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Nethar6
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304 followers
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We'll be shutting down the community in March due to the coming death of g+.
We won't accept any new members till then.
If you want to safe any links make sure you do.
I'll will be safing and resharing them on my MeWe account.

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Nonlinear integrated quantum electro-optic circuits - Physicists envision that the future of quantum computation networks will contain scalable, monolithic circuits, which include advanced functionalities on a single physical substrate. While substantial progress has already been made for a variety of applications on different platforms, the range of diverse photonic states that can be manipulated on demand on a single chip remain limited. This is specifically observed for dynamic time mana...

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Quantum sensors providing magnetic resonance with unprecedented sensitivity - A study by the Quantum Technologies for Information Science (QUTIS) group of the UPV/EHU's Department of Physical Chemistry, has produced a series of protocols for quantum sensors that could allow images to be obtained by means of the nuclear magnetic resonance of single biomolecules using a minimal amount of radiation. The results have been published in Physical Review Letters.

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“I have a question about Quantum fields. If we model particle properties as excitations of various independent fields (Higgs field for mass, EM field for charge etc) then what causes these excitation waves to travel around together? Is there really some kind of particle entity underlying these waves?”

If all we had were empty space with no other constraints on it, it seems like the quantum fields that permeate all of space could take on any values at all. But somehow, that isn’t what we see. We don’t see a continuum of particles with masses, charges, or other properties that have continuous and unconstrained values. Instead, particles come in specific varieties and none other, with explicit values that appear to be quantized and discrete. There’s a reason for this, too, which is underpinned by the mathematical structure of the Standard Model, and can be summed up in two words: boundary conditions.

If you give me the laws of quantum field theory, the structure of the Standard Model, and the fundamental constants, I can give you all the particles. Here’s how it all comes together.

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So watched the first episode of Titans on Netflix and for the most part, I was thinking if this wasn't supposed to be an adaptation of either the comics or the animated Teen Titans show this would make for a pretty decent TV show.
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A wonderful dark Christmas tale
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OPEN ACCESS: Oxygen, temperature and the deep-marine stenothermal cradle of Ediacaran evolution
Link: https://rsj-prod.literatumonline.com/doi/10.1098/rspb.2018.1724
Abstract: Ediacaran fossils document the early evolution of complex megascopic life, contemporaneous with geochemical evidence for widespread marine anoxia. These data suggest early animals experienced frequent hypoxia. Research has thus focused on the concentration of molecular oxygen (O2) required by early animals, while also considering the impacts of climate. One model, the Cold Cradle hypothesis, proposed the Ediacaran biota originated in cold, shallow-water environments owing to increased O2 solubility. First, we demonstrate using principles of gas exchange that temperature does have a critical role in governing the bioavailability of O2—but in cooler water the supply of O2 is actually lower. Second, the fossil record suggests the Ediacara biota initially occur approximately 571 Ma in deep-water facies, before appearing in shelf environments approximately 555 Ma. We propose an ecophysiological underpinning for this pattern. By combining oceanographic data with new respirometry experiments we show that in the shallow mixed layer where seasonal temperatures fluctuate widely, thermal and partial pressure (pO2) effects are highly synergistic. The result is that temperature change away from species-specific optima impairs tolerance to low pO2. We hypothesize that deep and particularly stenothermal (narrow temperature range) environments in the Ediacaran ocean were a physiological refuge from the synergistic effects of temperature and low pO2.
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