Recent Blogs Posts

  1. Dark Energy might falsify String Theory

    by , 08-10-2018 at 02:06 AM
    Quote Originally Posted by not_Fritz_Argelander View Post
    OK I've gone ahead and collected some reading material. The paper at the heart of these interesting claims is at

    https://arxiv.org/abs/1806.08362

    It has been notoriously difficult to construct a meta-stable de Sitter (dS) vacuum in string theory in a controlled approximation. This suggests the possibility that meta-stable dS belongs to the swampland. In this paper, we propose a swampland criterion in the form of |∇V|≥ c⋅V for a scalar potential V of
    ...
  2. Dark Energy might falsify String Theory

    by , 08-10-2018 at 02:05 AM
    Quote Originally Posted by not_Fritz_Argelander View Post
    OK... some initial reaction.

    There is this analogy that so far has led to the only positive results for string theory: the Anti de Sitter - Conformal Field Theory correspondence. It looked like a promising way forward for quantum gravity and helps to make sense of experiments at the Relativistic Heavy Ion Collider.

    https://en.wikipedia.org/wiki/AdS/CFT_correspondence

    But it always stuck a little bit. The is it possible to make this correspondence for
    ...
  3. Dark Energy might falsify String Theory

    by , 08-10-2018 at 02:04 AM
    Quote Originally Posted by not_Fritz_Argelander View Post
    https://www.quantamagazine.org/dark-...eory-20180809/

    I don't have an opinion yet. May need some digging.
  4. older interesting approach to mass, length scale, hierarchy problem, Higgs

    by , 07-27-2018 at 11:33 AM
    Quote Originally Posted by not_Fritz_Argelander View Post
    I don't recall posting this before. If I did, beg pardon. It's a radically different idea than the Standard Model with Higgs and reinterprets the Higgs in an interesting way that gets rid of the temptation to multiverse.

    https://www.quantamagazine.org/to-av...ales-20140818/
  5. A pulsar (B1957+20) right side a brown dwarf? How is that possible?

    by , 07-25-2018 at 03:20 AM
    Quote Originally Posted by not_Fritz_Argelander View Post
    OK. I zeroed in on the tidal capture elements of this work. Ha!

    The tidal capture criterion that's used is from the 1975 work of Fabian, Pringles, and Rees. This is the work that Press and Teukolsky improved upon!

    Tidal capture formation of binary systems and X-ray sources in globular clusters

    It is proposed that X-ray sources associated with globular star clusters may be very close binary systems resulting from tidally dissipative two-body encounters
    ...
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