43 citations · 132 across the 14 of their papers we have counts for
14 papers
Bayesian Tracking of a Diffusing Target in Two and Three Dimensions
Ewan McCulloch, Adam Nahum
We study Bayesian tracking of a diffusing target monitored by a noisy distributed sensor array. Building on an earlier mapping to KPZ growth with a moving defect (or an equivalent…
KPZ Superdiffusion of Local Correlators in Diffusive Random Quantum Circuits
Ewan McCulloch
We study the single-particle Green's function in one-dimensional particle-number-conserving random unitary circuits coupled to an external…
Long-lived local quantum coherences from hydrodynamic large deviations
Ewan McCulloch, J. Alexander Jacoby, Sarang Gopalakrishnan
We develop a framework to describe how quantum coherences between distinct charge sectors evolve under generic charge-conserving dynamics. Our framework captures the nonperturbativ…
Anomalous diffusion and singular transport from hydrodynamic recoupling
Ewan McCulloch, Romain Vasseur, Sarang Gopalakrishnan
In charge neutral fluids, such as the Dirac fluid in graphene at the Dirac point, charge transport remains diffusive despite the presence of ballistically propagating sound waves:…
Subexponential decay of local correlations from diffusion-limited dephasing
Ewan McCulloch, J. Alexander Jacoby, Curt von Keyserlingk +1
Chaotic quantum systems at finite energy density are expected to act as their own heat baths, rapidly dephasing local quantum superpositions. We argue that in fact this dephasing i…
Monitored Fluctuating Hydrodynamics
Sarang Gopalakrishnan, Ewan McCulloch, Romain Vasseur
We introduce a hydrodynamic framework for describing monitored classical stochastic processes. We study the conditional ensembles for these monitored processes -- i.e., we compute…
Ballistic Modes as a Source of Anomalous Charge Noise
Ewan McCulloch, Romain Vasseur, Sarang Gopalakrishnan
Steady-state currents generically occur both in systems with continuous translation invariance and in nonequilibrium settings with particle drift. In either case, thermal fluctuati…
Emergence of Navier-Stokes hydrodynamics in chaotic quantum circuits
Hansveer Singh, Ewan McCulloch, Sarang Gopalakrishnan +1
We construct an ensemble of two-dimensional nonintegrable quantum circuits that are chaotic but have a conserved particle current, and thus a finite Drude weight. The long-waveleng…
Non-Gaussian diffusive fluctuations in Dirac fluids
Sarang Gopalakrishnan, Ewan McCulloch, Romain Vasseur
Dirac fluids - interacting systems obeying particle-hole symmetry and Lorentz invariance - are among the simplest hydrodynamic systems; they have also been studied as effective des…
Emergence of fluctuating hydrodynamics in chaotic quantum systems
Julian F. Wienand, Simon Karch, Alexander Impertro +6
A fundamental principle of chaotic quantum dynamics is that local subsystems eventually approach a thermal equilibrium state. Large subsystems thermalize slower: their approach to…
Quantum turnstiles for robust measurement of full counting statistics
Rhine Samajdar, Ewan McCulloch, Vedika Khemani +2
We present a scalable protocol for measuring full counting statistics (FCS) in experiments or tensor-network simulations. In this method, an ancilla in the middle of the system act…
Full Counting Statistics of Charge in Chaotic Many-body Quantum Systems
Ewan McCulloch, Jacopo De Nardis, Sarang Gopalakrishnan +1
We investigate the full counting statistics of charge transport in -symmetric random unitary circuits. We consider an initial mixed state prepared with a chemical potential i…
Operator Spreading in the Memory Matrix Formalism
Ewan McCulloch, C. W. von Keyserlingk
The spread and scrambling of quantum information is a topic of considerable current interest. Numerous studies suggest that quantum information evolves according to hydrodynamical…
Haar averaged moments of correlation functions and OTOCs in Floquet systems
Ewan McCulloch
Scrambling and thermalisation are topics of intense study in both condensed matter and high energy physics. Random unitary dynamics form a simple testing-ground for our theoretical…