Related Experiment Video
Updated: Jul 4, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Subarea law of entanglement in nodal fermionic systems
Letian Ding1, Noah Bray-Ali, Rong Yu
1Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, USA.
Abstract:
We investigate the subarea-law scaling behavior of the block entropy in bipartite fermionic systems which do not have a finite Fermi surface. It is found that in gapped regimes the leading subarea term is a negative constant, whereas in critical regimes with point nodes the leading subarea law is a logarithmic additive term. At the phase boundary that separates the critical and noncritical regimes, the subarea scaling shows power-law behavior.
Related Concept Videos
The Pauli Exclusion Principle
First Law: Particles in Two-dimensional Equilibrium
Newton's first law tells us about the...
First Law: Particles in One-dimensional Equilibrium
Divergence and Curl of Magnetic Field
Nodal Analysis with Voltage Sources
Consider a circuit that contains four resistors and two voltage sources, as shown in Figure 1. One of these voltage sources is connected between a...
Second Uniqueness Theorem
In contrast, consider that the electric field is non-unique and apply Gauss's law in divergence form in the region between the conductors and the integral form to the surface...
