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Cake day: June 10th, 2025

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  • Actually 157 out of 192 UN countries recognize the state of Palestine right now. When Crimea was invaded by Russia in 2014 and Israël had already been occupying parts of it illegaly for over 40 years, the count was 133. As soon as 1994, even before Netanyahu’s first tenure, there were more than half (96) UN member states recognizing the state of Palestine.

    Most countries absolutely do and have recognized Palestine and the imperialism that goes on there is old as fuck. Yours maybe doesn’t, mine only switched this year as a mostly performative act. Source: even a passing glance at wikipedia


  • Unfortunately not. Quantum teleportation is an awful name: it’s called that way because it implies “destroying” a quantum state somewhere, and “recreating” it identically somewhere else, effectively transmitting information. However, the process also requires a classical information transfer at some point, and is absolutely not instantaneous . It’s only useful for cryptography because it’s mathematically impossible to listen in on this information being transferred without disturbing it.

    It’s one of the most unfavorable coolness-of-name vs. coolness-of-actual-thing ratio in physics.




  • gbzm@piefed.socialtoPolitical Memes@lemmy.worldLies are comforting.
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    23 days ago

    My sibling in Christ, this is what these words were specifically built to mean.

    The U in Utopia is both the privative “u” and a form of the meliorative “eu”. The word was coined by Thomas More in 1516 to literally to mean “a place that is so perfect it cannot exist”, and the hope was that the fiction would serve as an unattainable model to aim for, to motivate and direct the progress of real-life society Though the word “dystopia” was later coined as an inverse mirror of utopia, it doesn’t use nor does it require a mirrored etymological wordplay: “dys” just means “bad”, basically, no implication of inexistence there. And for good reason: the dystopia is a trope that is used mainly in anticipatory fiction as a warning for where real-life society could be headed, as such it would make no sense for it to be depicted as impossible, on the contrary it must have a ring of truth to be an effective warning.






  • You know maybe I’m starting to understand your point.

    On the surface your question is easy to answer: clock uncertainties are a thing, and are very analogous to space-position uncertainty. Also time-of-arrival is a question that you can pretty much always ask, and it’s precisely the “uncertain t for given x” to the usual “uncertain x for given t”. Conversely you don’t have the standard deviation of “just space”: as universal as it is, Delta x is always incarnated as some well-defined space variable in each setting.

    But it’s also true that clock and time-of-arrival uncertainties are not what’s usually meant in the time-energy relation: in general it’s a mean duration (rather than a standard deviation) linked to a spectral width. And it does make sense, because quantum mechanics are all about probability densities in space propagating in a well-parametrized time. So Fourier on space=>uncertainties while Fourier on time=>actual duration/frequency. And if you go deeper than that, I’m used to thinking of the uncertainty principle in terms of Fourier because of the usual Delta x Delta p > 1/2 formulation, but for the full-blown Heisenberg-y formula you need operators, and you don’t have a generally defined time operator of the standard QM because of Pauli’s argument.

    But that’s a whole thing in and of itself, because now I’m wondering about time of arrival operators, quantum clocks and their observables, and is Pauli’s argument as solid as that since people do be defining time operators now and it’s quite fun, so thanks for that.


  • Whether it’s energy-time or position-momentum, the uncertainty principle is just a consequence of two variables being linked via Fourier transform. So position and wave-vector therefore position and momentum, ans time and pulse and therefore time and energy. Sure, it only has consequences when you’re looking at time uncertainties and probabilistic durations, which is less common than space distributions. And sure it also happens in classical optics, that’s where all of this comes from. And I agree that “quantum fluctuations” is often a weird misleading term to talk about uncertainties. But I’m not sure how you end up with “no link to the uncertainty principle”? It’s literally the same relation between intervals in direct or Fourier space.