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3 days ago · A system with two quantum copies is exponentially more powerful than one with a single copy. Chanelle Nibbelink for Quanta Magazine. It’s not easy to study quantum systems — collections of particles that follow the counterintuitive rules of quantum mechanics. Heisenberg’s uncertainty principle, a cornerstone of quantum theory, says it’s ...
4 days ago · Physics Quantum theory is challenging long-standing ideas about entropy. A mathematical study finds that three definitions of what it means for entropy to increase, which have previously been ...
5 days ago · Prof. Goold said: “We are experts in the interface between non-equilibrium thermodynamics and quantum theory and, as such, we have the right toolbox to tackle these questions. Our work essentially provides a recipe to generate the Mpemba effect in quantum systems, where a physical transformation that effectively ‘heats’ the quantum system can be performed.
3 days ago · That is perhaps why the free-energy principle (FEP) has garnered so much attention. What began in the early 2000s as a tool to explain cognitive processes like perception and action began to be ...
3 days ago · Bell's theorem is a term encompassing a number of closely related results in physics, all of which determine that quantum mechanics is incompatible with local hidden-variable theories, given some basic assumptions about the nature of measurement. "Local" here refers to the principle of locality, the idea that a particle can only be influenced ...
4 days ago · The resulting quantum field theory is known as quantum electrodynamics, or QED. QED accounts for the behaviour and interactions of electrons, positrons, and photons. It deals with processes involving the creation of material particles from electromagnetic energy and with the converse processes in which a material particle and its antiparticle annihilate each other and produce energy.
2 days ago · The double-slit experiment is an experiment in quantum mechanics and optics demonstrating the wave-particle duality of electrons, photons, and other fundamental objects in physics. When streams of particles such as electrons or photons pass through two narrow adjacent slits to hit a detector screen on the other side, they don't form clusters based on whether they passed through one slit ...
