Entanglement of photonic modes from a continuously driven two-level system
Abstract The ability to generate entangled states of light is a key primitive for quantum communication and distributed quantum computation. Continuously driven sources, including those based on spontaneous parametric downconversion, are usually probabilistic, whereas deterministic sources require a...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-04-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-025-00995-1 |
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| _version_ | 1849325882966016000 |
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| author | Jiaying Yang Ingrid Strandberg Alejandro Vivas-Viaña Akshay Gaikwad Claudia Castillo-Moreno Anton Frisk Kockum Muhammad Asad Ullah Carlos Sánchez Muñoz Axel Martin Eriksson Simone Gasparinetti |
| author_facet | Jiaying Yang Ingrid Strandberg Alejandro Vivas-Viaña Akshay Gaikwad Claudia Castillo-Moreno Anton Frisk Kockum Muhammad Asad Ullah Carlos Sánchez Muñoz Axel Martin Eriksson Simone Gasparinetti |
| author_sort | Jiaying Yang |
| collection | DOAJ |
| description | Abstract The ability to generate entangled states of light is a key primitive for quantum communication and distributed quantum computation. Continuously driven sources, including those based on spontaneous parametric downconversion, are usually probabilistic, whereas deterministic sources require accurate timing of the control fields. Here, we experimentally generate entangled photonic modes by continuously exciting a quantum emitter - a superconducting qubit - with a coherent drive, taking advantage of mode matching in the time and frequency domain. Using joint quantum state tomography and logarithmic negativity, we show that entanglement is generated between modes extracted from the two sidebands of the resonance fluorescence spectrum. Because the entangled photonic modes are perfectly orthogonal, they can be transferred into distinct quantum memories. Our approach can be utilized to distribute entanglement at a high rate in various physical platforms, with applications in waveguide quantum electrodynamics, distributed quantum computing, and quantum networks. |
| format | Article |
| id | doaj-art-3755805652cc44c7b83d2a05f9967df2 |
| institution | Kabale University |
| issn | 2056-6387 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Information |
| spelling | doaj-art-3755805652cc44c7b83d2a05f9967df22025-08-20T03:48:18ZengNature Portfolionpj Quantum Information2056-63872025-04-0111111110.1038/s41534-025-00995-1Entanglement of photonic modes from a continuously driven two-level systemJiaying Yang0Ingrid Strandberg1Alejandro Vivas-Viaña2Akshay Gaikwad3Claudia Castillo-Moreno4Anton Frisk Kockum5Muhammad Asad Ullah6Carlos Sánchez Muñoz7Axel Martin Eriksson8Simone Gasparinetti9Department of Microtechnology and Nanoscience, Chalmers University of TechnologyDepartment of Microtechnology and Nanoscience, Chalmers University of TechnologyDepartamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de MadridDepartment of Microtechnology and Nanoscience, Chalmers University of TechnologyDepartment of Microtechnology and Nanoscience, Chalmers University of TechnologyDepartment of Microtechnology and Nanoscience, Chalmers University of TechnologyEricsson Research, Ericsson ABDepartamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de MadridDepartment of Microtechnology and Nanoscience, Chalmers University of TechnologyDepartment of Microtechnology and Nanoscience, Chalmers University of TechnologyAbstract The ability to generate entangled states of light is a key primitive for quantum communication and distributed quantum computation. Continuously driven sources, including those based on spontaneous parametric downconversion, are usually probabilistic, whereas deterministic sources require accurate timing of the control fields. Here, we experimentally generate entangled photonic modes by continuously exciting a quantum emitter - a superconducting qubit - with a coherent drive, taking advantage of mode matching in the time and frequency domain. Using joint quantum state tomography and logarithmic negativity, we show that entanglement is generated between modes extracted from the two sidebands of the resonance fluorescence spectrum. Because the entangled photonic modes are perfectly orthogonal, they can be transferred into distinct quantum memories. Our approach can be utilized to distribute entanglement at a high rate in various physical platforms, with applications in waveguide quantum electrodynamics, distributed quantum computing, and quantum networks.https://doi.org/10.1038/s41534-025-00995-1 |
| spellingShingle | Jiaying Yang Ingrid Strandberg Alejandro Vivas-Viaña Akshay Gaikwad Claudia Castillo-Moreno Anton Frisk Kockum Muhammad Asad Ullah Carlos Sánchez Muñoz Axel Martin Eriksson Simone Gasparinetti Entanglement of photonic modes from a continuously driven two-level system npj Quantum Information |
| title | Entanglement of photonic modes from a continuously driven two-level system |
| title_full | Entanglement of photonic modes from a continuously driven two-level system |
| title_fullStr | Entanglement of photonic modes from a continuously driven two-level system |
| title_full_unstemmed | Entanglement of photonic modes from a continuously driven two-level system |
| title_short | Entanglement of photonic modes from a continuously driven two-level system |
| title_sort | entanglement of photonic modes from a continuously driven two level system |
| url | https://doi.org/10.1038/s41534-025-00995-1 |
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