David Vegh

We propose a "folded string" moving in rigid AdS2 with imaginary radius squared as a dual of the Sachdev–Ye–Kitaev (SYK) model at its conformal fixed point. In standard AdS2, the string is represented by two massless particles connected by straight string segments. The particles move at the speed of light, abruptly reversing direction at turning points. We describe the system using the lightcone coordinates of these points, with the Poisson structure obtained from the Peierls bracket. In AdS2 with imaginary radius squared, quantization of the string’s mass-squared in momentum-fraction space yields a Pöschl–Teller equation, reproducing the SYK operator spectrum. Join Zoom Meeting https://belgrade-strings-ipb-ac-rs.zoom.us/j/6664242666?pwd=QW5UjVWFuadA4MBhB0K6wockM1OxPZ.1&omn=91997037723 Meeting ID: 666 4242 666 Passcode: 314159