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Archive for the ‘quantum physics’ category: Page 12

Jun 16, 2024

“Spooky action at a distance” confirmed in heaviest particles

Posted by in categories: particle physics, quantum physics

Physicists have delved deeper into the enigmatic world of quantum entanglement and top quarks, bringing a new level of understanding to a phenomenon that even Albert Einstein found perplexing.

This incredible feat has the potential to revolutionize our understanding of the quantum realm and its far-reaching implications.

The experiment, conducted by a team of researchers led by University of Rochester physics professor Regina Demina at the European Center for Nuclear Research (CERN), has yielded a significant result.

Jun 14, 2024

Unlocking the Future of Quantum Computing: Insights from Paul Terry, CEO of Photonic Inc.

Posted by in categories: computing, quantum physics

Paul Terry, CEO of Photonic Inc., explores the crucial phases needed to develop large-scale, fault-tolerant quantum systems.

Jun 14, 2024

Physicists confirm quantum entanglement persists between top quarks, the heaviest known fundamental particles

Posted by in categories: particle physics, quantum physics

An experiment by a group of physicists led by University of Rochester physics professor Regina Demina has produced a significant result related to quantum entanglement—an effect that Albert Einstein called “spooky action at a distance.”

Jun 14, 2024

What “naked” singularities are revealing about quantum space-time

Posted by in categories: cosmology, quantum physics

Are points of infinite curvature, where general relativity breaks down, always hidden inside black holes? An audacious attempt to find out is shedding light on the mystery of quantum gravity.

By Thomas Lewton

Jun 14, 2024

Dark matter turns out to be an echo of a parallel Universe

Posted by in categories: cosmology, particle physics, quantum physics

The study is based on several intriguing coincidences. First, observations show that there is about the same amount of ordinary and dark matter, which exceeds baryonic by about five times. And secondly, neutrons and protons have almost the same mass, which allows them to form stable atoms — this is a random but stable property of the quantum world, because otherwise our universe would not be home to any of the atoms that make up stars, planets and ourselves.

In fact, the theory suggests that there may be a parallel universe like ours in which neutrons and protons do not have such convenient symmetry in mass. In this world, there is a “soup” of subatomic particles that interact little, which explains why dark matter does not seem to clump together.

It is important to note that this is just one more of many hypotheses that try to explain the mystery of dark matter – an annoying and lingering unknown in our understanding of the universe.

Jun 14, 2024

Conservative Black Hole Scattering at Fifth Post-Minkowskian and First Self-Force Order

Posted by in categories: cosmology, quantum physics

Quantum field theory techniques are employed to compute the conservative scattering dynamics of a pair of black holes to the fifth order in Newton’s constant.

Jun 14, 2024

Fascinating behavior of “super photons” in the quantum realm

Posted by in categories: particle physics, quantum physics

Have you ever wondered what happens when thousands of particles of light merge into a single entity? This phenomenon, known as a “super photon,” has fascinated physicists for years.

Now, researchers have made an intriguing discovery that broadens our understanding of this exotic quantum state.

Dr. Julian Schmitt and his colleagues from the Institute of Applied Physics at the University of Bonn have shown that photon Bose-Einstein condensates, also known as quantum gases, obey a fundamental theorem of physics.

Jun 13, 2024

A Step toward Quantum Gases of Doubly Polar Molecules

Posted by in category: quantum physics

Researchers created an ultracold gas of molecules with strong magnetic dipoles, which may lead to new types of Bose-Einstein condensates.

Jun 13, 2024

Quantum data assimilation offers new approach to weather prediction

Posted by in categories: mathematics, quantum physics

Data assimilation is a mathematical discipline that integrates observed data and numerical models to improve the interpretation and prediction of dynamical systems. It is a crucial component of Earth sciences, particularly in numerical weather prediction (NWP).

Jun 13, 2024

Tunable entangled photon-pair generation in a liquid crystal

Posted by in categories: engineering, quantum physics

One of the most remarkable features discovered in these experiments is the unprecedented tunability of the two-photon state, achieved by manipulating the LC molecular orientation. By re-orienting the molecules through the application of an electric field, we can dynamically switch the polarization state of the generated photon pairs. This level of control over the photon pairs’ polarization properties is a crucial advancement, offering opportunities for quantum-state engineering in the sources with pixelwise-tunable optical properties, both linear and nonlinear.

Alternatively, we can manipulate the polarization state by implementing a molecular orientation twist along the sample. This approach adds versatility to the design and utilization of LC-based photon-pair sources. Moreover, a strong twist along the sample can markedly increase the efficiency of a macroscopically large source, similar to the periodic poling of bulk crystals and waveguides, but much simpler technologically, as the structure is self-assembled and may be tuned with temperature and electric field39. Owing to their nonlinear coefficient comparable to the best nonlinear crystals, such as lithium niobate, and high damage threshold, FNLCs are perfectly suitable for practical applications. Furthermore, high-quality LC devices such as LC displays are made on an industrial scale, which, combined with our work, opens a path to scalable and cheap production of quantum light sources while exceeding the existing ones in efficiency and functionality.

In the future, the electric-field tuning could be expanded to multi-pixel devices, which have the potential to generate tunable high-dimensional entanglement and multiphoton states. Furthermore, FNLCs can self-assemble in a variety of complex topological structures, which are expected to emit photon pairs in complex, spatially varying beams (structured light), such as vector and vortex beams40. The liquid nature of FNLCs opens a path to their integration with existing optical platforms such as fibres41, waveguides42 and metasurfaces43.

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