6 papers
Fortuity and fragility in supersymmetric SYK
James Chryssanthacopoulos, David Vegh
In the supersymmetric SYK model with fermions, every BPS state is fortuitous: at fixed charge, it exists only over a finite range of . Allowing the charge to…
Quantum mechanical bootstrap without inequalities: SYK bilinear spectrum
Kok Hong Thong, David Vegh
We study a quantum mechanical system whose spectrum coincides with that of bilinear operators of the Sachdev-Ye-Kitaev model. The standard positivity-based quantum mechanical boots…
Krylov Complexity of Supersymmetric SYK Models
James Chryssanthacopoulos, David Vegh
We study the effect of supersymmetry breaking on Krylov complexity in the SYK model under irrelevant and mass deformations of the Hamiltonian. The irrelevant deform…
A folded string dual for the Sachdev-Ye-Kitaev model
David Vegh
We propose a folded string moving in rigid AdS with imaginary radius squared as a dual of the Sachdev-Ye-Kitaev (SYK) model at its conformal fixed point. In standard AdS, t…
Quantizing the folded string in AdS
David Vegh
In two-dimensional flat space, the oscillatory motion of a closed folded string--or alternatively, two massless particles connected by a string--can be quantized using the 't Hooft…
Quantum mechanical bootstrap on the interval: obtaining the exact spectrum
Lewis Sword, David Vegh
We show that for a particular model, the quantum mechanical bootstrap is capable of finding exact results. We consider a solvable system with Hamiltonian , where an…