We present a single-photon entanglement concentration protocol for long-distance quantum communication with quantum nondemolition detector. It is the first concentration protocol for single-photon entangled states and it dose not require the two parties of quantum communication to know the accurate information about the coefficient $\alpha$ and $\beta$ of the less entangled states. Also, it does not resort to sophisticated single-photon detectors, which makes this protocol more feasible in current experiments. Moreover, it can be iterated to get a higher efficiency and yield. All these advantages maybe make this protocol have more practical applications in long-distance quantum communication and quantum internet.We present a single-photon entanglement concentration protocol for long-distance quantum communication with quantum nondemolition detector. It is the first concentration protocol for single-photon entangled states and it dose not require the two parties of quantum communication to know the accurate information about the coefficient $\alpha$ and $\beta$ of the less entangled states. Also, it does not resort to sophisticated single-photon detectors, which makes this protocol more feasible in current experiments. Moreover, it can be iterated to get a higher efficiency and yield. All these advantages maybe make this protocol have more practical applications in long-distance quantum communication and quantum internet.

arXiv:0907.0050Quantum Information and ComputationMar 1, 201067 citations

LONG DISTANCE QUANTUM COMMUNICATION

L.-M. Duan, Mikhail D. Lukin, P. Zoller +1 more

Solvay Conference on PhysicsAug 1, 20030 citations

Principle and method of faster-than-light quantum communication

Ji-Yuan Gu, Pei Dong, Bao-Guo Dong

Aiming at the challenge of possibility and feasibility of the faster-than-light quantum communication, the principle is based on the microscopic mass-energy systems correlating with spacetime model and the mass-energy spacetime correlation interactions, we present a kind of possible faster-than-light quantum communication mechanism and its feasible working mode, namely via the microscopic mass-energy systems composed of two quantum entanglement particles correlate with spacetime, to solve the mechanism of transmitting its interactions, combine the nonlocality and quantum operability of quantum entanglements, and add the orderly storage working mode of entanglement particle pairs, with the correlating states between entanglement particle pairs correspond and convert into information encoding, namely could realize the long-distance real-time dynamical information exchange, linking-acting and communication, it also can be referred to as the faster-than-light quantum communication. In this communication procedure, to utilize the long-distance real-time dynamical linking-acting effects of quantum entanglement particles, no need of interaction propagators, directly create and carry out interactions, nonuse any carrier of transmitting information, there is no object in existence to need motion at all, naturally no the limit of speed of light also, therefore, such kind of communication mode is feasible in scientific principles, the presented communication method is feasible technologically. Such kind of communication method, no need of the realized conditions and related complicated systems of the information channels and information transmission carriers of common quantum teleportation systems, just can realize the working and operating mode of noninterference at all, unable interception, unable shield, absolute secrecy, faster-than-light, and the long-distance real-time quantum communication and remote control, which also can make its actual application in technology and engineering become feasible. That can be used in the environmental conditions that the existing communication and remote control technology can not apply or difficultly, for example deep stratum, deep sea, deep space, remote mountains, dangerous zone etc. Any other method can not realize the long-distance real-time communication and remote control.Aiming at the challenge of possibility and feasibility of the faster-than-light quantum communication, the principle is based on the microscopic mass-energy systems correlating with spacetime model and the mass-energy spacetime correlation interactions, we present a kind of possible faster-than-light quantum communication mechanism and its feasible working mode, namely via the microscopic mass-energy systems composed of two quantum entanglement particles correlate with spacetime, to solve the mechanism of transmitting its interactions, combine the nonlocality and quantum operability of quantum entanglements, and add the orderly storage working mode of entanglement particle pairs, with the correlating states between entanglement particle pairs correspond and convert into information encoding, namely could realize the long-distance real-time dynamical information exchange, linking-acting and communication, it also can be referred to as the faster-than-light quantum communication. In this communication procedure, to utilize the long-distance real-time dynamical linking-acting effects of quantum entanglement particles, no need of interaction propagators, directly create and carry out interactions, nonuse any carrier of transmitting information, there is no object in existence to need motion at all, naturally no the limit of speed of light also, therefore, such kind of communication mode is feasible in scientific principles, the presented communication method is feasible technologically. Such kind of communication method, no need of the realized conditions and related complicated systems of the information channels and information transmission carriers of common quantum teleportation systems, just can realize the working and operating mode of noninterference at all, unable interception, unable shield, absolute secrecy, faster-than-light, and the long-distance real-time quantum communication and remote control, which also can make its actual application in technology and engineering become feasible. That can be used in the environmental conditions that the existing communication and remote control technology can not apply or difficultly, for example deep stratum, deep sea, deep space, remote mountains, dangerous zone etc. Any other method can not realize the long-distance real-time communication and remote control.

Jun 23, 20260 citations

Highly Efficient Long-Distance Quantum Communication: a Blueprint for Implementation

Linshu Li, Sreraman Muralidharan, Jungsang Kim +3 more

Bulletin of the American Physical SocietyMar 2, 20150 citations

Linear Optics Quantum Communication over Long Distances

Zeng‐Bing Chen, Huai-Xin Lu, Zhang, Yong-De

We propose a feasible scheme for teleporting an arbitrary polarization state or entanglement of photons by requiring only single-photon (SP) sources, simple linear optical elements and SP quantum non-demolition measurements. An unknown SP polarization state can be faithfully teleported either to a duplicate polarization state or to an entangled state. Our proposal can be used to implement long-distance quantum communication in a simple way. The scheme is within the reach of current technology and significantly simplifies the realistc implementation of long-distance high-fidelity quantum communication with photon qubits.We propose a feasible scheme for teleporting an arbitrary polarization state or entanglement of photons by requiring only single-photon (SP) sources, simple linear optical elements and SP quantum non-demolition measurements. An unknown SP polarization state can be faithfully teleported either to a duplicate polarization state or to an entangled state. Our proposal can be used to implement long-distance quantum communication in a simple way. The scheme is within the reach of current technology and significantly simplifies the realistc implementation of long-distance high-fidelity quantum communication with photon qubits.

arXiv:quant-ph/0202040Feb 7, 20020 citations

\alpha

and

\beta

of the less entangled states. Also, it does not resort to sophisticated single-photon detectors, which makes this protocol more feasible in current experiments. Moreover, it can be iterated to get a higher efficiency and yield. All these advantages maybe make this protocol have more practical applications in long-distance quantum communication and quantum internet.