Doubled Hilbert space in double-scaled SYK

Abstract

We consider matter correlators in the double-scaled SYK (DSSYK) model. It turns out that matter correlators have a simple expression in terms of the doubled Hilbert space $$\mathcal{H}\otimes \mathcal{H}$$, where $$\mathcal{H}$$ is the Fock space of q-deformed oscillator (also known as the chord Hilbert space). In this formalism, we find that the operator which counts the intersection of chords should be conjugated by certain “entangler” and “disentangler”. We explicitly demonstrate this structure for the two- and four-point functions of matter operators in DSSYK.