Related Experiment Video
Updated: Sep 13, 2025
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
9.7K
Charging a quantum spin network with superextensive precision
Beatrice Donelli1,2, Stefano Gherardini1,2, Raffaele Marino3
1Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Largo Enrico Fermi 6, 50125 Firenze, Italy.
Physical Review. E
|August 1, 2025
Summary
We developed a cooperative protocol to charge quantum spin networks efficiently. This method uses spin interactions and phase transitions to achieve superior charging precision, outperforming local methods significantly.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Quantum Computing
Background:
- Quantum spin networks store energy in their magnetization.
- Efficiently charging these networks to their highest energy state is crucial for applications.
- Local charging protocols face limitations in precision and scalability.
Purpose of the Study:
- To present a novel cooperative protocol for charging quantum spin networks.
- To achieve superextensive charging precision by leveraging spin-spin interactions and critical phenomena.
- To demonstrate the protocol's advantage over local charging methods.
Main Methods:
- Utilizing spin-spin interactions within the quantum network.
- Exploiting the crossing of a phase transition's critical point.
- Implementing the protocol on the D-Wave Advantage quantum processing unit.
Main Results:
- Achieved superextensive charging precision for quantum spin networks.
- Demonstrated magnetization fluctuations scaling as 1/N, where N is the number of spins.
- Outperformed local charging precision by four orders of magnitude on a D-Wave processor.
Conclusions:
- The cooperative protocol offers a significant precision advantage over local methods.
- The protocol is scalable and effective for charging large quantum spin networks.
- This work advances the capability of energy storage and management in quantum systems.
Related Concept Videos
01:03Atomic Nuclei: Nuclear Spin State Overview
1.1K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
1.1K
01:08NMR Spectroscopy: Spin–Spin Coupling
1.6K
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...
1.6K
01:08Spin–Spin Coupling Constant: Overview
1.0K
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...
1.0K
03:06The Pauli Exclusion Principle
50.2K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
50.2K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.1K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.1K
01:08Atomic Nuclei: Nuclear Spin
2.9K
All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not...
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not...
2.9K