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X-WR-CALNAME;VALUE=TEXT:Seminar: John Cardy (UC Berkeley & All Souls College, Oxford): "TTbar deformation of 2d quantum field theory and modular forms"
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SUMMARY:Seminar: John Cardy (UC Berkeley & All Souls College, Oxford): "TTbar deformation of 2d quantum field theory and modular forms"
DESCRIPTION:<strong><drupal-media data-entity-type="media" data-entity-uuid="4e039fd1-352e-4c15-ab29-d314518a7fe9" alt="John Cardy" data-view-mode="hwp_small"></drupal-media><br>Speaker:</strong> John Cardy (University of California, Berkeley, &amp; All Souls College, Oxford)<br><strong>Title: </strong>The TTbar deformation of 2d quantum field theory and modular forms<br><strong>Abstract: </strong>"TTbar" deformed 2d quantum field theory is a non-local theory in which Minkowski space is deformed in a state-dependent but consistent manner. For a massive theory this is equivalent to each particle acquiring a width proportional to its mass in its rest frame, giving rise to simple CDD factors dressing the $S$--matrix, but for deformed conformal field theories the spectrum becomes quite complicated, and the question of modular invariance of the torus partition function is non-trivial.  I will show that this leads to a theory of TTbar deformed modular forms in general. Maass forms turn out to play an important role as eigenforms of the deformation.
LOCATION:https://harvard.zoom.us/j/779283357?pwd=MitXVm1pYUlJVzZqT3lwV2pCT1ZUQT09
STATUS:CONFIRMED
DTSTART:20230404T133000Z
DTEND:20230404T133000Z
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