News Feature Channel: Quantum Mechanics

Scientists Merge Two "Impossible" Materials Into New Artificial Structure

Rutgers University-New Brunswick — Tue, 01 Apr 2025 09:35:32 EST

An international team led by Rutgers University-New Brunswick researchers has merged two lab-synthesized materials into a synthetic quantum structure once thought impossible to exist and produced an exotic structure expected to provide insights that could lead to new materials at the core of quantum computing. The work, described in a cover story in the journal Nano Letters, explains how four years of continuous experimentation led to a novel method to design and build a unique, tiny sandwich composed of distinct atomic layers.

Universal Conservation Laws of the Wave-Particle-Entanglement Triad

Chinese Academy of Sciences — Thu, 27 Mar 2025 17:25:58 EST

Wave-particle duality and entanglement are cornerstone concepts in quantum physics, yet their exact relationship has long remained a mystery. Researchers from China and Singapore have forged a theoretical framework that unifies wave-particle behaviours with entanglement. By introducing conservation laws that bridge these quantum phenomena, they unveiled deep connections between them. These predictions were experimentally verified using silicon-integrated nanophotonic quantum chips, offering transformative insights into the fundamental principles of quantum mechanics.

Scientists Discovered Evidence for a New Four-Body Quasi-Particle in 2D Semiconductors

Chinese Academy of Sciences — Thu, 27 Mar 2025 10:35:41 EST

Quasi-particles are collective quantum elements of condensed matter. They are foundationally important for understanding physics of materials and for technological applications of semiconductors. Using ultrafast optical pump-probe technique, scientists discovered a series of new spectral features that are not attributable to existing quasi-particles. By using advanced quantum many-body theories, these spectral features could be uniquely explained by the existence of a new quasi-particle called quadruplon, a genuine four-body composite particle, different from the known bi-exciton.

Chip-Integrated Quantum Digital Signature Network Achieves High-Rate Performance

Chinese Academy of Sciences — Thu, 27 Mar 2025 06:20:06 EST

Quantum digital signatures (QDS) offer an information-theoretically secure solution for ensuring data integrity, authenticity, and non-repudiation.

Quantum Leap: NIST Selects FAU for New Generation of Encryption Standards

Florida Atlantic University — Wed, 26 Mar 2025 08:30:18 EST

The National Institute of Standards and Technology (NIST) has selected FAU's Hamming Quasi-Cyclic (HQC) algorithm for standardization in its Post-Quantum Cryptography project. HQC was chosen for its security, efficiency and practical implementation in secure key exchange, which protects digital communications and ensures safe encryption against future quantum computing threats. FAU is the only U.S. university involved among all the authors of the two, winning key-encapsulation mechanism schemes selected by NIST, highlighting its prominent role in the field of post-quantum cryptography.

Researchers Test New Type of Quantum Computing Protocol Using Qudits, Not Qubits.

Perimeter Institute for Theoretical Physics — Tue, 25 Mar 2025 17:25:04 EST

Higher dimension 'qudits' may offer advantages over qubits in quantum computing, according to new research published in Nature Physics.

Breakthrough in Quantum Sensing Could Revolutionise High-Precision Measurement Technologies

University of Portsmouth — Thu, 20 Mar 2025 17:35:01 EST

Breakthrough in quantum sensing could revolutionise high-precision measurement technologies

Nuclear Physicists Create Scalable Quantum Circuits to Simulate Fundamental Physics

Department of Energy, Office of Science — Fri, 14 Mar 2025 21:05:50 EST

Simulations of equations from the Standard Model of particle physics are too difficult for classical supercomputers. In this research, scientists for the first time created scalable quantum circuits to prepare a simulation of the starting state for a particle accelerator collision to test aspects of strong interactions. The researchers first determined these circuits for small systems using classical computers, then scaled the quantum circuits to a large system on more than 100 qubits of IBM's quantum computers.

Quantum Spin Model Made From Nanographene Molecules

Empa, Swiss Federal Laboratories for Materials Science and Technology — Fri, 14 Mar 2025 09:00:20 EST

Empa researchers from the nanotech@surfaces laboratory have experimentally recreated another fundamental theoretical model from quantum physics, which goes back to the Nobel Prize laureate Werner Heisenberg. The basis for the successful experiment was a kind of "quantum Lego" made of tiny carbon molecules known as nanographenes.

'Nanodot' Control Could Fine-Tune Light for Sharper Displays, Quantum Computing

Penn State Materials Research Institute — Thu, 13 Mar 2025 21:05:37 EST

Newly achieved precise control over light emitted from incredibly tiny sources, a few nanometers in size, embedded in two-dimensional (2D) materials could lead to remarkably high-resolution monitors and advances in ultra-fast quantum computing, according to an international team led by researchers at Penn State and Universite Paris-Saclay.

Topological Beaming of Light: A New Approach to Precision Beam Shaping

Chinese Academy of Sciences — Thu, 13 Mar 2025 09:05:56 EST

A novel approach to optical beam shaping based on topological physics effect experimentally demonstrated for the first time. By fabricating thin-film dielectric structures with precisely engineered properties, this new technique allows systematic control over beam profiles as opposed to conventional approaches involving tedious numerical optimization procedures.

KRISS Develops Energy Filter Technology to Stabilize Single-Electron Qubits

National Research Council of Science and Technology — Thu, 13 Mar 2025 00:00:34 EST

The Korea Research Institute of Standards and Science (KRISS, President: Dr. Lee Ho Seong) has developed a technology that controls the energy of single electrons in the desired form.

Scientists Take an Important Step Toward Mitigating Errors in Analog Quantum Simulations of Many-Body Problems

Department of Energy, Office of Science — Tue, 11 Mar 2025 09:10:40 EST

Simulations of quantum many-body problems are a challenge for even the most powerful conventional computers. Quantum computing has the potential to solve this challenge using an approach called an analog quantum simulation. To succeed, these simulations need theoretical approximations of how quantum computers represent many-body systems. In this research, nuclear physicists developed a new framework to analyze these approximations and minimize their effects.

New Empa Laboratory to Unlock the Quantum Potential of Carbon

Empa, Swiss Federal Laboratories for Materials Science and Technology — Thu, 06 Mar 2025 06:50:33 EST

At the end of January, Empa opened a new laboratory that aims to harness quantum effects from carbon. This could pave the way for sustainable quantum technologies, including quantum computers. The project is supported by the Werner Siemens Foundation.

Single-Qubit Sensing Puts New Spin on Quantum Materials Discovery

Oak Ridge National Laboratory — Wed, 05 Mar 2025 07:00:06 EST

Working at nanoscale dimensions, billionths of a meter in size, a team of scientists led by the Department of Energy's Oak Ridge National Laboratory revealed a new way to measure high-speed fluctuations in magnetic materials.

QSA Quantum Technologies Advance Insights into Materials Physics

Lawrence Berkeley National Laboratory — Mon, 03 Mar 2025 20:05:10 EST

QSA plays a critical role in supporting the missions of the DOE's Advanced Scientific Computing Research (ASCR) program.

New Measurement Technique Sheds Light on Bonding Properties of Actinides

Karlsruhe Institute of Technology (KIT) — Fri, 28 Feb 2025 07:30:05 EST

An international team of researchers at the Karlsruhe Institute of Technology (KIT) has developed a new method for analyzing actinides. The method provides unique insights into the electronic structures and bonding properties of these heavy, radioactive elements in the bottom row of the periodic table.

Quantum Career Fair Celebrates 100 years of Quantum Mechanics

Brookhaven National Laboratory — Tue, 25 Feb 2025 09:15:33 EST

The U.S. Department of Energy's (DOE) National Quantum Information Science (QIS) Research Centers hosted the fourth annual QIS Career Fair on Jan. 22, 2025. The virtual event, led by the Co-design Center for Quantum Advantage (C2QA), a National QIS Research Center led by DOE's Brookhaven National Laboratory, kicked off the centers' celebration of the International Year of Quantum Science and Technology (IYQ).

Illuminating the Proton's Inner Workings

University of Adelaide — Thu, 20 Feb 2025 21:50:18 EST

Scientists have now mapped the forces acting inside a proton, showing in unprecedented detail how quarks--the tiny particles within--respond when hit by high-energy photons. The international team includes experts from the University of Adelaide who are exploring the structure of sub-atomic matter to try and provide further insight into the forces that underpin the natural world.

What Is Quantum Coherence?

Argonne National Laboratory — Wed, 19 Feb 2025 19:40:49 EST

What is of quantum coherence and how it is used for quantum sensing and quantum computing applications?