Related Experiment Video
Updated: Oct 30, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Witnessing the survival of time-energy entanglement through biological tissue and scattering media
Daniel J Lum1, Michael D Mazurek2,3, Alexander Mikhaylov4
1National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
Abstract:
We demonstrate the preservation of the time-energy entanglement of near-IR photons through thick biological media (≤1.55 mm) and tissue (≤ 235 μm) at room temperature. Using a Franson-type interferometer, we demonstrate interferometric contrast of over 0.9 in skim milk, 2% milk, and chicken tissue. This work supports the many proposed opportunities for nonclassical light in biological imaging and analyses from sub-shot noise measurements to entanglement-enhanced fluorescence imaging, clearly indicating that the entanglement characteristics of photons can be maintained even after propagation through thick, turbid biological samples.
Related Concept Videos
Interaction of EM Radiation with Matter: Spectroscopy
Entropy within the Cell
Dual Nature of Electromagnetic (EM) Radiation
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the...
Entropy
The First Law of Thermodynamics
Introduction To Survival Analysis
The primary goal of survival analysis is to estimate survival time—the time...

