Combined cycle remote state preparation method based on non-maximally entangled channel n-square control
A technology of entanglement channel and joint preparation, which is applied in the field of quantum state preparation, can solve the problems of maximum entanglement channel environmental interference, etc., and achieve the effect of improving preparation efficiency and safety
Active Publication Date: 2021-08-31
SUZHOU UNIV
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Problems solved by technology
The current joint state preparation is basically carried out in the maximum entanglement channel scenario. In fact, the maximum entanglement channel is easily disturbed by the environment and becomes a non-maximal entanglement channel.
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Embodiment 1
[0227] Example 1: Under the supervision of ten controllers, Alice and Bob jointly prepare for Charlie Bob and Alice jointly prepare for Charlie Charlie and Bob jointly prepare for Alice The complete process includes the following steps:
[0228] Step 1: Seven-bit quantum entanglement channel, as follows:
[0229]
[0230] Perform H transformation on particle 7, and introduce 9 particles at the same time, the channel becomes as follows:
[0231]
[0232] right Particles in Executing the CNOT operation, the entire channel is merged into:
[0233]
[0234] Step 2: Goal state, as follows:
[0235] Alice and Charlie want to prepare an arbitrary quantum state for Bob in the following form:
[0236]
[0237] Bob and Alice want to prepare an arbitrary quantum state for Charlie in the following form:
[0238]
[0239] Charlie and Bob want to prepare an arbitrary quantum state for Alice in the following form:
[0240]
[0241] Alice, Bob, Charlie, the expre...
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The present invention is based on the non-maximally entangled channel N-party control combined cycle remote state preparation method: in N control parties D 1 ,D 2 …D n Under the control of , Alice, Bob, and Charlie jointly carry out a cycle to prepare their desired target states; the whole scheme consists of Alice, Bob, Charlie, N controllers and non-maximally entangled channels. Among them, Alice, Bob, and Charlie are both the sender and the receiver. Under the monitoring of N controllers, the non-maximal entangled state is used as the channel. Alice and Bob jointly prepare the target state for Charlie, and Alice and Charlie jointly prepare for Bob. Target state, Bob and Charlie jointly prepare the target state for Alice. Advantages of the present invention: Only when all the controllers agree, the target information can be transmitted. Compared with a single controller, the introduction of N controllers effectively improves the security of the scheme, using non-maximum entangled states as channels, reducing performance requirements for channel usage.
Description
technical field [0001] The invention relates to the field of quantum state preparation, in particular to a combined cycle remote state preparation method based on non-maximum entanglement channel N-square control. Background technique [0002] Quantum communication is an important research field in quantum information science. The unit of quantum communication to transmit information is the quantum state. In the process of communication, in addition to traditional classical channels, it is more important to establish quantum channels between communicating parties, that is, quantum entanglement between communicating parties. Quantum entanglement plays a pivotal role in quantum communication and quantum computing. It continues to create miracles in classical information theory, such as quantum dense coding, quantum teleportation, and absolutely secure quantum cryptography. [0003] Quantum remote state preparation (remote state preparation) is considered an important part of ...
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IPC IPC(8): H04L9/08
CPCH04L9/0852H04L9/0855H04L9/0858
Inventor 张佳慧锁珍姜敏陈虹刘芹许智航
Owner SUZHOU UNIV