Related Experiment Video
Updated: Apr 25, 2026
10:40
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
7.0K
Phonon-induced spin-spin interactions in diamond nanostructures: application to spin squeezing
S D Bennett1, N Y Yao1, J Otterbach1
1Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA.
Physical Review Letters
|August 29, 2014
Summary
We introduce a new method for long-range spin interactions in diamond using mechanical resonators. This phonon-mediated approach enables spin squeezing for quantum technologies.
Area of Science:
- Quantum physics
- Materials science
- Nanotechnology
Background:
- Nitrogen-vacancy (NV) centers in diamond are promising qubits.
- Achieving long-range interactions between NV centers is crucial for quantum applications.
- Controlling spin ensembles requires robust interaction mechanisms.
Purpose of the Study:
- To propose and analyze a novel mechanism for long-range spin-spin interactions in diamond nanostructures.
- To explore phonon-mediated interactions between NV centers.
- To investigate the generation of squeezed spin states.
Main Methods:
- Coupling electronic spins of NV centers via strain to a diamond mechanical nanoresonator.
- Analyzing phonon-mediated effective spin-spin interactions.
- Simulating spin squeezing under realistic experimental conditions.
Main Results:
- Demonstrated a novel phonon-mediated mechanism for effective spin-spin interactions.
- Showed that spin dephasing and relaxation can be suppressed.
- Achieved substantial spin squeezing in a spin ensemble.
Conclusions:
- The proposed mechanism enables robust, long-range spin interactions in diamond nanostructures.
- This approach facilitates the generation of squeezed spin states.
- Potential applications include spin-ensemble magnetometry and quantum information processing.
More Related Videos
Related Concept Videos
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
1.5K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.5K
01:08NMR Spectroscopy: Spin–Spin Coupling
3.4K
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...
3.4K
01:03Atomic Nuclei: Nuclear Spin State Overview
1.9K
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 one, the...
1.9K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.3K
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...
1.3K
01:17Spin–Spin Coupling: One-Bond Coupling
1.2K
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,...
1.2K
01:22Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)
1.3K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the...
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the...
1.3K