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Quantum phase change detected on a global scale deep in the Earth

Quantum phase change detected on a global scale deep in the Earth


A diverse team of geophysicists and geophysicists has combined theoretical predictions, simulations and seismic tomography to detect helical changes in the Earth’s mantle.

The interior of the Earth is a mystery, especially at great depths (>660 km). The researchers only have seismic cross-sectional images of this region and to interpret them it is necessary to calculate seismic (acoustic) velocities in minerals at high pressures and temperatures. With these calculations, they can create 3D velocity maps and detect mineralization and temperature of the observed areas. When a phase change occurs in a mineral, such as a change in crystal structure under pressure, scientists observe a change in velocity, and the sharp seismic velocity usually stops.

In 2003, scientists in a laboratory observed a phase change in a new type of ore – a helical change in iron in ferropericolase, the second largest component of the Earth’s crust. A vortex shift or vortex cross-section can occur in minerals such as ferropericulase under external stimuli such as pressure or temperature. Over the next few years, experimental and theoretical groups confirmed this phase shift in both ferrophilic and bridgemanite, the highest stage of the lower shield. But no one knows why or where this happens.

In (a) and (b) addictive cold oceanic plates were found as fast velocities. The plates and blooms produce a homogeneous cross-sectional signal on the S-wave models, but the signal disappears somewhat on the B-wave models. Credit: Columbia Engineering

In 2006, Columbia University engineering professor Renata Wintkovic published her first paper on ferrophilicus, which presented a theory of spin junction in this mineral. Her theory suggested that it happened over a thousand kilometers in the armor. Since then, Winkowitz has been a Professor in the Department of Applied Physics, Applied Mathematics, Earth and Environmental Sciences and the Lamont-Doherty Earth Laboratory. Columbia University, published 13 papers with his team on the topic, exploring the velocities in each possible spin-intersection scenario in Ferroperclase and Bridgemanite, and predicting the properties of these minerals during that intersection. In 2014, Wenskovich focused on quantum mechanical research of objects in the most extreme stages of his research, predicting specifically how planetary objects might detect the vortex phenomenon in seismic tomograms, but seismologists haven’t been able to see it yet.

Columbia Engineering is a multidisciplinary business team, The University of Oslo, Tokyo Institute of Technology, and Intel Corporation, details Wenskovitch’s recent paper on how they now identify the iron spin junction signal, a quantum phase shift deep in the Earth’s mantle. This was achieved by looking at specific regions in the Earth’s mantle where ferrous pH would be expected to be high. The study was published on October 8, 2021 normal contacts.

“This amazing discovery confirms my previous predictions and explains the importance of working with physicists and geophysicists to learn more about what is going on deep in the Earth,” Vintkovic said.

Solenoid change is commonly used in materials used for magnetic recording. If you stretch or shrink a few nanometer-thick layers of a magnetic material, you can change the magnetic properties of the layer and improve the middle recording properties. Ventzkowicz’s new study shows that a similar phenomenon occurs thousands of kilometers inland, as it moves from the nanoscale to the macro scale.

“Moreover, geological simulations show that the helical junction enhances convection in the Earth’s mantle and the movement of tectonic plates.

Many areas still not understood by researchers in the mantle and vortex change are important for understanding velocity, phase stability, etc. From the beginning Calculations based on density functional theory. It develops and uses micro-material simulation techniques to predict seismic velocity and transport properties, particularly in regions near iron, molten, or near melt.

“What is particularly exciting is that our product simulation methods are robustly applicable to related materials—multiferro materials, ferroelectrics, and products at high temperatures in general,” Vintkovic says. “We can improve the analysis of 3D tomograms of the Earth and learn more about how pressures in the Earth’s interior indirectly affect our lives on Earth.”

Note: Grace E. October 2021, normal contacts.
DOI: 10.1038 / s41467-021-26115-z

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