Quantum state generating method, quantum state generating device, and program

摘要

PROBLEM TO BE SOLVED: To generate a plurality of quantum bits in desired entanglement states while suppressing influence of loss, using a probabilistic gate.;SOLUTION: A method includes performing X measurement of one quantum bit contained in a first quantum bit set consisting of three or more quantum bits in an entanglement state, to generate a second quantum bit set in a quantum state: |η₁|Φ₁|Φ₃|η₃+|η₂|Φ₂|Φ₄|η₄. To the quantum state and a quantum state of a third quantum bit set: |η₅₁|Φ₅|η₅₂+|η₆₁|Φ₆|η₆₂, a quantum operation is applied represented by the relation: γ₁Φ₃|Φ₅|+γ₂Φ₄|Φ₆|, to generate a fourth quantum bit set in a quantum state: |η₇₁|Φ₁|η₇₂+|η₈₁|Φ₂|η₈₂, which is in an entanglement state.;COPYRIGHT: (C)2013,JPO&INPIT