Continuous-variable spatial entanglement for bright optical beams

2005/01/25 by Magnus T. L. Hsu, Warwick P. Bowen, Nicolas Treps +1 · 25 citations
Computer Science · Physics and Astronomy · #Beam (structure) #Beam splitter #Cold Atom Physics and Bose-Einstein Condensates #Homodyne detection #Laser #Momentum (technical analysis) #Optics #Orbital Angular Momentum in Optics #Physics #Position (finance) #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #quant-ph

paper · pdf · doi:10.1103/physreva.72.013802

published in Physical Review A 72(1) (American Physical Society) · 7 pages, 3 figures, submitted to PRA

arxiv created 2005/01/25 · openalex publication_date 2005/07/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A light beam is said to be position squeezed if its position can be determined to an accuracy beyond the standard quantum limit. We identify the position and momentum observables for bright optical beams and show that position and momentum entanglement can be generated by interfering two position, or momentum, squeezed beams on a beam splitter. The position and momentum measurements of these beams can be performed using a homodyne detector with local oscillator of an appropriate transverse beam profile. We compare this form of spatial entanglement with split detection-based spatial entanglement.

Citations

• Nano-displacement measurements using spatially multimode squeezed light
• Surpassing the Standard Quantum Limit for Optical Imaging Using Nonclassical Multimode Light
• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Ghost Imaging with Thermal Light: Comparing Entanglement and ClassicalCorrelation
• Inseparability Criterion for Continuous Variable Systems