quantum mechanics

Researchers control quantum states with spin-polarized currents

by

Researchers at ETH Zurich have achieved a significant breakthrough in quantum physics by demonstrating that quantum states of single electron spins can be controlled using spin-polarized electron currents. This pioneering method holds potential for future applications in electronic circuit elements, potentially revolutionizing data storage and processing. The Spin of Electrons Electrons possess an intrinsic angular … Read more

Entangled photons break rotation sensitivity records

by

A team of researchers led by Philip Walther at the University of Vienna carried out a pioneering experiment where they measured the effect of the rotation of Earth on quantum entangled photons. The work, published in Science Advances, represents a significant achievement that pushes the boundaries of rotation sensitivity in entanglement-based sensors, potentially setting the … Read more

Physicists achieve breakthrough in quantum entanglement with top quarks

by

A team of physicists led by University of Rochester professor Regina Demina has made a groundbreaking discovery in the realm of quantum entanglement, an enigmatic phenomenon famously referred to by Albert Einstein as “spooky action at a distance.” Quantum entanglement involves the interlinked behavior of tiny particles that, once having interacted, can influence each other … Read more

Cosmology: Studying the Origin and Evolution of the Universe

by

Cosmology is the scientific study of the large-scale properties of the universe as a whole. It aims to understand the origin, evolution, structure, and eventual fate of the universe. By examining cosmic phenomena such as the Big Bang, cosmic microwave background radiation, dark matter, and dark energy, cosmologists develop theories and models that explain how … Read more

Theory of Everything

by

The quest for a Theory of Everything (TOE) is one of the most ambitious scientific endeavors, aiming to unify all fundamental forces and particles in a single, all-encompassing theoretical framework. This grand vision seeks to bridge the gap between the two main pillars of modern physics: General Relativity, which describes the macroscopic world of gravity … Read more

Scientists simulate a hallmark of quantum gravity

by

In a groundbreaking development at the intersection of quantum mechanics and general relativity, researchers have made significant strides toward unraveling the mysteries of quantum gravity. This work sheds new light on future experiments that hold promise for resolving one of the most fundamental enigmas in modern physics: the reconciliation of Einstein’s theory of gravity with … Read more

Discovery of PrMgAl11O19 single crystals advances spin liquid research

by

A spin liquid is a fascinating state of matter that occurs in certain magnetic materials at very low temperatures. Unlike conventional magnetic states where electron spins align in a regular pattern, spin liquids exhibit a disordered state due to the peculiarities of quantum mechanics. This state of matter does not resemble everyday liquids but is … Read more

Engineers develop world-record microwave squeezer for dark matter detection

by

UNSW quantum engineers have developed a new amplifier that could help other scientists search for elusive dark matter particles. Imagine throwing a ball. You’d expect science to be able to work out its exact speed and location at any given moment, right? Well, the theory of quantum mechanics says you can’t actually know both with … Read more

Entangled two-photon absorption unveils unique molecular properties

by

Spectroscopy is the study of how matter absorbs and emits light and other radiation. It allows scientists to study the structure of atoms and molecules, including the energy levels of their electrons. Classical optical spectroscopy relies on the way particles of light called photons interact with matter. These classical spectroscopy techniques include one-photon absorption (OPA) … Read more

Miniaturized quantum light detector paves way for scalable quantum technologies

by

Researchers at the University of Bristol have made an important breakthrough in scaling quantum technology by integrating the world’s tiniest quantum light detector onto a silicon chip. The paper, “A Bi-CMOS electronic photonic integrated circuit quantum light detector,” was published in Science Advances. A critical moment in unlocking the information age was when scientists and engineers … Read more

New study proposes method for discovering tauonium, the heaviest purely electromagnetic atom

by

The hydrogen atom was once considered the simplest atom in nature, composed of a structureless electron and a structured proton. However, as research progressed, scientists discovered a simpler type of atom, consisting of structureless electrons, muons, or tauons and their equally structureless antiparticles. These atoms are bound together solely by electromagnetic interactions, with simpler structures … Read more

Physicists achieve ultra-precise atomic positioning for quantum simulators

by

In the realm of quantum mechanics, proximity reigns supreme. The closer atoms are, the stronger their interactions become. This characteristic is crucial for various quantum phenomena, making it essential for scientists to arrange atoms in close proximity when designing quantum simulators. These simulators allow researchers to explore exotic states of matter and design novel quantum … Read more

Researchers develop tunable nonreciprocal device for quantum computers

by

Scientists led by the University of Massachusetts Amherst have adapted a device called a microwave circulator for use in quantum computers, allowing them for the first time to precisely tune the exact degree of nonreciprocity between a qubit, the fundamental unit of quantum computing, and a microwave-resonant cavity. The ability to precisely tune the degree … Read more

Study proposes entanglement-free experiment to test quantum nature of gravity

by

Gravity is a force that permeates our everyday lives, yet its true nature remains shrouded in mystery. Scientists grapple with the question of whether gravity’s essence aligns with Einstein’s geometric vision or adheres to the principles of quantum mechanics. This dilemma forms the backdrop of a new study published in Physical Review X, where researchers … Read more

Researchers discover new entropy rule for quantum entanglement transformations

by

Bartosz Regula, from the RIKEN Center for Quantum Computing, and Ludovico Lami, from the University of Amsterdam, have unveiled a groundbreaking discovery regarding the elusive nature of quantum entanglement. Their findings, rooted in probabilistic calculations, shed light on a long-hypothesized rule of entropy governing quantum entanglement, a phenomenon central to the potential power of future … Read more

Chemist discovers catalyst’s assisting role in benzotriazole conversion

by

In most industrial chemical reactions, catalysts combine with the starting materials and accompany them through intermediate stages to the product. In chemistry, this pathway is known as the reaction mechanism, and it is a kind of black box: nobody knows what is happening at the molecular level at first. If the reaction result in the … Read more

Physicists unify description of non-perturbative quantum phenomena with “resurgence” framework

by

In the quantum world, processes can be separated into two distinct classes. One class, that of the so-called “perturbative” phenomena, is relatively easy to detect, both in an experiment and in a mathematical computation. Examples are plentiful: the light that atoms emit, the energy that solar cells produce, the states of qubits in a quantum … Read more

Efficient generation and control of entanglement in superconducting qubit arrays demonstrated

by

Entanglement is a fascinating phenomenon in the realm of quantum physics, where particles at the atomic level exhibit correlations that defy classical explanations. This unique aspect of quantum mechanics plays a pivotal role in understanding the behavior of quantum systems, particularly in the context of quantum computing. Quantum entanglement refers to the intricate correlation between … Read more

Researchers develop world’s first quantum-gas microscope for strontium atoms

by

Quantum physics requires high-precision sensing techniques to delve deeper into the microscopic properties of materials. From the analog quantum processors that have emerged recently, quantum-gas microscopes have proven to be powerful tools for understanding quantum systems at the atomic level. These devices produce images of quantum gases with very high resolution: They allow individual atoms … Read more

Quantum Mechanics: Mysteries of the Subatomic World

by

Quantum mechanics is one of the most profound and revolutionary theories in modern physics, unraveling the mysteries of the subatomic world and fundamentally transforming our understanding of matter, energy, and the fundamental forces of nature. Developed in the early 20th century through the works of pioneering physicists such as Max Planck, Albert Einstein, Niels Bohr, … Read more