2012/06/30 by Pavel Sekatski, Nicolas Sangouard, Magdalena Stobińska +5 · 3 citations
Computer Science · Physics and Astronomy · #Beam splitter #Coherent states #Laser #Mechanical and Optical Resonators #Photon #Photon entanglement #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum optics #Quantum state #Simplicity #quant-ph
paper · pdf · doi:10.1103/physreva.86.060301
published as Phys. Rev. A 86, 060301 (2012) · 6 pages, 10 figures. v2: Updated version. The corresponding experiment is reported in arXiv:1212.3710. See also arXiv:1306.0843
openalex publication_date 2012/12/03 · arxiv created 2013/07/26 · arxiv updated 2013/07/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Entanglement between macroscopically populated states can easily be created by combining a single photon and a bright coherent state on a beamsplitter. Motivated by the simplicity of this technique, we report on a method using displacement operations in the phase space and basic photon detections to reveal such an entanglement. We show that this eminently feasible approach provides an attractive way for exploring entanglement at various scales, ranging from 1 to 1000 photons. This offers an instructive viewpoint to gain insight into why it is hard to observe quantum features in our macroscopic world.