Related Experiment Video
Updated: Mar 3, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.4K
Quantum Storage with Flat Bands
Carlo Danieli1, Jie Liu2, Rudolf A Römer3
1Institute for Complex Systems, National Research Council (ISC-CNR), Via dei Taurini 19, 00185 Rome, Italy.
Physical Review Letters
|March 1, 2026
Summary
Researchers developed a new method to create stable, localized states for quantum memory. This technique uses edge-injected waves and potentials to form compact excitations in flat-band systems, enhancing quantum storage capabilities.
Area of Science:
- Quantum physics
- Condensed matter physics
- Photonics
Background:
- Robust quantum storage requires long-lived, spatially localized states.
- Flat-band lattices offer unique properties for quantum applications but controlling localized states is challenging.
Purpose of the Study:
- To introduce a novel method for the targeted creation of compact excitations in flat-band lattices.
- To enable the formation of stable, spatially localized states for quantum memory applications.
Main Methods:
- Injecting in-plane radiation waves from the system's edge.
- Applying a localized on-site potential at the desired storage position.
- Inducing hybridization between flat-band compact localized states and resonant dispersive plane waves.
Main Results:
- Successful formation of spatially compact, stable excitations.
- Experimental validation in photonic waveguide arrays (diamond chain and 1D Lieb ladder).
- Demonstrated a versatile mechanism applicable to various flat-band systems.
Conclusions:
- The proposed method effectively creates localized states suitable for quantum memory.
- The technique leverages hybridization in flat-band systems for robust quantum storage.
- This approach has broad applicability across different quantum platforms.
Related Concept Videos
01:01Energy Bands in Solids
2.2K
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
2.2K
02:35Band Theory
17.4K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
17.4K
02:43Quantum Numbers
52.9K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
52.9K
01:12Energy Stored in a Capacitor
4.9K
When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
4.9K
01:22Semiconductors
1.7K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
1.7K
01:10Energy Stored in Capacitors
1.2K
A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
1.2K