Entanglement of photonic modes from a continuously driven two-level system
Artikel i vetenskaplig tidskrift, 2025
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.
Författare
Jiaying Yang
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Ericsson AB
Ingrid Strandberg
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Alejandro Vivas-Viaña
Universidad Autonoma de Madrid (UAM)
Consejo Superior de Investigaciones Científicas (CSIC)
Akshay Gaikwad
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Claudia Castillo-Moreno
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Anton Frisk Kockum
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Muhammad Asad Ullah
Ericsson AB
Carlos Sánchez Munõz
Consejo Superior de Investigaciones Científicas (CSIC)
Universidad Autonoma de Madrid (UAM)
Axel Martin Eriksson Lundström
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Simone Gasparinetti
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
npj Quantum Information
20566387 (eISSN)
Vol. 11 1 69Experimental Search for Quantum Advantages in Thermodynamics (ESQuAT)
Europeiska kommissionen (EU) (EC/HE/101041744), 2023-01-01 -- 2027-12-31.
Stora atomer - en ny regim för kvantoptik
Vetenskapsrådet (VR) (2019-03696), 2020-01-01 -- 2023-12-31.
Ämneskategorier (SSIF 2025)
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
Annan fysik
DOI
10.1038/s41534-025-00995-1