70 citations · 301 across the 21 of their papers we have counts for
21 papers
On Perturbatively Dressed Observables
Clifford Cheung, Allic Sivaramakrishnan, Jordan Wilson-Gerow +1
A central lesson of gravity is that local observables are ill-defined. Coordinates themselves are a redundancy of description, so any particular point in spacetime is only meaningf…
Composite AdS geodesics for CFT correlators and timelike entanglement entropy
Hardik Bohra, Allic Sivaramakrishnan
We study how to recover timelike worldlines in AdS from CFT data as a toy model for holographically reconstructing realistic observers. We give a bulk extremization procedure that…
Observer Time from Causality in Perturbative Quantum Gravity
Allic Sivaramakrishnan
It is unclear whether an observable notion of time exists in quantum gravity even in principle because spacetime itself fluctuates. We propose a form of observable time in perturba…
Correlation functions of von Neumann entropy
Mathew W. Bub, Allic Sivaramakrishnan
In this note, we study two-point correlation functions of modular Hamiltonians. We show that in general quantum systems, these correlators obey properties similar to those of von N…
Response of interferometers to the vacuum of quantum gravity
Daniel Carney, Manthos Karydas, Allic Sivaramakrishnan
It has recently been suggested that exotic quantum gravity effects could lead to large vacuum fluctuations, potentially observable with realistic detectors. Experiments are current…
Correlators of Worldline Proper Length
Allic Sivaramakrishnan
A classical observer can measure elapsed proper time along their worldline. When observers are coupled to a system with internal correlations, measurements of elapsed time may inhe…
An On-Shell Derivation of the Soft Effective Action in Abelian Gauge Theories
Temple He, Prahar Mitra, Allic Sivaramakrishnan +1
We derive the soft effective action in -dimensional abelian gauge theories from the on-shell action obeying Neumann boundary conditions at timelike and null infinity and Dir…
On Entropy Growth in Perturbative Scattering
Clifford Cheung, Temple He, Allic Sivaramakrishnan
Inspired by the second law of thermodynamics, we study the change in subsystem entropy generated by dynamical unitary evolution of a product state in a bipartite system. Working at…
On-shell Correlators and Color-Kinematics Duality in Curved Symmetric Spacetimes
Clifford Cheung, Julio Parra-Martinez, Allic Sivaramakrishnan
We define a perturbatively calculable quantity--the on-shell correlator--which furnishes a unified description of particle dynamics in curved spacetime. Specializing to the case of…
Information Geometry and Holographic Correlators
Hardik Bohra, Ashish Kakkar, Allic Sivaramakrishnan
We explore perturbative corrections to quantum information geometry. In particular, we study a Bures information metric naturally associated with the correlation functions of a con…
Towards Color-Kinematics Duality in Generic Spacetimes
Allic Sivaramakrishnan
In this note, we study color-kinematics duality in generic spacetimes. We work with a contact representation for on shell correlators. The position-space integrand is encoded by en…
CFT Unitarity and the AdS Cutkosky Rules
David Meltzer, Allic Sivaramakrishnan
We derive the Cutkosky rules for conformal field theories (CFTs) at weak and strong coupling. These rules give a simple, diagrammatic method to compute the double-commutator that a…
Anomalous Dimensions from Thermal AdS Partition Functions
Per Kraus, Stathis Megas, Allic Sivaramakrishnan
We develop an efficient method for computing thermal partition functions of weakly coupled scalar fields in AdS. We consider quartic contact interactions and show how to evaluate t…
Unitarity Methods in AdS/CFT
David Meltzer, Eric Perlmutter, Allic Sivaramakrishnan
We develop a systematic unitarity method for loop-level AdS scattering amplitudes, dual to non-planar CFT correlators, from both bulk and boundary perspectives. We identify cut ope…
Light-state Dominance from the Conformal Bootstrap
Per Kraus, Allic Sivaramakrishnan
We derive forms of light-state dominance for correlators in CFT, making precise the sense in which correlators can be approximated by the contribution of light operator exchang…
Late time Wilson lines
Per Kraus, Allic Sivaramakrishnan, River Snively
In the AdS/CFT correspondence, physical interest attaches to understanding Virasoro conformal blocks at large central charge and in a kinematical regime of large Lorentzian…
Entanglement Entropy with a Time-dependent Hamiltonian
Allic Sivaramakrishnan
The time evolution of entanglement tracks how information propagates in interacting quantum systems. We study entanglement entropy in CFT with a time-dependent Hamiltonian. We…
Black holes from CFT: Universality of correlators at large c
Per Kraus, Allic Sivaramakrishnan, River Snively
Two-dimensional conformal field theories at large central charge and with a sufficiently sparse spectrum of light states have been shown to exhibit universal thermodynamics. This t…
Localized Excitations from Localized Unitary Operators
Allic Sivaramakrishnan
Localized unitary operators are basic probes of locality and causality in quantum systems: localized unitary operators create localized excitations in entangled states. Working wit…
Color-Kinematic Duality in ABJM Theory Without Amplitude Relations
Allic Sivaramakrishnan
We explicitly show that the Bern-Carrasco-Johansson color-kinematic duality holds at tree level through at least eight points in Aharony-Bergman-Jafferis-Maldacena theory with gaug…
Low Order Aberrations in Band-Limited Lyot Coronagraphs
Anand Sivaramakrishnan, Remi Soummer, Allic V. Sivaramakrishnan +3
We study the way Lyot coronagraphs with unapodized entrance pupils respond to small, low order phase aberrations. This study is applicable to ground-based adaptive optics coronagra…