Related Experiment Video
Updated: Feb 14, 2026
14:20
Absolute Quantum Yield Measurement of Powder Samples
Published on: May 12, 2012
28.8K
Storing quantum information in spins and high-sensitivity ESR
John J L Morton1, Patrice Bertet2
1London Centre for Nanotechnology, UCL, London WC1H 0AH, United Kingdom; Dept. of Electronic and Electrical Engineering, UCL, London WC1E 7JE, United Kingdom.
Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|February 8, 2018
Summary
Researchers are developing microwave quantum memories using electron spin systems and superconducting resonators. This technology aims to store quantum information from single microwave photons, advancing quantum computing and communications.
Area of Science:
- Quantum information science
- Quantum computing and communications
- Solid-state physics
Background:
- Electron spin systems offer promising avenues for quantum information storage.
- Diverse systems like molecular radicals, point defects, and quantum dots are explored.
- High spin coherence times and addressability are key advantages.
Purpose of the Study:
- To explore the realization of microwave quantum memories.
- To investigate the use of electron spin ensembles coupled to microwave resonators.
- To discuss requirements for superconducting resonators in quantum memory applications.
Main Methods:
- Utilizing electron spin ensembles strongly coupled to microwave resonators.
- Investigating superconducting resonators with tunable frequencies.
- Applying inductively-detected electron spin resonance for sensitivity measurements.
Main Results:
- Electron spin systems can store coherent states of single microwave photons.
- Superconducting resonators can be tuned to achieve resonance with spins.
- Progress in superconducting quantum devices enhances sensitivity in electron spin resonance.
Conclusions:
- Microwave quantum memories are feasible using coupled spin ensembles and resonators.
- Advancements in superconducting quantum devices improve sensitivity for detecting few spins.
- The field shows promise for scalable quantum information processing and sensing.
Related Concept Videos
02:43Quantum Numbers
52.4K
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.
52.4K
02:45The Quantum-Mechanical Model of an Atom
59.8K
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.
59.8K
01:12Energy Stored in a Capacitor
4.8K
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.
4.8K
01:08NMR Spectroscopy: Spin–Spin Coupling
3.3K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
3.3K
01:17Spin–Spin Coupling: One-Bond Coupling
1.5K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.5K
01:08Spin–Spin Coupling Constant: Overview
1.5K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.5K