132 citations · 671 across the 23 of their papers we have counts for
24 papers
Analog quantum simulation of field theory with a superconducting transmission line
Ilan T. Rosen, Neill C. Warrington, Max Hays +4
Understanding the dynamics of interacting quantum fields remains a fundamental challenge. We propose a superconducting transmission line for analog quantum simulation of -di…
Faster Quantum Monte Carlo Simulation by Random Compilation
John M. Martyn, Joshua Lin, Neill C. Warrington +2
Quantum Monte Carlo (QMC) algorithms are among the most powerful classical methods for simulating quantum systems, yet their accuracy is often limited by the systematic errors in t…
Lattice field theory for superconducting circuits
Joshua Lin, Max Hays, Stephen Sorokanich +3
Large superconducting quantum circuits have a number of important applications in quantum computing. Accurately predicting the performance of these devices from first principles is…
Exact and approximate fluxonium array modes
Stephen Sorokanich, Max Hays, Neill C. Warrington
We present an exact solution for the linearized junction array modes of the superconducting qubit fluxonium in the absence of array disorder. This solution holds for arrays of any…
Real-time Spin Systems from Lattice Field Theory
Neill C. Warrington
We construct a lattice field theory method for computing the real-time dynamics of spin systems in a thermal bath. This is done by building on previous work of Takano with Schwinge…
The mass of charged pions in neutron star matter
Bryce Fore, Norbert Kaiser, Sanjay Reddy +1
We examine the behavior of charged pions in neutron-rich matter using heavy-baryon chiral perturbation theory. This study is motivated by the prospect that pions, or pion-like exci…
Lefschetz Thimble Quantum Monte Carlo for Spin Systems
T. C. Mooney, Jacob Bringewatt, Neill C. Warrington +1
Monte Carlo simulations are useful tools for modeling quantum systems, but in some cases they suffer from a sign problem, leading to an exponential slow down in their convergence t…
Path integral contour deformations for observables in gauge theory
William Detmold, Gurtej Kanwar, Henry Lamm +2
Path integral contour deformations have been shown to mitigate sign and signal-to-noise problems associated with phase fluctuations in lattice field theories. We define a family of…
Structure Factors of Neutron Matter at Finite Temperature
Andrei Alexandru, Paulo Bedaque, Evan Berkowitz +1
We compute continuum and infinite volume limit extrapolations of the structure factors of neutron matter at finite temperature and density. Using a lattice formulation of leading-o…
Complex Paths Around The Sign Problem
Andrei Alexandru, Gokce Basar, Paulo F. Bedaque +1
The Monte Carlo evaluation of path integrals is one of a few general purpose methods to approach strongly coupled systems. It is used in all branches of Physics, from QCD/nuclear p…
Path integral contour deformations for noisy observables
William Detmold, Gurtej Kanwar, Michael L. Wagman +1
Monte Carlo studies of many quantum systems face exponentially severe signal-to-noise problems. We show that noise arising from complex phase fluctuations of observables can be red…
Finite-Temperature Quarkyonic Matter with an Excluded Volume Model
Srimoyee Sen, Neill C. Warrington
We introduce a theoretical framework to analyze the thermal properties of a recently proposed "excluded volume" model of quarkyonic matter. This entails proposing finite temperatur…
Structure Factors of The Unitary Gas Under Supernova Conditions
Andrei Alexandru, Paulo F. Bedaque, Neill C. Warrington
We compute with lattice field theory the vector and axial static structure factors of the unitary gas for arbitrary temperature above the superfluid transition and for fugacities 0…
Gluon Field Digitization for Quantum Computers
Andrei Alexandru, Paulo F. Bedaque, Siddhartha Harmalkar +3
Simulations of gauge theories on quantum computers require the digitization of continuous field variables. Digitization schemes that uses the minimum amount of qubits are desirable…
Fermions at Finite Density in (2+1)d with Sign-Optimized Manifolds
Andrei Alexandru, Paulo F. Bedaque, Henry Lamm +2
We present Monte Carlo calculations of the thermodynamics of the (2+1) dimensional Thirring model at finite density. We bypass the sign problem by deforming the domain of integrati…
Spin Polarized Non-Relativistic Fermions in 1+1 Dimensions
Andrei Alexandru, Paulo F. Bedaque, Neill C. Warrington
We study by Monte Carlo methods the thermodynamics of a spin polarized gas of non-relativistic fermions in 1+1 dimensions. The main result of this work is that our action suffers n…
Neutrino-nucleon scattering in the neutrino-sphere
Paulo F. Bedaque, Sanjay Reddy, Srimoyee Sen +1
We calculate the differential scattering rate for thermal neutrinos in a hot and dilute gas of interacting neutrons using linear response theory. The dynamical structure factors fo…
A complex path around the sign problem
Paulo F. Bedaque
We review recent attempts at dealing with the sign problem in Monte Carlo calculations by deforming the region of integration in the path integral from real to complex fields. We d…
Tempered transitions between thimbles
Andrei Alexandru, Gokce Basar, Paulo F. Bedaque +1
Quantum field theories with complex actions cannot be investigated using importance sampling due to the sign problem. One possible solution is to use the holomorphic gradient flow,…
Monte Carlo calculations of the finite density Thirring model
Andrei Alexandru, Gokce Basar, Paulo F. Bedaque +2
We present results of the numerical simulation of the two-dimensional Thirring model at finite density and temperature. The severe sign problem is dealt with by deforming the domai…
Monte Carlo study of real time dynamics
Andrei Alexandru, Gokce Basar, Paulo F. Bedaque +2
Monte Carlo studies involving real time dynamics are severely restricted by the sign problem that emerges from highly oscillatory phase of the path integral. In this letter, we pre…
A study of symmetry breaking in a relativistic Bose gas using the contraction algorithm
Andrei Alexandru, Gokce Basar, Paulo Bedaque +2
A relativistic Bose gas at finite density suffers from a sign problem that makes direct numerical simulations not feasible. One possible solution to the sign problem is to re-expre…
Fast Estimator of jacobians in Monte Carlo Integration on Lefschetz Thimbles
Andrei Alexandru, Gokce Basar, Paulo F. Bedaque +2
A solution to the sign problem is the so-called "Lefschetz thimble approach" where the domain of integration for field variables in the path integral is deformed from the real axis…
Sign problem and Monte Carlo calculations beyond Lefschetz thimbles
Andrei Alexandru, Gokce Basar, Paulo F. Bedaque +2
We point out that Monte Carlo simulations of theories with severe sign problems can be profitably performed over manifolds in complex space different from the one with fixed imagin…