AI Article Synopsis
- The study explores the distribution of quantum resources, specifically Einstein-Podolsky-Rosen entanglement and steering, which are essential for advanced quantum communication tasks.
- The researchers conducted experiments with a quantum server and multiple remote users, demonstrating that entangled states can be created among users during distribution, rather than being solely prepared by the server.
- The results show that this method of distributing Gaussian entanglement and steering is effective even with some loss in the communication channel, enabling one-way Gaussian steering for enhanced quantum information processing.
Article Abstract
As two valuable quantum resources, Einstein-Podolsky-Rosen entanglement and steering play important roles in quantum-enhanced communication protocols. Distributing such quantum resources among multiple remote users in a network is a crucial precondition underlying various quantum tasks. We experimentally demonstrate the deterministic distribution of two- and three-mode Gaussian entanglement and steering by transmitting separable states in a network consisting of a quantum server and multiple users. In our experiment, entangled states are not prepared solely by the quantum server, but are created among independent users during the distribution process. More specifically, the quantum server prepares separable squeezed states and applies classical displacements on them before spreading out, and users simply perform local beam-splitter operations and homodyne measurements after they receive separable states. We show that the distributed Gaussian entanglement and steerability are robust against channel loss. Furthermore, one-way Gaussian steering is achieved among users that is useful for further directional or highly asymmetric quantum information processing.
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| http://dx.doi.org/10.1103/PhysRevLett.125.260506 | DOI Listing |
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Department of Physics, Federal University of Paraná, P.O. Box 19044, Curitiba 81531-980, Paraná, Brazil.
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