关键词: 量子信息分离, 非对称W态, 共同幺正操作, 经典信息, quantum information splitting, asymmetric W state, collective unitary operation, classical communication

Abstract: We propose a quantum information splitting scheme of two-qubit state by using two asymmetric W states as quantum channels. We show that if the two-qubit state is known to the sender (Alice), then she can split quantum information and distribute it to the receivers (Bob and Charlie) by performing a two-qubit projective measurement. Bob and Charlie can collaborate and recover the quantum information by first performing a collective unitary operation on their qubits, and then respectively implementing two single-qubit unitary operations. So our scheme greatly reduces the measurement complexity.