Related Experiment Video
Updated: Mar 7, 2026
09:19
Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
Published on: July 29, 2013
12.0K
Quantum non-Markovianity induced by Anderson localization.
Salvatore Lorenzo1,2, Federico Lombardo3, Francesco Ciccarello3,4
1Quantum Technology Lab, Dipartimento di Fisica, Università degli Studi di Milano, 20133 Milano, Italy.
Scientific Reports
|February 17, 2017
Summary
Disordered quantum systems exhibit Anderson localization, preventing free excitation propagation. This study links this localization to non-Markovian atomic dynamics and quantum information backflow in coupled-cavity arrays.
Area of Science:
- Quantum physics
- Condensed matter physics
- Quantum information science
Background:
- Excitations in disordered lattices localize due to destructive interference (Anderson localization).
- Atomic interactions with disordered lattices lead to non-trivial excitation exchange and quantum information backflow.
- This backflow is a signature of non-Markovian dynamics.
Purpose of the Study:
- Investigate quantum emitter dynamics coupled to a disordered uniform coupled-cavity array (CCA).
- Explore the relationship between Anderson localization in CCAs and non-Markovian atomic dynamics.
- Characterize quantum information backflow as a measure of non-Markovianity.
Main Methods:
- Modeling a quantum emitter (atom) weakly coupled to a uniform CCA.
- Introducing static disorder into the CCA to induce Anderson localization of field normal modes.
- Analyzing atomic dynamics and quantum information backflow under disordered conditions.
Main Results:
- Disorder in the CCA leads to Anderson-localized field modes.
- This localization induces non-Markovian atomic dynamics.
- A functional relationship is established between quantum non-Markovianity and CCA localization.
- Atomic dynamics are well-described by a phenomenological model involving a single mode and a Markovian bath.
Conclusions:
- Anderson localization in CCAs drives non-Markovian quantum dynamics for coupled emitters.
- Quantum information backflow serves as a robust indicator of non-Markovianity in such systems.
- The findings offer insights into controlling quantum dynamics in disordered photonic structures.
Related Concept Videos
02:45The Quantum-Mechanical Model of an Atom
60.7K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
60.7K
01:04IR Absorption Frequency: Delocalization
1.6K
Electron delocalization refers to the distribution of electrons across multiple atoms within a molecule rather than being confined to a single atom or bond. This phenomenon is common in systems with conjugated bonds—structures where alternating single and double bonds allow π-electrons to move freely across the network. The movement of electrons stabilizes the molecule and can affect various chemical properties, including vibrational frequencies observed in IR spectroscopy.
In IR...
In IR...
1.6K
01:10First Law: Particles in One-dimensional Equilibrium
8.3K
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...
8.3K
01:23Atomic Nuclei: Nuclear Relaxation Processes
1.3K
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis.
1.3K
01:27Inductive Effects on Chemical Shift: Overview
2.4K
The protons in unsubstituted alkanes are strongly shielded with chemical shifts below 1.8 ppm. Methine, methylene, and methyl protons appear at approximately 1.7, 1.2 and 0.7 ppm, while the proton signal from methane appears at 0.23 ppm. An electronegative substituent, such as chlorine, withdraws the electron density from the protons, increasing their chemical shift. Progressive substitution of the hydrogens in methane by chlorine shifts the proton signals increasingly downfield, to 3.05 ppm in...
2.4K
01:18First Law: Particles in Two-dimensional Equilibrium
16.9K
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...
Newton's first law tells us about...
16.9K