Entanglement Test on a Microscopic-Macroscopic System

2008/06/13 by F. De Martini, Francesco De Martini, Fabio Sciarrino +1 · 7 citations
Computer Science · Physics and Astronomy · #Covariant transformation #Mechanical and Optical Resonators #Photon #Photon entanglement #Photon polarization #Physics #Polarization (electrochemistry) #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Superposition principle #quant-ph

paper · pdf · doi:10.1103/physrevlett.100.253601

published as Phys. Rev. Lett. 100, 253601 (2008) · 4 pages, 4 figures

arxiv created 2008/06/13 · openalex publication_date 2008/06/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A macrostate consisting of N approximately 3.5x104 photons in a quantum superposition and entangled with a far apart single-photon state (microstate) is generated. Precisely, an entangled photon pair is created by a nonlinear optical process; then one photon of the pair is injected into an optical parametric amplifier operating for any input polarization state, i.e., into a phase-covariant cloning machine. Such transformation establishes a connection between the single photon and the multiparticle fields. We then demonstrate the nonseparability of the bipartite system by adopting a local filtering technique within a positive operator valued measurement.

Citations

• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Quantum Entanglement of a Large Number of Photons
• New High-Intensity Source of Polarization-Entangled Photon Pairs
• Die gegenw�rtige Situation in der Quantenmechanik
• Entanglement of a Pair of Quantum Bits
• Contextual, Optimal, and Universal Realization of the Quantum Cloning Machine and of the NOT Gate
• Realization of an Optimally Distinguishable Multiphoton Quantum Superposition

Cited by

• Cloning entangled photons to scales one can see
• Proposal for exploring macroscopic entanglement with a single photon and coherent states
• Bell-inequality tests with entanglement between an atom and a coherent state in a cavity
• Macroscopic quantum states: Measures, fragility, and implementations
• Genuine multipartite nonlocality of entangled thermal states
• Decoherence, environment-induced superselection, and classicality of a macroscopic quantum superposition generated by quantum cloning
• Colloquium: Multiparticle quantum superpositions and the quantum-to-classical transition

Related

• Entanglement and Non-locality in a Micro-Macroscopic system
• Hybrid methods for witnessing entanglement in a microscopic-macroscopic system
• Macroscopic polarization entanglement and loophole-free Bell inequality test
• Quantum Entanglement of a Large Number of Photons
• Entangled photon detection and ephemeral space-like Schrödinger cat states