activity
20212026
most citedAn Outsider's Perspective on Information Recovery in de Sitter Space

28 citations · 99 across the 30 of their papers we have counts for

collaborators

32 papers

hep-th2026

Finite-cutoff geometry in double-scaled SYK: SYK deformations, branes and CMC-Krylov complexity

Sergio E. Aguilar-Gutierrez

We develop a finite-cutoff holographic description of the double-scaled SYK (DSSYK) model. We construct microscopic deformations of Kourkoulou-Maldacena and thermofield-double SYK…

hep-th2026

Relational path integral, effective actions and quantum frame covariance in gravity

Sergio E. Aguilar-Gutierrez, Renata Ferrero, Philipp A. Hoehn +1

We propose a relational bundle-geometric formulation of the gravitational path integral by invoking the new tool of quantum reference frames (QRFs), which in gravity are gauge-cova…

hep-th2026

q-Askey Deformations of Double-Scaled SYK

Sergio E. Aguilar-Gutierrez, Trivko Kukolj, Josef Seitz

We construct families of deformations of the double-scaled SYK (DSSYK) model and investigate their bulk interpretation. We introduce microscopic deformations of the SYK model which…

hep-th2026

Deforming the Double-Scaled SYK & Reaching the Stretched Horizon From Finite Cutoff Holography

Sergio E. Aguilar-Gutierrez

We study the properties of the double-scaled SYK (DSSYK) model under chord Hamiltonian deformations based on finite cutoff holography for general dilaton gravity theories with Diri…

hep-th2026

Probing the Chaos to Integrability Transition in Double-Scaled SYK

Sergio E. Aguilar-Gutierrez, Rathindra Nath Das, Johanna Erdmenger +1

We investigate how a thermodynamical first-order phase transition affects the dynamical chaotic behaviour of a given model. To this effect, we analyze the model of Berkooz, Brukner…

hep-th2025

Cosmological Entanglement Entropy from the von Neumann Algebra of Double-Scaled SYK & Its Connection with Krylov Complexity

Sergio E. Aguilar-Gutierrez

We investigate entanglement entropy between the pair of type II algebras of the double-scaled SYK (DSSYK) model given a chord state, its holographic interpretation as generaliz…

hep-th2025

Evolution With(out) Time: Relational Holography & BPS Complexity Growth in Double-Scaled SYK

Sergio E. Aguilar-Gutierrez

How do we describe non-trivial bulk measurements relative to an observer (i.e. relationally) when both the observer and the system it probes may/may not evolve in time? How can we…

hep-th2025

Symmetry Sectors in Chord Space and Relational Holography in the DSSYK

Sergio E. Aguilar-Gutierrez

In holography, gauging symmetries of the boundary theory leads to important modifications in the bulk. In this work, we study constraints to gauge symmetry sectors in the chord Hil…

hep-th2025

Geometry of Chord Intertwiner, Multiple Shocks and Switchback in Double-Scaled SYK

Sergio E. Aguilar-Gutierrez, Jiuci Xu

We revisit the bulk Hilbert space interpretation of chords in the double-scaled SYK (DSSYK) model and introduce a notion of intertwiner that constructs bulk states from states with…

hep-th2025

Quasinormal modes and complexity in saddle-dominated SU(N) spin systems

Sergio E. Aguilar-Gutierrez, Yichao Fu, Kuntal Pal +1

We study SU() spin systems that mimic the behavior of particles in -dimensional de Sitter space for . Their Hamiltonians describe a dynamical system with hyperbolic fi…

hep-th2025★ 6 cited

Krylov operator complexity in holographic CFTs: Smeared boundary reconstruction and the dual proper radial momentum

Sergio E. Aguilar-Gutierrez, Hugo A. Camargo, Viktor Jahnke +2

Motivated by bulk reconstruction of smeared boundary operators, we study the Krylov complexity of local and non-local primary CFT operators from the local bulk-to-bulk propagat…

hep-th2025

Building the Holographic Dictionary of the DSSYK from Chords, Complexity & Wormholes with Matter

Sergio E. Aguilar-Gutierrez

In this work, we formulate the holographic dictionary for the double-scaled SYK (DSSYK) model with matter operators. Based on the two-sided Hartle-Hawking (HH) state, we derive sev…

hep-th2024

deformations in the double-scaled SYK model: Stretched horizon thermodynamics

Sergio E. Aguilar-Gutierrez

We study T-deformations in the DSSYK model \emph{after} performing ensemble averaging, to learn about the properties of its bulk dual geometry according to finite cutoff hologr…

hep-th2024★ 1 cited

deformations from AdS to dS

Sergio E. Aguilar-Gutierrez, Andrew Svesko, Manus R. Visser

We revisit the formalism of deformations for quantum theories that are holographically dual to two-dimensional dilaton-gravity theories with Dirichlet…

hep-th2024★ 1 cited

De Sitter space, complexity, and the double-scaled SYK model

S. E. Aguilar-Gutierrez

The cosmological horizon has an associated entropy suggesting that it might encode a quantum mechanical system on its surface. This has motivated extending the principles of the an…

hep-th2024★ 1 cited

Towards complexity in de Sitter space from the double-scaled Sachdev-Ye-Kitaev model

Sergio E. Aguilar-Gutierrez

How can we define complexity in dS space from microscopic principles? Based on recent developments pointing towards a correspondence between a pair of double-scaled Sachdev-Ye-Kita…

hep-th2024

Holographic complexity of the extended Schwarzschild-de Sitter space

Sergio E. Aguilar-Gutierrez, Stefano Baiguera, Nicoló Zenoni

According to static patch holography, de Sitter space admits a unitary quantum description in terms of a dual theory living on the stretched horizon, that is a timelike surface clo…

hep-th2024

Relational dynamics in axion-de Sitter universes

Sergio E. Aguilar-Gutierrez

We study the evolution of codimension-one maximal volume and related geometric observables according to a pair of dynamical reference frames (i.e. observers) in asymptotically de S…

hep-th2023★ 11 cited

Holographic complexity: braneworld gravity versus the Lloyd bound

Sergio E. Aguilar-Gutierrez, Ben Craps, Juan Hernandez +3

We explore the complexity equals volume proposal for planar black holes in anti-de Sitter (AdS) spacetime in 2+1 dimensions, with an end of the world (ETW) brane behind the horizon…

hep-th2023

Entanglement and factorization in axion-de Sitter universes

Sergio E. Aguilar-Gutierrez

We study extremal codimension-two areas and late-time bulk correlators between a pair of asymptotically de Sitter space universes connected through an Euclidean axion wormhole, in…

hep-th2023★ 1 cited

Krylov complexity is not a measure of distance between states or operators

Sergio E. Aguilar-Gutierrez, Andrew Rolph

We ask whether Krylov complexity is mutually compatible with the circuit and Nielsen definitions of complexity. We show that the Krylov complexities between three states fail to sa…

hep-th2023★ 3 cited

A multiverse model in dS wedge holography

Sergio E. Aguilar-Gutierrez, Filip Landgren

We construct a multiverse model where empty AdS space is cut off by a pair of accelerated dS space universes, at a finite AdS boundary cutoff which we treat as a …

hep-th2023★ 1 cited

Aspects of higher-curvature gravities with covariant derivatives

Sergio E. Aguilar-Gutierrez, Pablo Bueno, Pablo A. Cano +2

We study various aspects of higher-curvature theories of gravity built from contractions of the metric, the Riemann tensor and the covariant derivative, $\mathcal{L}(g^{ab},R_{abcd…

hep-th2023

C=Anything and the switchback effect in Schwarzschild-de Sitter space

Sergio E. Aguilar-Gutierrez

We investigate observables within the framework of the codimension-one C=Anything (CAny) proposal for Schwarzschild-de Sitter (SdS) space under the influence of shockwave sources.…