PHASE SHIFTER, QUANTUM LOGIC GATE DEVICE, PHOTON QUANTUM COMPUTING DEVICE, AND PHASE SHIFTING METHOD

摘要

The embodiment of the present invention provides a phase shifter, a quantum logic gate device, a photon quantum computing device, and a phase shifting method. The phase shifter comprises an optical resonator and a quantum dot, wherein a resonant frequency of the optical resonator is ω_c; the quantum dot is located in the optical resonator, and the transition frequency of the quantum dots is ω_x; the quantum dot and the optical resonator are coupled to obtain a coupling system; the transition energy difference of the coupling system is determined by ω_c,ω_x and a coupling strength g of the quantum dot and the optical resonator; ω_x is set such that the transition energy difference of the coupling system is the same as the energy of one photon or two photons input by the coupling system.In the embodiment of the present invention, the phase inversion of the quantum state can be realized by adjusting the transition frequency of the quantum dot.