High-photon-number path entanglement in the interference of spontaneously down-converted photon pairs with coherent laser light

2007/05/31 by Holger F. Hofmann, Takafumi Ono · 6 citations
Computer Science · Physics and Astronomy · #Beam splitter #Coherence (philosophical gambling strategy) #Coherence time #Computer science #Interference (communication) #Laser #Optics #Orbital Angular Momentum in Optics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum optics #quant-ph

paper · pdf · doi:10.1103/physreva.76.031806

published as Phys. Rev. A 76, 031806(R) (2007) · 5 pages, including 2 figures and 1 table, final version for publication as rapid communication in Phys. Rev. A

arxiv created 2007/08/23 · openalex publication_date 2007/09/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We show that the quantum interference between down-converted photon pairs and photons from coherent laser light can produce a maximally path entangled N-photon output component with a fidelity greater than 90% for arbitrarily high photon numbers. A simple beam splitter operation can thus transform the two-photon coherence of down-converted light into an almost optimal N-photon coherence.

Citations

• Inseparability Criteria for Continuous Bipartite Quantum States
• Quantum-enhanced measurements: beating the standard quantum limit
• Creation of large-photon-number path entanglement conditioned on photodetection
• Entanglement Conditions for Two-Mode States
• Generation of highly nonclassicaln-photon polarization states by superbunching at a photon bottleneck

Cited by

• Coherent-light-boosted, sub-shot noise, quantum interferometry
• Scalable Spatial Superresolution Using Entangled Photons
• Superposed coherent states improve fidelity of NOON states generated in post-selection
• Entanglement and phase properties of noisy NOON states
• Sub-Rayleigh Lithography Using High Flux Loss-Resistant Entangled States of Light
• Parity detection achieves the Heisenberg limit in interferometry with coherent mixed with squeezed vacuum light

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