The development of a quantum computer that can solve problems, which classical computers can only solve with great effort or not at all—this is the goal currently being pursued by an ever-growing number of research teams worldwide. The reason: Quantum effects, which originate from the world of the smallest particles and structures, enable many new technological applications. So-called superconductors, which allow…
Tag: quantum mechanics
Heisenberg limit gets a meaningful update
One of the cornerstones of quantum theory is a fundamental limit to the precision with which we can know certain pairs of physical quantities, such as position and momentum. For quantum theoretical treatments, this uncertainty principle is couched in terms of the Heisenberg limit, which allows for physical quantities that do not have a corresponding observable in the formulation of quantum…
How supercomputers are helping us link quantum entanglement to cold coffee
Theoretical physicists from Trinity College Dublin have found a deep link between one of the most striking features of quantum mechanics—quantum entanglement—and thermalisation, which is the process in which something comes into thermal equilibrium with its surroundings. …
What is quantum cognition? Physics theory could predict human behavior.
Some scientists think quantum mechanics can help explain human decision-making. Source: https://www.livescience.com/quantum-like-model-of-decision-making-proposed.html
Quantum experiments explore power of light for communications, computing
A team from the Department of Energy’s Oak Ridge National Laboratory has conducted a series of experiments to gain a better understanding of quantum mechanics and pursue advances in quantum networking and quantum computing, which could lead to practical applications in cybersecurity and other areas. …
A neural network as an anchor point
Quantum mechanics is a well-established theory, but at a macroscopic level it leads to intractable contradictions. Now ETH physicists are proposing to resolve the problem with the aid of neural networks. …
Rewriting quantum mechanics in their spare time
As students, Jussi Lindgren and Jukka Liukkonen had found one element of their quantum mechanics lectures unsatisfying. “When we were taught physics, there were some fundamental elements you were told were true, and you had to accept they were true without it being shown why,” said Jussi Lindgren, “and I didn’t really like this”. …
An approach for constructing non-Hermitian topological invariants in real space
In physics, non-Hermitian systems are systems that cannot be described by standard (i.e., Hermitian) laws of quantum mechanics, or more precisely, that can only be described by non-Hermitian Hamiltonians. Non-Hermitian systems are ubiquitous in nature. Many open systems, i.e., systems that are not fully isolated from the rest of the world, belong to this class. The topology of these systems (i.e.,…
New understanding of charge transport reveals an exotic quantum mechanical regime
In work that may have broad implications for the development of new materials for electronics, Caltech scientists for the first time have developed a way to predict how electrons interacting strongly with atomic motions will flow through a complex material. To do so, they relied only on principles from quantum mechanics and developed an accurate new computational method. …
Physicists Have Finally Seen Traces of the Long-Sought ‘Axion’ Particle
fahrbot-bot shares a report from Live Science: Scientists have finally found traces of the axion, an elusive particle that rarely interacts with normal matter. The axion was first predicted over 40 years ago but has never been seen until now. Scientists have suggested that dark matter, the invisible matter that permeates our universe, may be made of axions. But rather than…