1,892 reputation
618
bio website member.ipmu.jp/yuji.tachikawa
location
age
visits member for 3 years, 9 months
seen Sep 30 at 6:52

As an occupation, I'm a mathematical physicist, studying string theory and quantum field theory.

I've developed as a hobby a few Cocoa (Touch) apps. The largest one so far is spires.app, which manages articles and metadata downloaded from the arXiv eprint server, the inspire database, and the journal websites.

I'm also interested in many other things, which is why I ask questions in various StackExchange sites ...


Oct
6
comment Uniqueness of supersymmetric heterotic string theory
Ah, thank you. Could you edit your answer accordingly (sorry for my mistake in my original question)? I'll accept yours immediately.
Oct
6
comment Other processes than formal power series expansions in quantum field theory calculations
Also note that this asymptotic series proves to be extremely precise, e.g. the theoretical result for $g-2$ calculated in this series agrees with the experiment to 10 significant digits. See en.wikipedia.org/wiki/Anomalous_magnetic_dipole_moment
Oct
6
comment Uniqueness of supersymmetric heterotic string theory
And could you suggest me where it is shown that these two solutions are unique? That was my question.
Oct
6
comment Uniqueness of supersymmetric heterotic string theory
Yes I'm sorry. I updated it.
Oct
5
comment Uniqueness of supersymmetric heterotic string theory
Don't you need c=24k for modular invariance?
Oct
5
comment Uniqueness of supersymmetric heterotic string theory
Do they satisfy the required specific "nice properties" to construct a heterotic string?
Oct
5
asked Uniqueness of supersymmetric heterotic string theory
Oct
5
comment Does 4D N = 3 supersymmetry exist?
Has anybody read Chap. 12 of ["Harmonic Superspace" ebooks.cambridge.org/ebook.jsf?bid=CBO9780511535109], titled "N=3 super Yang-Mills theory"? I've never understood whether what they describe is N=3 or N=4
Sep
7
awarded  Teacher
Sep
7
answered AQFT and the Standard Model
Apr
20
asked Supergravity calculation using computer algebra system in early days
Feb
25
comment Why are some solitons formed from bosonic fields fermionic?
Additional comment is that even in 4d, the WZW term can make a soliton constructed from scalar fields alone fermionic; the skyrmion becoming a baryon when the number of color is odd is the typical example. In a sense the Lagrangian in this case has a term which produces long-range phase.
Feb
11
awarded  Student
Feb
11
awarded  Scholar
Feb
11
accepted Pedagogical explanations of critical dimensions of string theories
Feb
11
comment Pedagogical explanations of critical dimensions of string theories
OK, I guess I need to go back to Polchinski's bible... thanks anyways
Feb
11
awarded  Supporter
Feb
11
comment Pedagogical explanations of critical dimensions of string theories
Thanks, could you list ten different ways, so that I can learn?
Feb
11
asked Pedagogical explanations of critical dimensions of string theories