Retro Revisited

•March 21, 2019 • Leave a Comment

TimeReversal

<<We all mark days with clocks and calendars, but perhaps no timepiece is more immediate than a mirror. The changes we notice over the years vividly illustrate science’s​ “arrow of time” — the likely progression from order to disorder. We cannot reverse this arrow any more than we can erase all our wrinkles or restore a shattered teacup to its original form.

Or can we?>>

Reversing the flow of time on a quantum computer – Science Daily

Logical Minimalism, for the win

•March 13, 2019 • Leave a Comment

<<A new quantum physics experiment just lent evidence to a mind-boggling idea that was previously limited to the realm of theory, according to the MIT Technology Review] — that under the right conditions, two people can observe the same event, see two different things happen, and both be correct.

According to research shared to the preprint server arXiv on Tuesday, physicists from Heriot-Watt University demonstrated for the first time how two people can experience different realities by recreating a classic quantum physics thought experiment.>>

Quantum Physics Experiment Suggests That Reality Isn’t Objective – Futurism

Breaking the arrow

•December 2, 2017 • Leave a Comment

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“An international team of researchers has conducted an experiment that shows that the arrow of time is a relative concept, not an absolute one. In a paper uploaded to the arXiv server, the team describe their experiment and its outcome, and also explain why their findings do not violate the second law of thermodynamics.

The second law of thermodynamics says that entropy, or disorder, tends to increase over time, which is why everything in the world around us appears to unfold forward in time. But it also explains why hot tea grows cold rather than hot. In this new effort, the researchers found an exception to this rule that works in a way that doesn’t violate the rules of physics as they have been defined.”

Experiment shows that arrow of time is a relative concept, not an absolute one – Phys.org

Going Big

•October 13, 2017 • 2 Comments

entanglement

“Quantum theory predicts that a vast number of atoms can be entangled and intertwined by a very strong quantum relationship, even in a macroscopic structure. Until now, however, experimental evidence has been mostly lacking, although recent advances have shown the entanglement of 2,900 atoms. Scientists at the University of Geneva (UNIGE), Switzerland, recently reengineered their data processing, demonstrating that 16 million atoms were entangled in a one-centimetre crystal. They have published their results in Nature Communications...”

A single photon reveals quantum entanglement of 16 million atoms – Phys.org

Pushing the limit

•September 5, 2017 • Leave a Comment

entanglement

“In a new study, physicists have mathematically proved that any theory that has a classical limit—meaning that it can describe our observations of the classical world by recovering classical theory under certain conditions—must contain entanglement. So despite the fact that entanglement goes against classical intuition, entanglement must be an inevitable feature of not only quantum theory but also any non-classical theory, even those that are yet to be developed.”

Entanglement is an inevitable feature of reality – Phys.org

Fermions – it’s complicated

•August 17, 2017 • Leave a Comment

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“Using transport measurements near the field-tuned quantum critical point of CeRhIn5 at 50 Tesla, the researchers observed a fluctuating nematic-like state. A nematic state is most well known in liquid crystals, wherein the molecules of the liquid are parallel but not arranged in a periodic array. Nematic-like states have been observed in transition metal systems near magnetic and superconducting phase transitions. The occurrence of this property points to nematicity’s correlation with unconventional superconductivity. The difference, however, of the new nematic state found in CeRhIn5 relative to other systems is that it can be easily rotated by the magnetic field direction.”

Superconductivity research reveals potential new state of matter – phys.org

Spontaneous Order

•July 31, 2017 • Leave a Comment

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“The paper strips away the nitty-gritty details of cells and biology and describes a simpler, simulated system of chemicals in which it is nonetheless possible for exceptional structure to spontaneously arise—the phenomenon that England sees as the driving force behind the origin of life. ‘That doesn’t mean you’re guaranteed to acquire that structure,’ England explained. The dynamics of the system are too complicated and nonlinear to predict what will happen.

The simulation involved a soup of 25 chemicals that react with one another in myriad ways. Energy sources in the soup’s environment facilitate or ‘force’ some of these chemical reactions, just as sunlight triggers the production of ozone in the atmosphere and the chemical fuel ATP drives processes in the cell. Starting with random initial chemical concentrations, reaction rates and ‘forcing landscapes’—rules that dictate which reactions get a boost from outside forces and by how much—the simulated chemical reaction network evolves until it reaches its final, steady state, or ‘fixed point.'”

Controversial New Theory Suggests Life Wasn’t a Fluke of Biology: It Was Physics – Wired.com