Robust Measurements of -Point Correlation Functions of Driven-Dissipative Quantum Systems on a Digital Quantum Computer
We propose and demonstrate a unified hierarchical method to measure n-point correlation
functions that can be applied to driven, dissipative, or otherwise open or nonequilibrium …
functions that can be applied to driven, dissipative, or otherwise open or nonequilibrium …
Time evolution of correlation functions in quantum many-body systems
We give rigorous analytical results on the temporal behavior of two-point correlation
functions—also known as dynamical response functions or Green's functions—in closed …
functions—also known as dynamical response functions or Green's functions—in closed …
From non-Hermitian linear response to dynamical correlations and fluctuation-dissipation relations in quantum many-body systems
KT Geier, P Hauke - PRX Quantum, 2022 - APS
Quantum many-body systems are characterized by their correlations. While equal-time
correlators and unequal-time commutators between operators are standard observables, the …
correlators and unequal-time commutators between operators are standard observables, the …
A linear response framework for quantum simulation of bosonic and fermionic correlation functions
Response functions are a fundamental aspect of physics; they represent the link between
experimental observations and the underlying quantum many-body state. However, this link …
experimental observations and the underlying quantum many-body state. However, this link …
Breaking the fluctuation-dissipation relation by universal transport processes
A Piñeiro Orioli, J Berges - Physical review letters, 2019 - APS
Universal phenomena far from equilibrium exhibit additional independent scaling exponents
and functions as compared to thermal universal behavior. For the example of an ultracold …
and functions as compared to thermal universal behavior. For the example of an ultracold …
Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations
A Schuckert, M Knap - Physical Review Research, 2020 - APS
The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the
approach to equilibrium of closed quantum many-body systems. So far, however …
approach to equilibrium of closed quantum many-body systems. So far, however …
Ancilla-free measurement of out-of-time-ordered correlation functions: General measurement protocol and Rydberg atom implementation
We introduce a protocol that gives access to out-of-time-ordered correlation functions in
many-body quantum systems. Unlike other such protocols, our proposal, which can be …
many-body quantum systems. Unlike other such protocols, our proposal, which can be …
A linear response framework for simulating bosonic and fermionic correlation functions illustrated on quantum computers
Response functions are a fundamental aspect of physics; they represent the link between
experimental observations and the underlying quantum many-body state. However, this link …
experimental observations and the underlying quantum many-body state. However, this link …
Reconstructing quantum entropy production to probe irreversibility and correlations
One of the major goals of quantum thermodynamics is the characterization of irreversibility
and its consequences in quantum processes. Here, we discuss how entropy production …
and its consequences in quantum processes. Here, we discuss how entropy production …
Detecting defect dynamics in relativistic field theories far from equilibrium using topological data analysis
V Noel, D Spitz - Physical Review D, 2024 - APS
We study nonequilibrium dynamics of relativistic N-component scalar field theories in
Minkowski space-time in a classical statistical regime, where typical occupation numbers of …
Minkowski space-time in a classical statistical regime, where typical occupation numbers of …