Patent ID: 7346246
Filing Date: 2008-03-18
Classification: B82Y,G06N

Abstract:
1. A method of quantum information processing: in which logical qubits |0> L and |1> L are respectively encoded by different near orthogonal coherent states |β> and |α>, where <α|β>≈0, |α> and |β> being the computation basis states for the qubits; in which said logical qubits |0> L and |1> L are respectively encoded by different ones of the vacuum state |0> and a multi-photon optical coherent state |α>, |0> and |α> being the computation basis states for the qubits; and in which the control and target states of a gate are initially in the combined state |φ and in which this combined state is manipulated to produce a combined output state |φ CT > out where where and in which the control and the target qubits are manipulated by the gate such that the input states |0> C |0> T , |0> C |α> T , |α> C |0> T , |α> C |α> T are transformed to the output states |0> C |0> T , |0> C |α> T , |α> C |0> T , −|α> C |α> T , respectively.