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Category: quantum physics – Page 305

Combining materials may support unique superconductivity for quantum computing

A new fusion of materials, each with special electrical properties, has all the components required for a unique type of superconductivity that could provide the basis for more robust quantum computing. The new combination of materials, created by a team led by researchers at Penn State, could also provide a platform to explore physical behaviors similar to those of mysterious, theoretical particles known as chiral Majoranas, which could be another promising component for quantum computing.

The new study appears in the journal Science. The work describes how the researchers combined the two magnetic materials in what they called a critical step toward realizing the emergent interfacial , which they are currently working toward.

Superconductors—materials with no —are widely used in digital circuits, the powerful magnets in imaging (MRI) and , and other technology where maximizing the flow of electricity is crucial.

New techniques for making qubits out of erbium

Qubits are the building block for quantum technology, and finding or building qubits that are stable and easily manipulated is one of the central goals of quantum technology research. Scientists have found that an atom of erbium—a rare-earth metal sometimes used in lasers or to color glass—can be a very effective qubit.

To make qubits, erbium atoms are placed in “host materials,” where the erbium atoms replace some of the material’s original atoms. Two research groups—one at quantum startup memQ, a Chicago Quantum Exchange corporate partner, and one at the US Department of Energy’s Argonne National Laboratory, a CQE member—have used different host materials for erbium to advance , demonstrating the versatility of this kind of qubit and highlighting the importance of materials science to quantum computing and quantum communication.

The two projects address challenges that quantum computing researchers have been trying to solve: engineering multi-qubit devices and extending the amount of time qubits can hold information.

Adiabatic Cooper pair splitter

Cooper-Pair Splitting on Demand.

A proposed device can repeatedly grab pairs of electrons from a superconductor and separate them while preserving their entangled state.

By adiabatically changing the energy levels of two quantum dots, theoreticians predict that it should be possible to control the splitting of Cooper pairs from a superconductor. Such an adiabatic Cooper pair splitter could serve as an on-demand source of entangled electrons in future solid-state quantum technologies.

Physicists Unlock Quantum Immortality With Revolutionary Time Crystal

Researchers have successfully extended the lifespan of time crystals, confirming a theoretical concept proposed by Frank Wilczek. This marks a significant step forward in quantum physics.

A team from TU Dortmund University recently succeeded in producing a highly durable time crystal that lived millions of times longer than could be shown in previous experiments. By doing so, they have corroborated an extremely interesting phenomenon that Nobel Prize laureate Frank Wilczek postulated around ten years ago and which had already found its way into science fiction movies. The results have now been published in Nature Physics.

Groundbreaking achievement in time crystal research.

Quantum materials: A new state of matter with chiral properties

An international research group has discovered a new state of matter characterized by the existence of a quantum phenomenon called chiral current. These currents are generated on an atomic scale by a cooperative movement of electrons, unlike conventional magnetic materials whose properties originate from the quantum characteristic of an electron known as spin and their ordering in the crystal.

Chirality is a property of extreme importance in science, for example, it is fundamental also to understand DNA. In the discovered, the chirality of the currents was detected by studying the interaction between light and matter, in which a suitably polarized photon can emit an electron from the surface of the material with a well-defined spin state.

The discovery, published in Nature, significantly enriches our knowledge of quantum materials in the search for chiral quantum phases and on the phenomena that occur at the surface of materials.

Unlocking Quantum Superconductivity Mysteries With Ultracold Fermions

Researchers have made a landmark discovery in quantum physics by observing and quantitatively characterizing the many-body pairing pseudogap in unitary Fermi gases, a topic of debate for nearly two decades. This finding not only resolves long-standing questions about the nature of the pseudogap in these gases but also suggests a potential link to the pseudogap observed in high-temperature superconductors. Credit: SciTechDaily.com.

Researchers have conclusively observed the many-body pairing pseudogap in unitary Fermi gases, advancing our understanding of superconductivity mechanisms.

A research team led by Professors Jianwei Pan, Xingcan Yao, and Yu’ao Chen from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences, has for the first time observed and quantitatively characterized the many-body pairing pseudogap in unitary Fermi gases.

Quantum Photonics Leap: Revolutionary Nanocavities Redefine Light Confinement

Dr. Hanan Herzig Sheinfux, from Bar-Ilan University: “What started as a chance discovery, may well open the way to new quantum applications, pushing the boundaries of what we thought was possible.”

In a significant leap forward for quantum nanophotonics, a team of European and Israeli physicists, introduces a new type of polaritonic cavities and redefines the limits of light confinement. This pioneering work, detailed in a study published today (February 6) in Nature Materials, demonstrates an unconventional method to confine photons, overcoming the traditional limitations in nanophotonics.

Physicists have long been seeking ways to force photons into increasingly small volumes. The natural length scale of the photon is the wavelength and when a photon is forced into a cavity much smaller than the wavelength, it effectively becomes more “concentrated.”

2054, Part III: The Singularity

“We’d witness advances like mind-uploading,” B.T. said, and described the process by which the knowledge, analytic skills, intelligence, and personality of a person could be uploaded to a computer chip. “Once uploaded, that chip could be fused with a quantum computer that couples biological with artificial intelligence. If you did this, you’d create a human mind that has a level of computational, predictive, analytic, and psychic skill incomprehensibly higher than any existing human mind. You’d have the mind of God. That online intelligence could then create real effects in the physical world. God’s mind is one thing, but what makes God God is that He cometh to earth —”

When B.T. said earth, he made a sweeping gesture, like a faux preacher, and in his excitement, he knocked over Lily’s glass of wine. A waiter promptly appeared with a handful of napkins, sopping up the mess. B.T. waited for the waiter to leave.

“Don’t give me that look.”