Secure quantum remote state preparation of squeezed microwave states
| Autor: | Michael Fischer, M. Xu, Rudolf Gross, Mikel Sanz, Yasunobu Nakamura, Kunihiro Inomata, Enrique Solano, A. Marx, Frank Deppe, Stefan Pogorzalek, Kirill G. Fedorov, A. Parra-Rodriguez, E. Xie |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Quantum information Computer science Science FOS: Physical sciences General Physics and Astronomy 02 engineering and technology Quantum entanglement Article General Biochemistry Genetics and Molecular Biology mesoscale and nanoscale physics Superconductivity (cond-mat.supr-con) 03 medical and health sciences Quantum state Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Electronic engineering lcsh:Science Quantum information science Quantum Quantum network Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity superconductivity Quantum Physics General Chemistry 021001 nanoscience & nanotechnology ddc 030104 developmental biology quantum physics Superconducting devices lcsh:Q State (computer science) Quantum Physics (quant-ph) 0210 nano-technology Realization (systems) Microwave |
| Zdroj: | Addi. Archivo Digital para la Docencia y la Investigación instname Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Quantum communication protocols based on nonclassical correlations can be more efficient than known classical methods and offer intrinsic security over direct state transfer. In particular, remote state preparation aims at the creation of a desired and known quantum state at a remote location using classical communication and quantum entanglement. We present an experimental realization of deterministic continuous-variable remote state preparation in the microwave regime over a distance of 35 cm. By employing propagating two-mode squeezed microwave states and feedforward, we achieve the remote preparation of squeezed states with up to 1.6 dB of squeezing below the vacuum level. Finally, security of remote state preparation is investigated by using the concept of the one-time pad and measuring the von Neumann entropies. We find nearly identical values for the entropy of the remotely prepared state and the respective conditional entropy given the classically communicated information and, thus, demonstrate close-to-perfect security. Continuous-variable remote state preparation in the microwave domain would allow to leverage the superconducting technology for quantum networks applications. Here, the authors show how to deterministically prepare squeezed Gaussian states across 35 cm using previously shared entanglement. |
| Databáze: | OpenAIRE |
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