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Magnetic resonance (quantum mechanics) - Wikipedia

https://en.wikipedia.org/wiki/Magnetic_resonance_(quantum_mechanics)
In quantum mechanics, magnetic resonance is a resonant effect that can appear when a magnetic dipole is exposed to a static magnetic field and perturbed with another, oscillating electromagnetic field. Due to the static field, the dipole can assume a number of discrete energy eigenstates, depending on the value of its angular momentum

How the Physics of Resonance Shapes Reality | Quanta Magazine

https://www.quantamagazine.org/how-the-physics-of-resonance-shapes-reality-20220126/
Resonance is a ubiquitous phenomenon that underlies aspects of the world as diverse as music, nuclear fusion, and subatomic particles. Learn how resonance manifests in different settings, from everyday life down to the smallest scales, and how it shapes the very existence of matter.

The Feynman Lectures on Physics Vol. I Ch. 23: Resonance

https://www.feynmanlectures.caltech.edu/I_23.html
The recording of this lecture is missing from the Caltech Archives. 23 Resonance. 23-1 Complex numbers and harmonic motion. In the present chapter we shall continue our discussion of the harmonic oscillator and, in particular, the forced harmonic oscillator, using a new technique in the analysis. In the preceding chapter we introduced the

Quantum squeezing in a nonlinear mechanical oscillator

https://www.nature.com/articles/s41567-024-02545-6
When the resonance condition ω 1 + ω 2 = 2ω a is fulfilled, the qubit nonlinearity mediates a four-wave-mixing process that results in a two-phonon drive (a †2 + a 2).In addition, the phonon

Quantum sensors for biomedical applications - Nature

https://www.nature.com/articles/s42254-023-00558-3
Aslam, N. et al. Nanoscale nuclear magnetic resonance with quantum sensors enhanced by nanostructures. In Quantum 2.0 Conference and Exhibition (2022) Paper QW4C.3 (Optica Publishing Group, 2022).

Quantum resonances near absolute zero | Science

https://www.science.org/doi/10.1126/science.abb8020
Accurate quantum dynamics calculations are in excellent agreement with experimental results. Particularly interesting is that the resonances could only be accurately described with a new NO-He PES at the CCSDT(Q) level (coupled clusters singles, doubles, triples, and quadruples), demonstrating the exceptionally high level of the resonance model, characterized by both experiment and theory, for

[0902.4061] A Primer on Resonances in Quantum Mechanics - arXiv.org

https://arxiv.org/abs/0902.4061
A Primer on Resonances in Quantum Mechanics. O. Rosas-Ortiz, N. Fernandez-Garcia, Sara Cruz y Cruz. After a pedagogical introduction to the concept of resonance in classical and quantum mechanics, some interesting applications are discussed. The subject includes resonances occurring as one of the effects of radiative reaction, the resonances

Resonance | Wave-Particle Duality, Quantum Mechanics & Interference

https://www.britannica.com/science/resonance-particle-physics
resonance, in particle physics, an extremely short-lived phenomenon associated with subatomic particles called hadrons that decay via the strong nuclear force.This force is so powerful that it allows resonances to exist only for the amount of time it takes light to cross each such "object." A resonance occurs when the net energy of the colliding subatomic particles is just enough to

Spin torque-driven electron paramagnetic resonance of a ... - Science

https://www.science.org/doi/10.1126/science.adh4753
Control over quantum systems is typically achieved by time-dependent electric or magnetic fields. Alternatively, electronic spins can be controlled by spin-polarized currents. ... With the excitation of electron paramagnetic resonance, we established dynamic control of single spins by spin torque using a local electric current. In addition, our

Wide-Band Unambiguous Quantum Sensing via Geodesic Evolution

https://link.aps.org/doi/10.1103/PhysRevLett.132.250801
We present a quantum sensing technique that utilizes a sequence of $\ensuremath{\pi}$ pulses to cyclically drive the qubit dynamics along a geodesic path of adiabatic evolution. This approach effectively suppresses the effects of both decoherence noise and control errors while simultaneously removing unwanted resonance terms, such as higher harmonics and spurious responses commonly encountered

12.3: Spin Magnetic Resonance - Physics LibreTexts

https://phys.libretexts.org/Bookshelves/Quantum_Mechanics/Introductory_Quantum_Mechanics_(Fitzpatrick)/12%3A_Time-Dependent_Perturbation_Theory/12.03%3A_Spin_Magnetic_Resonance
The rotating magnetic field usually represents the magnetic component of an electromagnetic wave propagating along the z z -axis. In this system, the electric component of the wave has no effect. The Hamiltonian is written. H = −μ ⋅B = H0 +H1, (12.3.2) (12.3.2) H = − μ ⋅ B = H 0 + H 1, where.

Quantum Approaches to Consciousness - Stanford Encyclopedia of Philosophy

https://plato.stanford.edu/entries/qt-consciousness/
Quantum Approaches to Consciousness. First published Tue Nov 30, 2004; substantive revision Mon May 13, 2024. It is widely accepted that consciousness or, more generally, mental activity is in some way correlated to the behavior of the material brain. Since quantum theory is the most fundamental theory of matter that is currently available, it

Determining the nature of quantum resonances by probing elastic and

https://www.nature.com/articles/s41557-020-00578-x
A scattering resonance, or temporary low-energy collision complex, can be formed by various mechanisms 1,2.Trapping of the colliding particles can occur due to the transfer of relative kinetic

An alternative way to manipulate quantum states | ETH Zurich

https://ethz.ch/en/news-and-events/eth-news/news/2024/06/an-alternative-way-to-manipulate-quantum-states.html
Researchers at ETH Zurich have shown that quantum states of single electron spins can be controlled by currents of electrons whose spins are evenly aligned. ... also known as electron paramagnetic resonance, was developed already in the mid-1940's and has since been used in different fields such as materials research, chemistry and biophysics

[2309.16281] Quantum Resonance viewed as Weak Measurement - arXiv.org

https://arxiv.org/abs/2309.16281
Quantum resonance, i.e., amplification in transition probability available under certain conditions, offers a powerful means for determining fundamental quantities in physics, including the time duration of the second adopted in the SI units and neutron's electric dipole moment which is directly linked to CP violation. We revisit two of the typical examples, the Rabi resonance and the Ramsey

Home - Quantum Science Center

https://www.qscience.org/
The QSC commitment to scientific excellence is fundamentally dependent on maintaining a culture of diversity, inclusion, and equity. The QSC expects all members to build teams that are equitable, diverse, and inclusive, and to foster a professional culture and climate that reflects these values. The Quantum Science Center is ensuring American

DARPA finds quantum computers have promise, problems

https://www.theregister.com/2024/06/24/darpa_quantum_computer_benchmarking_papers/
A paper on nuclear magnetic resonance spectroscopy is more positive, suggesting quantum computers could model phenomena that are currently hard to analyze with classical machines. ... Quantum enthusiasts may take heart from knowing that the papers are yet to be peer-reviewed - meaning they could be wrong, and a land of quantum unicorns and

An alternative way to manipulate quantum states - Phys.org

https://phys.org/news/2024-06-alternative-quantum-states.html
An alternative way to manipulate quantum states. by Oliver Morsch, ETH Zurich. Left: Single pentacene molecules (yellow) on the insulating layer (blue). Right: Electrons with spins aligned in

Microsoft's New Release Taps Generative AI, Quantum to Boost Molecular

https://thequantuminsider.com/2024/06/19/microsofts-new-release-taps-generative-ai-quantum-to-boost-molecular-research/
June 19, 2024. Insider Brief. Microsoft is releasing two new features to enhance the productivity and accessibility of research in chemistry and materials science. These updates are in line with the company's overall mission to empower global scientific advances by leveraging AI, quantum and cloud high-performance computing (HPC).

Quantum theory of resonances: calculating energies, widths and cross

https://www.sciencedirect.com/science/article/pii/S0370157398000027
A resonance state is defined as a long-lived state of a system which has sufficient energy to break-up into two or more subsystems. In elastic and inelastic scattering experiments the subsystems are associated with the scattering particle and the target. ... The quantum equations of motion are reduced to the classical one as ℏ→0. While ℏ

The Easy Part of the Hard Problem: A Resonance Theory of Consciousness

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6834646/
The potential complementary relationship between quantum resonance and electrical resonance requires considerably more research, and we can't say much about how these two forces interact at the organic scale, or whether they are in some sense the same resonance phenomenon with different manifestations - they are perhaps two sides of the

Controlling the dimension of the quantum resonance in CdTe ... - Nature

https://www.nature.com/articles/s41467-020-19337-0
2D quantum resonance in QD monolayers. We used the NAC-capped CdTe QDs with a diameter d = 3.4 ± 0.3 nm.The typical transmission electron microscopy (TEM) image and size histogram are shown in

Resonance (chemistry) - Wikipedia

https://en.wikipedia.org/wiki/Resonance_(chemistry)
In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or polyatomic ions by the combination of several contributing structures ... The mechanism of resonance was introduced into quantum mechanics by Werner Heisenberg in 1926 in a discussion of the quantum states of the helium atom.

Does Quantum Resonance Spectrometry Work? | Discover Magazine

https://www.discovermagazine.com/the-sciences/does-quantum-resonance-spectrometry-work
This is my fourth post on 'quantum resonance spectrometry' (QRS), a strange medical technology that seems to be becoming increasingly popular in China. Proponents claim that QRS can quickly and painlessly diagnose almost any disease. However, as I discussed last time, the technology has a dubious history.

Strings and Quantum Gravity - University of Tennessee

http://aesop.phys.utk.edu/
Ever since the discovery of quantum mechanics, a tremendous amount of energy has been spent by physicists, including Einstein himself, in an effort to reconcile the theory of general relativity, which describes gravity, and quantum mechanics, which seems to describe everything else. For some odd reason, no quantum mechanical phenomena

The Compton Effect-- Compton Scattering and Gamma Ray Spectroscopy

http://www.phys.utk.edu/labs/modphys/Compton%20Scattering%20Experiment.pdf
The Compton Effect is the quantum theory of the scattering of electromagnetic waves by a charged particle in which a portion of the energy of the electromagnetic wave is given to the charged particle in an elastic, relativistic collision. Compton scattering was discovered in 1922 by Arthur H. Compton (1892-1962) while conducting research on the

JCDD | Free Full-Text | Atrial and Ventricular Involvement in Acute

https://www.mdpi.com/2308-3425/11/7/191
Cardiac magnetic resonance (CMR) is commonly employed to confirm the diagnosis of acute myocarditis (AM). However, the impact of atrial and ventricular function in AM patients with preserved ejection fraction (EF) deserves further investigation. Therefore, the aim of this study was to explore the incremental diagnostic value of combining atrial and strain functions using CMR in patients with

What is Quantum Resonance Spectrometry? | Discover Magazine

https://www.discovermagazine.com/the-sciences/what-is-quantum-resonance-spectrometry
This magnetized quantum life water is a veritable panacea. Zhang says that it can: cure cancerous patients, chronic diseases, complicated diseases, or metal toxic diseases in clinic. Yet regarding the question of how quantum resonance spectrometry actually works, the article is not very informative.

7.4: Formal Charges and Resonance - Chemistry LibreTexts

https://chem.libretexts.org/Courses/Louisville_Collegiate_School/General_Chemistry/LibreTexts_Louisville_Collegiate_School_Chapters%2F%2F07%3A_Chemical_Bonding_and_Molecular_Geometry/LibreTexts%2F%2FLouisville_Collegiate_School%2F%2FChapters%2F%2F07%3A_Chemical_Bonding_and_Molecular_Geometry%2F%2F7.4%3A_Formal_Charges_and_Resonance
Instead, we use the concept of resonance: if two or more Lewis structures with the same arrangement of atoms can be written for a molecule or ion, the actual distribution of electrons is an average of that shown by the various Lewis structures. The actual distribution of electrons in each of the nitrogen-oxygen bonds in \(\ce{NO2-}\) is the

Free download quantum resonance magnetic analyzer software

http://www.qrmanls.com/
The latest quantum resonance magnetic analyzer v4.5.0 Quantum resonance magnetic analyzer collects the weak magnetic field sensors of frequency and energy...View>> [22-03-01] Latest software upgrade For Quantum Resonance Magnetic Analyzer (V2022) [13-11-21] 39 report mini quantum resonance magnetic analyzer