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Category: quantum physics – Page 15

Quantum vibronics research points to future energy and computing technologies

Scientists at the University of California, Riverside are making breakthroughs in understanding how quantum wave functions move across ultra-thin materials—research that could eventually improve solar energy technologies and help lay the groundwork for new forms of quantum computing.

The researchers are part of UCR’s Center for Quantum Vibronics in Energy and Time (QuVET), which was established two years ago and focuses on “vibronics,” the interaction between vibrations and electronic quantum states. The center examines both biological molecules and synthetic layered materials, where the same fundamental quantum processes emerge across vastly different systems.

Its research brings together physicists, chemists, engineers, and biochemists from multiple institutions to better understand how vibrations shape quantum behavior.

Cobalt honeycombs open a new path to quantum computing

Honeycombs are famous for their elegant design, but now they may have found a new application: quantum computing. To collect knowledge from subatomic particles, quantum computers require carefully designed materials capable of performing necessary, complex functions. However, the metals used, such as ruthenium and iridium, are often rare and expensive, limiting the potential to build new technology.

In an article recently published in Physical Review Materials, researchers from SANKEN at The University of Osaka and collaborating institutions reported the creation of a special thin-film material in which cobalt atoms formed local honeycomb arrangements embedded inside a larger honeycomb matrix. These cobalt honeycomb motifs exhibit strong magnetic interactions, which are important for quantum computing applications.

Kitaev materials, a class of quantum magnetic materials studied for their potential use in quantum information science, have attracted major attention because they may host exotic quantum states known as spin liquids.

Quantum pendulum clock overcomes classical accuracy limits and sheds light on quantum to classical transitions

In a grandfather clock, a pendulum swings back and forth and this periodic motion is maintained using the energy stored in its suspended weights. This is done with the help of the escapement mechanism, which converts the gravitational energy of the weights into impulses that drive the pendulum, which then moves the clock’s gears, which move its hands.

A group of researchers recently designed a quantum version of the pendulum clock. According to their new study, published in Physical Review A, this quantum pendulum clock can operate autonomously and is more accurate than previous quantum clocks.

Quantum entanglement provides a new framework for understanding chemical bonding

Chemical bonding is one of the central organizing principles of the microscopic world. It determines how atoms combine and thereby governs a wide range of physical and chemical properties of quantum systems across many length scales, ranging from small molecules and biomolecules to macroscopically large solid materials.

Yet, despite its fundamental importance and its prominent role already in high school science education, chemical bonds remain surprisingly elusive from the perspective of quantum mechanics. They are indispensable for describing matter, even though they are not directly observable quantities.

In a recent article published in Nature Communications, the group led by LMU physicist Christian Schilling and member of the MCQST Cluster of Excellence, addresses this long-standing challenge using concepts from quantum information theory.

The generation of massive Schrödinger cat states using ultracold atoms

Quantum mechanics is a physics framework that describes how matter and energy behave at an extremely small scale, specifically at the scale of atoms and subatomic particles. An effect predicted by the laws of quantum mechanics is superposition, which entails that particles can exist in multiple states or positions simultaneously, which remain indefinite until they are measured or observed.

A well-known example of a quantum state in which a system behaves as if it is in two contrasting states at once is the so-called Schrödinger cat state. This state is rooted in a paradox introduced by physicist Erwin Schrödinger, who proposed that if a cat is placed inside a sealed box with a device that has a 50% chance of killing it, the cat is simultaneously alive and dead until someone opens the box and looks inside it.

Researchers at Southern University of Science and Technology and the Quantum Science Center of Guangdong–Hong Kong–Macao Greater Bay Area recently demonstrated the experimental generation of massive Schrödinger cat states using ultracold atoms—atoms cooled down to temperatures near to absolute zero.

Electrical ‘knob’ can switch light on, off and tune intensity at the nanoscale

Physicists from Emory University have led work to develop a microscopic, nonlinear light source that can be switched on, off or tuned to a particular intensity by an electrical “knob.” The paper is published in the journal Optica, and could aid in the design of smaller, more flexible technologies for communications, sensing and quantum computing.

The new method focuses on a type of nonlinear optics known as second harmonic generation (SHG), where two photons of the same frequency interact with a material and combine into a single photon with twice the frequency.

“Nobody had previously shown that you can tune second harmonic generation with an electric knob in such a small device,” says Hayk Harutyunyan, senior author of the paper and Emory professor of physics.

Time Itself Seems to Have a Limit of Precision Due to a Quantum Physics Model

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Hello and welcome! My name is Anton and in this video, we will talk about a proposition that time precision has a major limit.
Links:
https://journals.aps.org/prresearch/p…
Other videos: • Atomic Clock Breakthrough Could Lead To Qu…
• Most Accurate Time Keeping Device in the W…
#quantumphysics #time #science.

0:00 Limits of time measurement.
0:45 Quantum mechanics and why some things happen certain ways.
2:38 Spontaneous collapse model explained.
5:00 Gravity doesn’t like quantum stuff.
7:10 New study — effects on time measurement.
8:50 How accurate then?
10:25 Implications.
11:30 Can this be proven?
12:30 Conclusions.

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Light-Matter Particles Could Change AI Forever

Artificial intelligence is advancing rapidly, but today’s computers are reaching their physical and energy limits. Now, scientists are exploring a revolutionary solution: light-matter particles known as polaritons. These exotic hybrid particles combine the properties of light and matter, allowing information to move at incredible speeds while consuming far less energy than traditional electronic chips.

In this video, we explore how light-based computing could transform the future of AI, why researchers believe polariton technology may outperform conventional processors, and what this breakthrough could mean for machine learning, robotics, quantum technologies, and the future of computing itself.

Could this be the next major leap beyond silicon chips? And are we entering an era where AI operates at near light speed?

Watch to discover the science behind one of the most exciting technological breakthroughs of the decade.

#AI, #ArtificialIntelligence, #QuantumComputing, #FutureTechnology, #Physics, #MachineLearning, #Science, #Technology, #Innovation, #NeuralNetworks, #DeepLearning, #QuantumPhysics, #TechNews, #Computing, #LightMatterParticles

Quantum tunnelling

In physics, quantum tunnel ling, barrier penetration, or simply tunnel ling is a quantum mechanical phenomenon in which an object such as an electron or atom passes through a potential energy barrier that, according to classical mechanics, should not be passable due to the object not having sufficient energy to pass or surmount the barrier.

Tunnelling is a consequence of the wave nature of matter and quantum indeterminacy. The quantum wave function describes the states of a particle or other physical system and wave equations such as the Schrödinger equation describe their evolution. In a system with a short, narrow potential barrier, a small part of wavefunction can appear outside of the barrier representing a probability for tunnel ling through the barrier.

Since the probability of transmission of a wave packet through a barrier decreases exponentially with the barrier height, the barrier width, and the tunnel ling particle’s mass, tunnel ling is seen most prominently in low-mass particles such as electrons tunnel ling through atomically narrow barriers. However tunnel ling has been observed with protons and even atoms and tunnel ling has been used to explain physical effects with particles this large.

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