Quantum computer based on activated dielectric nanoparticles selectively interacting with short optical pulses

The operation principle of a quantum computer is proposed based on a system of dielectric nanoparticles activated with two-level atoms – cubits, in which electric dipole transitions are excited by short intense optical pulses. It is proved that the logical operation (logical operator) CNOT (controlled NOT) is performed by means of time-dependent transfer of quantum information over `long' (of the order of 10⁴ nm) distances between spherical nanoparticles owing to the delayed interaction between them in the optical radiation field. It is shown that one-cubit and two-cubit logical operators required for quantum calculations can be realised by selectively exciting dielectric particles with short optical pulses.