The quantum calculation device and the quantum entanglement control

摘要

PPROBLEM TO BE SOLVED: To efficiently create a quantum entanglement state by two quantum bits arbitrarily selected from among a plurality of quantum bits. PSOLUTION: In creating a quantum entanglement state between a quantum bit QSB1/SBand a quantum bit QSB4/SB, first of all, the resonant frequency ωSBres/SBof a variable resonator vres is added to a sum frequency ωSBQ1/SB+ωSBQ4/SBor a difference frequency ¾ωSBQ1/SB-ωSBQ4/SB¾ of the resonant frequencies ωSBQ1/SBand ωSBQ4/SBof the quantum bits QSB1/SBand QSB4/SB. By irradiating the quantum bits QSB1/SBand QSB4/SBwith a microwave pulse having the sum frequency ωSBQ1/SB+ωSBQ4/SBor the difference frequency ¾ωSBQ1/SB-ωSBQ4/SB¾, the quantum entanglement state of the quantum bits QSB1/SBand QSB4/SBcan be created. PCOPYRIGHT: (C)2008,JPO&INPIT