Archive for the ‘quantum physics’ category: Page 15
Oct 6, 2024
Astronomers Find Cosmic Filaments Rotate Across Hundreds of Millions of Light-Years
Posted by Shubham Ghosh Roy in categories: computing, cosmology, neuroscience, quantum physics
Scientists have discovered that cosmic filaments, the largest known structures in the universe, are rotating. These massive, twisting filaments of dark matter and galaxies stretch across hundreds of millions of light-years and play a crucial role in channeling matter to galaxy clusters. The finding challenges existing theories, as it was previously believed that rotation could not occur on such large scales. The research was confirmed through both computer simulations and real-world data, and it opens up new questions about how these giant structures acquire their spin.
After reading the article, a Reddit user named Kane gained more than 100 upvotes with this comment: “What if galaxy clusters are like neuron and glial clusters in a brain. And dark matter is basically the equivalent of a synapse. It connects galaxies and matter together and is responsible for sending quantum information back and forth like a signal chain.”
Oct 6, 2024
Quantum Paradox: Does Reality Depend on Who Observes It?
Posted by Shubham Ghosh Roy in category: quantum physics
Discover how quantum mechanics challenges the nature of reality in this engaging exploration. Learn how observation impacts reality and unravel the my.
Oct 6, 2024
A smooth exit from eternal inflation?
Posted by Quinn Sena in categories: cosmology, quantum physics
I think Stephen hawking was right about the Einstein physics of our universe but at the quantum mechanical realm it breaks all the rules with infinite energy.
The usual theory of inflation breaks down in eternal inflation. We derive a dual description of eternal inflation in terms of a deformed Euclidean CFT located at the threshold of eternal inflation. The partition function gives the amplitude of different geometries of the threshold surface in the no-boundary state. Its local and global behavior in dual toy models shows that the amplitude is low for surfaces which are not nearly conformal to the round three-sphere and essentially zero for surfaces with negative curvature. Based on this we conjecture that the exit from eternal inflation does not produce an infinite fractal-like multiverse, but is finite and reasonably smooth.
Oct 6, 2024
IonQ Demonstrates Remote Ion-Ion Entanglement
Posted by Genevieve Klien in category: quantum physics
IonQ has demonstrated remote ion-ion entanglement, a key milestone towards quantum networking and scaling its quantum systems.
Oct 5, 2024
Hosting the Universe in a Quantum Computer: Scientists Simulate Cosmological Particle Creation
Posted by Paul Battista in categories: computing, mathematics, particle physics, quantum physics
The foundation of this simulation, as described by the team, is a well-known cosmological model that describes the universe as expanding uniformly over time. The researchers modeled how a quantum field, initially in a vacuum state (meaning no particles are present), responds to this expansion. As spacetime stretches, the field’s oscillations mix in a process that can create particles where none previously existed. This phenomenon is captured by a transformation that relates the field’s behavior before and after the universe expands, showing how vibrations at different momenta become entangled, leading to particle creation.
To understand how many particles are generated, the researchers used a mathematical tool called the Bogoliubov transformation. This approach describes how the field’s vacuum state evolves into a state where particles can be detected. As the expansion rate increases, more particles are produced, aligning with predictions from quantum field theory. By running this simulation on IBM quantum computers, the team was able to estimate the number of particles created and observe how the quantum field behaves during the universe’s expansion, offering a new way to explore complex cosmological phenomena.
According to the team, the most notable result of the study was the ability to estimate the number of particles created as a function of the expansion rate of the universe. By running their quantum circuit on both simulators and IBM’s 127-qubit Eagle quantum processor, the researchers demonstrated that they could successfully simulate particle creation in a cosmological context. While the results were noisy—particularly for low expansion rates—the error mitigation techniques used helped bring the outcomes closer to theoretical predictions.
Oct 5, 2024
Direct measurement of a subtle current phase relation shows potential for more stable superconducting qubits
Posted by Saúl Morales Rodriguéz in categories: computing, quantum physics
In recent years, quantum physicists and engineers have made significant strides toward the development of highly performing quantum computing systems. Realizing a quantum advantage over classical computing systems and enabling the stable operation of quantum devices, however, will require the development of new building blocks for these devices and other aspects underlying their correct functioning.
Oct 5, 2024
Quantum communication: Using microwaves to efficiently control diamond qubits
Posted by Saúl Morales Rodriguéz in categories: computing, quantum physics
In a first for Germany, researchers at the Karlsruhe Institute of Technology (KIT) have shown how tin vacancies in diamonds can be precisely controlled using microwaves. These vacancies have special optical and magnetic properties and can be used as qubits, the smallest computational units for quantum computing and quantum communication. The results are an important step for the development of high-performance quantum computers and secure quantum communications networks.
Oct 5, 2024
Chinese Scientists Unveil the World’s Most Powerful Sound Laser
Posted by Saúl Morales Rodriguéz in categories: biotech/medical, computing, quantum physics
Recent advancements in phonon laser technology, which utilizes sound waves rather than light, show promising new applications in medical imaging and deep-sea exploration.
A novel technique enhances these lasers by stabilizing and strengthening the sound waves, allowing for more precise and powerful outputs. This development not only improves existing uses in medical and underwater applications but also extends potential uses to material science and quantum computing.
Enhancing Phonon Laser Technology
Oct 5, 2024
Revolutionizing Data Storage: Quantum Defects Unlock Ultra-High-Density Optical Memory
Posted by Saúl Morales Rodriguéz in categories: computing, quantum physics
Researchers have developed a promising new optical memory technology using rare earth elements and quantum defects to enable denser and more efficient data storage.
This innovative approach utilizes wavelength multiplexing to increase bit density beyond traditional methods like CDs and DVDs, with theoretical models supporting the potential of near-field energy transfer for long-lasting data retention.
Introduction to Optical Memory Evolution.