotons) during quantum calculations are considered. The geometrical dimensions of the soliton generated by a pulse of optical radiation, its dynamics and stability are estimated by using the knowledge of the liquid crystal physical parameters as well as its non-linear optical properties. The possibility of overlapping of optical solitons neighboring in space or time (or regions inside the liquid crystal layer, in which the deformation induced by the light wave field from successive light pulses occurs) is considered. In nematic liquid crystals (LCs), it is possible to obtain single solitons with spatial size of several tens of micrometers and less, the formation time from fractions of a millisecond to tens of milliseconds, and the existence time from fractions of the millisecond to hundreds of milliseconds. On this basis, it is possible to “encode” entangled states with a high level of signal distinction and to carry out quantum calculations.</p>