Related Experiment Video
Updated: May 30, 2025

Method to Measure Tone of Axial and Proximal Muscle
Published on: December 14, 2011
Dual opposing quadrature-PT symmetry
Wencong Wang1, Jacob Kokinda2, Jiazhen Li2
1Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China.
Abstract:
Our recent research on type-I quadrature parity-time (PT) symmetry, utilizing an open twin-beam system, not only enables observing genuine quantum photonic PT symmetry amid phase-sensitive amplification (PSA) and loss in the presence of Langevin noise but also reveals an additional classical-to-quantum (C2Q) transition in noise fluctuations. In contrast to the previous setup, our exploration of an alternative system assuming no loss involves a type-II PSA-only scheme. This scheme facilitates dual opposing quadrature-PT symmetry, offering a comprehensive and complementary comprehension of C2Q transitions and PT-enhanced quantum sensing with optimal performance in the symmetry unbroken region. Furthermore, our investigation into the quantum correlation with the Einstein-Podolsky-Rosen criteria uncovers previously unexplored connections between PT symmetry and nonclassicality, as well as quantum entanglement within the continuous-variable framework.
Related Concept Videos
Gauss's Law: Planar Symmetry
Eccentric Axial Loading in a Plane of Symmetry
Gauss's Law: Cylindrical Symmetry
Symmetric Member in Bending
Symmetry in Maxwell's Equations
Gauss's Law: Spherical Symmetry

