2024 Ta-You Wu Lecture - Constraints on Quantum Gravity - Hirosi Ooguri

Поділитися
Вставка
  • Опубліковано 25 лис 2024

КОМЕНТАРІ • 5

  • @LaboriousCretin
    @LaboriousCretin 18 днів тому

    19:46 multiple viable routes. Deposit from sheets colliding and quantum distribution off ring. Or primordial degenerate matter ( plankian ) and using gravitation to destroy a 12.5 light year diamiter black hole mass, and a couple others. At least 1 version you know with scalar spike beyond quantum foam constraints or foliation from string pop. Though variants miss key things like, natural cutoffs for the universe and using infinites for finite systems. Probability and predictability and particle production from quantum foam and gravitational waves in a energy density regime.
    Still a good talk. Thank you for sharing the video. Keep up the good work.

  • @arnoldkotlyarevsky383
    @arnoldkotlyarevsky383 21 день тому

    I have to say, it really undermines the credibility of the theory when its most prestigious exponents fly into a defense of the theory, claiming it to be the only game in town, after being politely asked to outline the constraints on the dimensionality of the theory...in a talk about the constraints imposed on theories of quantum gravity.
    This whole enterprise is interesting but if you cannot explain why we haven't seen evidence of supersymmetry, or why the previous predictions about finding supersymmetric particles were wrong, if you cannot account for the "wrong" number of dimensions, and crucially, if you cannot begin to address the legitimacy of ADS-CFT when we do not live in an anti De Sitter space (nor do we live in a (N-1)+1D, gravityless, boundary on a N+1D space), then this all begins to feel a bit like an exercise in conspiracy theory.

  • @yojihagiya8183
    @yojihagiya8183 21 день тому

    Einstein's theory of relativity explains that gravity is due to a distortion of space-time, but it does not explain why space-time is distorted.
    Hawking seems to have said that the particles that generate gravity are gravitons, but they have not been found yet.
    I believe that gravity is the Coulomb force between two uncharged objects.
    In other words, the particles that generate gravity are electrons and protons.
    I think of neutrons as a pair of electrons and protons.
    Let us consider the sun and the earth.
    The electrons in the sun and the electrons in the earth repel each other.
    The electrons in the sun and the protons in the earth attract each other.
    The protons in the sun and the electrons in the earth attract each other.
    Protons in the sun and protons in the earth repel each other.
    The above four forces added together is the gravitational force between the Sun and the Earth.
    The forces of attraction and repulsion between objects are almost the same, but the force of attraction is slightly stronger.
    The reason is that the Coulomb attraction and repulsion are not the same.
    You may be wondering why I say that.
    Actually, a Scottish physicist by the name of John Robison has made such a measurement.
    According to his measurements, the force of attraction is inversely proportional to the square of the distance, while the force of repulsion is inversely proportional to the 2.06 power of the distance.
    In other words, the result was that the force of attraction was stronger than the force of repulsion.
    If this is true, then it would seem natural that gravity would only generate an attractive force.
    However, the above measurement is quite old, so its accuracy is questionable.
    The question is whether repulsion really does not obey the inverse square law, or whether John Robison was mistaken and in fact it does obey the inverse square law but the repulsion is simply weaker than the attraction.
    If it does not obey the inverse square law, then the physics needs to be reworked.
    If the repulsion is simply weaker, then we can simply multiply the Coulomb constant for the repulsion by a value slightly smaller than the Coulomb constant for the attraction.

  • @mondipa6556
    @mondipa6556 21 день тому +1

    Invent a device that integrated into the human body that stops unnecessary thoughts from entering the mind while engaging in productive activities such as studying, job interview,cooking,buisness, learning to ride scooters, scooty.Even if we intentionally try to think about unnecessary thoughts, this device stops those thoughts from arising and doesn't allow unnecessary thoughts to enter the mind but notice that this device has no negative side effects and make a rule all over the world that this device are free for everyone.