96 citations · 346 across the 21 of their papers we have counts for
23 papers
The Grasshopper Problem on the Sphere
David Llamas, Dmitry Chistikov, Adrian Kent +2
The spherical grasshopper problem is a geometric optimization problem that arises in the context of Bell inequalities and can be interpreted as identifying the best local hidden va…
Transient Dynamical Phase Diagram of the Spin-Boson Model at Finite Temperature
Olga Goulko, Hsing-Ta Chen, Moshe Goldstein +1
We present numerically exact inchworm quantum Monte Carlo results for the real-time dynamics of the spin polarization in the sub-Ohmic spin-boson model at finite temperature. We fo…
Compact representation and long-time extrapolation of real-time data for quantum systems using the ESPRIT algorithm
Andre Erpenbeck, Yuanran Zhu, Yang Yu +6
Representing real-time data as a sum of complex exponentials provides a compact form that enables both denoising and extrapolation. As a fully data-driven method, the Estimation of…
Optimal Local Simulations of a Quantum Singlet
David Llamas, Dmitry Chistikov, Adrian Kent +2
Bell's seminal work showed that no local hidden variable (LHV) model can fully reproduce the quantum correlations of a two-qubit singlet state. His argument and later developments…
Transient dynamical phase diagram of the spin-boson model
Olga Goulko, Hsing-Ta Chen, Moshe Goldstein +1
We investigate the real-time dynamics of the sub-Ohmic spin-boson model across a broad range of coupling strengths, using the numerically exact inchworm quantum Monte Carlo algorit…
Origin of Symmetry Breaking in the Grasshopper Model
David Llamas, Jaron Kent-Dobias, Kun Chen +2
The planar grasshopper problem, originally introduced in (Goulko & Kent 2017 Proc. R. Soc. A 473, 20170494), is a striking example of a model with long-range isotropic interactions…
The Future of the Correlated Electron Problem
A. Alexandradinata, N. P. Armitage, Andrey Baydin +44
A central problem in modern condensed matter physics is the understanding of materials with strong electron correlations. Despite extensive work, the essential physics of many of t…
Globe-hopping
Dmitry Chistikov, Olga Goulko, Adrian Kent +1
We consider versions of the grasshopper problem (Goulko and Kent, 2017) on the circle and the sphere, which are relevant to Bell inequalities. For a circle of circumference , w…
Quasi-thermalization of collisionless particles in quadrupole potentials
Johnathan Lau, Olga Goulko, Thomas Reimann +4
We analyze several puzzling features of a recent experiment with a noninteracting gas of atoms in a quadrupole trap. After an initial momentum kick, the system reaches a stationary…
Collective modes of an imbalanced unitary Fermi gas
Johannes Hofmann, Frédéric Chevy, Olga Goulko +1
We study theoretically the collective mode spectrum of a strongly imbalanced two-component unitary Fermi gas in a cigar-shaped trap, where the minority species forms a gas of polar…
Implementation of the Bin Hierarchy Method for restoring a smooth function from a sampled histogram
Olga Goulko, Alexander Gaenko, Emanuel Gull +2
We present , a tool for restoring a smooth function from a sampled histogram using the bin hierarchy method. The theoretical background of the method is presented in…
Restoring a smooth function from its noisy integrals
Olga Goulko, Nikolay Prokof'ev, Boris Svistunov
Numerical (and experimental) data analysis often requires the restoration of a smooth function from a set of sampled integrals over finite bins. We present the bin hierarchy method…
The grasshopper problem
Olga Goulko, Adrian Kent
We introduce and physically motivate the following problem in geometric combinatorics, originally inspired by analysing Bell inequalities. A grasshopper lands at a random point on…
Numerical analytic continuation: Answers to well-posed questions
Olga Goulko, Andrey S. Mishchenko, Lode Pollet +2
We formulate the problem of numerical analytic continuation in a way that lets us draw meaningful conclusions about properties of the spectral function based solely on the input da…
Dark Continuum in the Spectral Function of the Resonant Fermi Polaron
Olga Goulko, Andrey S. Mishchenko, Nikolay Prokof'ev +1
We present controlled numerical results for the ground state spectral function of the resonant Fermi polaron in three dimensions. We establish the existence of a "dark continuum"--…
Numerical study of the unitary Fermi gas across the superfluid transition
Olga Goulko, Matthew Wingate
We present results from Monte Carlo calculations investigating the properties of the homogeneous, spin-balanced unitary Fermi gas in three dimensions. The temperature is varied acr…
Analog Simulation of Weyl Particles with Cold Atoms
Daniel Suchet, Mihail Rabinovic, Thomas Reimann +7
We study theoretically, numerically, and experimentally the relaxation of a collisionless gas in a quadrupole trap after a momentum kick. The non-separability of the potential enab…
Effect of spin-orbit interactions on the 0.7 anomaly in quantum point contacts
Olga Goulko, Florian Bauer, Jan Heyder +1
We study how the conductance of a quantum point contact is affected by spin-orbit interactions, for systems at zero temperature both with and without electron-electron interactions…
Boltzmann equation simulation for a trapped Fermi gas of atoms
Olga Goulko, Frédéric Chevy, Carlos Lobo
The dynamics of an interacting Fermi gas of atoms at sufficiently high temperatures can be efficiently studied via a numerical simulation of the Boltzmann equation. In this work we…
Collision of two spin polarized fermionic clouds
Olga Goulko, Frédéric Chevy, Carlos Lobo
We study the collision of two spin polarized Fermi clouds in a harmonic trap using a simulation of the Boltzmann equation. As observed in recent experiments we find three distinct…
The imbalanced Fermi gas at unitarity
Olga Goulko, Matthew Wingate
Lattice field theory is a useful tool for studying strongly interacting theories in condensed matter physics. A prominent example is the unitary Fermi gas: a two-component system o…
Thermodynamics of balanced and slightly spin-imbalanced Fermi gases at unitarity
Olga Goulko, Matthew Wingate
In this paper we present a Monte Carlo calculation of the critical temperature and other thermodynamic quantities for the unitary Fermi gas with a population imbalance (unequal num…
Monte Carlo study of a Fermi gas with infinite scattering length
Olga Goulko, Matthew Wingate
The Fermi gas at unitarity is a particularly interesting system of cold atoms, being dilute and strongly interacting at the same time. It can be studied non-perturbatively with Mon…