DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Denoising and Extension of Response Functions in the Time Domain

Journal Article · · Physical Review Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]
  1. North Carolina State University, Raleigh, NC (United States); North Carolina State University; North Carolina State University
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States)

Response functions of quantum systems, such as electron Green’s functions, magnetic, or charge susceptibilities, describe the response of a system to an external perturbation. They are the central objects of interest in field theories and quantum computing and measured directly in experiment. Further, response functions are intrinsically causal. In equilibrium and steady-state systems, they correspond to a positive spectral function in the frequency domain. Since response functions define an inner product on a Hilbert space and thereby induce a positive definite function, the properties of this function can be used to reduce noise in measured data and, in equilibrium and steady state, to construct positive definite extensions for data known on finite time intervals, which are then guaranteed to correspond to positive spectra.

Research Organization:
North Carolina State University, Raleigh, NC (United States); Univ. of Michigan, Ann Arbor, MI (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
SC0023231; SC0022088
OSTI ID:
2345758
Alternate ID(s):
OSTI ID: 2473733
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 132; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (54)

Data for: A linear response framework for simulating bosonic and fermionic correlation functions on quantum computers dataset January 2023
Many–Body Quantum Theory in Condensed Matter Physics book September 2004
Quantum Monte Carlo Method in the Steady State journal May 2023
Positivity of the Spectral Densities of Retarded Floquet Green Functions journal April 2019
Phase retrieval, error reduction algorithm, and Fienup variants: a view from convex optimization journal January 2002
General Principles for the Nonequilibrium Relaxation of Populations in Quantum Materials journal October 2018
Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions journal January 1996
Diagrammatic Monte Carlo simulation of nonequilibrium systems journal January 2009
Computing a nearest symmetric positive semidefinite matrix journal May 1988
Lehmann representation of the nonequilibrium self-energy journal December 2015
A new approach to calculating the memory kernel of the generalized quantum master equation for an arbitrary system–bath coupling journal December 2003
�ber den Variabilit�tsbereich der Koeffizienten von Potenzreihen, die gegebene Werte nicht annehmen journal March 1907
Reduced Dynamics of Full Counting Statistics journal August 2022
Antiferromagnetism and d -wave superconductivity in cuprates: A cluster dynamical mean-field theory journal October 2000
Cellular Dynamical Mean Field Approach to Strongly Correlated Systems journal October 2001
Nonequilibrium Many-Body Theory of Quantum Systems book March 2013
Learning Feynman Diagrams with Tensor Trains journal November 2022
New Method for Calculating the One-Particle Green's Function with Application to the Electron-Gas Problem journal August 1965
Taming the Dynamical Sign Problem in Real-Time Evolution of Quantum Many-Body Problems journal December 2015
Fully self-consistent finite-temperature GW in Gaussian Bloch orbitals for solids journal December 2022
Cutting rules and positivity in finite temperature many-body theory journal August 2022
Tomographically reconstructed master equations for any open quantum dynamics journal July 2018
Monte Carlo Method for Magnetic Impurities in Metals journal June 1986
Excitations and spectra from equilibrium real-time Green's functions journal September 2022
Quantum cluster theories journal October 2005
Memory effects in nonequilibrium quantum impurity models journal August 2011
Nonlocal dynamical correlations of strongly interacting electron systems journal September 1998
Continuous-time auxiliary-field Monte Carlo for quantum impurity models journal May 2008
Dynamic Ion Structure Factor of Warm Dense Matter journal November 2012
Numerically exact long-time behavior of nonequilibrium quantum impurity models journal August 2011
Mapping the metal-insulator phase diagram by algebraically fast-forwarding dynamics on a cloud quantum computer journal June 2023
Numerically exact long-time magnetization dynamics at the nonequilibrium Kondo crossover of the Anderson impurity model journal May 2013
NESSi: The Non-Equilibrium Systems Simulation package journal December 2020
Continuous-Time Solver for Quantum Impurity Models journal August 2006
Hubbard model in infinite dimensions journal March 1992
Dynamical response in strongly coupled uniform electron liquids: Observation of plasmon-roton coexistence using nine sum rules, Shannon information entropy, and path-integral Monte Carlo simulations journal May 2023
Real-Time Path Integral Approach to Nonequilibrium Many-Body Quantum Systems journal May 2008
Continuous-time Monte Carlo methods for quantum impurity models journal May 2011
Nonequilibrium dynamical mean-field theory and its applications journal June 2014
Multiple emitter location and signal parameter estimation journal March 1986
Auxiliary Hamiltonian representation of the nonequilibrium Dyson equation journal January 2014
Monte Carlo calculations of coupled boson-fermion systems. I journal October 1981
Nevanlinna Analytical Continuation journal February 2021
Non-Markovian Dynamical Maps: Numerical Processing of Open Quantum Trajectories journal March 2014
Local Linear Convergence for Alternating and Averaged Nonconvex Projections journal November 2008
Über den zusammenhang der extremen von harmonischen funktionen mit ihren koeffizienten und über den picard-landau’schen satz journal December 1911
Bayesian inference and the analytic continuation of imaginary-time quantum Monte Carlo data journal May 1996
Analytical continuation of matrix-valued functions: Carathéodory formalism journal October 2021
On Projection Algorithms for Solving Convex Feasibility Problems journal September 1996
Continuous-time quantum Monte Carlo method for fermions journal July 2005
Effect of dynamical spectral weight redistribution on effective interactions in time-resolved spectroscopy journal August 2014
Conserving Approximations for Strongly Correlated Electron Systems: Bethe-Salpeter Equation and Dynamics for the Two-Dimensional Hubbard Model journal February 1989
Correlated Lattice Fermions in d = ∞ Dimensions journal January 1989
Superresolution of Green's functions on noisy quantum computers journal July 2023