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CATEGORIES:Quantum Fields and Strings Seminars
SUMMARY:Imposter partition functions - Rohit Kalloor\, Wei
zmann
DTSTART;TZID=Europe/London:20221201T130000
DTEND;TZID=Europe/London:20221201T140000
UID:TALK184286AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/184286
DESCRIPTION:Recently introduced connections between quantum co
des and certain Narain CFT's let us write the part
ition functions of these CFT's in terms of objects
that arise naturally from codes -- the so-called
`enumerator polynomials'. The recipe involved mak
es it easy to write down other modular-invariant f
unctions that have an expansion in terms of u(1) c
haracters (with positive integer coefficients)\; s
uch functions are solutions to the modular bootstr
ap. However\, we show that they cannot arise as pa
rtition functions of any 2d (unitary) CFT. That is
\, for these spectra\, one cannot find a set of OP
E coefficients consistent with crossing\; but modu
lar bootstrap constraints are not enough to rule t
hem out. We consider only the simplest examples\,
keeping in mind that many more can be constructed.
LOCATION:Potter Room\, DAMTP
CONTACT:
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