Scalable spin–photon entanglement by time-to-polarization conversion
| Autor: | Jörg Schmiedmayer, Rui Vasconcelos, Philip Walther, Georg Wachter, Michael Trupke, Sarah Reisenbauer, Daniel Wirtitsch, Cameron Salter |
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| Rok vydání: | 2020 |
| Předmět: |
Photon
Quantum information Computer Networks and Communications Computer science Physical system 02 engineering and technology Quantum entanglement 01 natural sciences lcsh:QA75.5-76.95 Quantum logic Photon entanglement 0103 physical sciences Computer Science (miscellaneous) Electronic engineering Single photons and quantum effects 010306 general physics Quantum computer Quantum optics Quantum network Statistical and Nonlinear Physics 021001 nanoscience & nanotechnology lcsh:QC1-999 Interferometry Computational Theory and Mathematics lcsh:Electronic computers. Computer science 0210 nano-technology lcsh:Physics |
| Zdroj: | npj Quantum Information, Vol 6, Iss 1, Pp 1-5 (2020) |
| ISSN: | 2056-6387 |
| Popis: | The realization of quantum networks and quantum computers relies on the scalable generation of entanglement, for which spin-photon interfaces are strong candidates. Current proposals to produce entangled-photon states with such platforms place stringent requirements on the physical properties of the photon emitters, limiting the range and performance of suitable physical systems. We propose a scalable protocol, which significantly reduces the constraints on the emitter. We use only a single optical transition and an asymmetric polarizing interferometer. This device converts the entanglement from the experimentally robust time basis via a path degree of freedom into a polarization basis, where quantum logic operations can be performed. The fundamental unit of the proposed protocol is realized experimentally in this work, using a nitrogen-vacancy center in diamond. This classically assisted protocol greatly widens the set of physical systems suited for scalable entangled-photon generation and enables performance enhancement of existing platforms. |
| Databáze: | OpenAIRE |
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