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Category: quantum physics – Page 73

New device is a key step to quantum computers by allowing direct communication between processors

If quantum computers are to fulfill the promise of solving problems faster or which are too complex for classical supercomputers, then quantum information needs to be communicated between multiple processors.

Modern computers have different interconnected components such as a memory chip, a Central Processing Unit and a General Processing Unit. These need to communicate for a computer to function.

Current attempts to interconnect superconducting quantum processors use “point-to-point” connectivity. This means they require a series of transfers between nodes, compounding errors.

50 Years Later, Scientists Just Found a Quantum “Butterfly” Hiding in Graphene

Physicists at Princeton stumbled upon a mysterious quantum pattern hidden in twisted graphene — something theorized nearly 50 years ago but never seen before. What they found wasn’t part of the plan… and it looks like a butterfly.

Compact solid-state laser system generates 193-nm vortex beam for the first time

Deep ultraviolet (DUV) lasers, known for their high photon energy and short wavelengths, are essential in various fields such as semiconductor lithography, high-resolution spectroscopy, precision material processing, and quantum technology. These lasers offer increased coherence and reduced power consumption compared to excimer or gas discharge lasers, enabling the development of more compact systems.

As reported in Advanced Photonics Nexus, researchers from the Chinese Academy of Sciences have made a significant advancement by developing a compact, solid-state laser system capable of generating 193-nm coherent light.

This wavelength is crucial for photolithography, a process used to etch intricate patterns onto , forming the backbone of modern electronic devices.

Nanotech Breakthrough Unveils the Hidden Power of Exploding Stars

For the first time, scientists have directly measured the cross-section of a weak r-process nuclear reaction using a radioactive ion beam. Specifically, the team studied the reaction 94Sr(α, n)97Zr, where a radioactive isotope of strontium (strontium-94) absorbs an alpha particle (a helium nucleus), emits a neutron, and becomes zirconium-97.

The findings have been published as an Editors’ Suggestion in Physical Review Letters

<em> Physical Review Letters (PRL)</em> is a prestigious peer-reviewed scientific journal published by the American Physical Society. Launched in 1958, it is renowned for its swift publication of short reports on significant fundamental research in all fields of physics. PRL serves as a venue for researchers to quickly share groundbreaking and innovative findings that can potentially shift or enhance understanding in areas such as particle physics, quantum mechanics, relativity, and condensed matter physics. The journal is highly regarded in the scientific community for its rigorous peer review process and its focus on high-impact papers that often provide foundational insights within the field of physics.

An experimental test of the nonlocal energy alteration between two quantum memories

Quantum technologies operate by leveraging various quantum mechanical effects, including entanglement. Entanglement occurs when two or more particles share correlated states even if they are distant.

When two particles are spin entangled, the (i.e., spin) of one particle can influence that of its entangled partner. This would suggest that the energy of the second particle can be altered via a nonlocal correlation, without enabling faster-than-light communication.

Researchers at Shanghai Jiao Tong University and Hefei National Laboratory recently carried out a study aimed at testing this theoretical prediction experimentally using two .

Graphene quantum dots mimic orbital hybridization

A research team led by Professor Sun Qing-Feng in collaboration with Professor He Lin’s research group from Beijing Normal University has achieved orbital hybridization in graphene-based artificial atoms for the first time.

Their study, titled “Orbital hybridization in graphene-based artificial atoms” has been published in Nature. The work marks a significant milestone in the field of quantum physics and , bridging the gap between artificial and real atomic behaviors.

Quantum dots, often called artificial atoms, can mimic but have not yet been used to simulate orbital hybridization, a crucial process in real atoms. While quantum dots have successfully demonstrated artificial bonding and antibonding states, their ability to replicate orbital hybridization remained unexplored.