Computing the Many-Body green's function with adaptive variational quantum dynamics
We present a method to compute the many-body real-time Green's function using an
adaptive variational quantum dynamics simulation approach. The real-time Green's function …
adaptive variational quantum dynamics simulation approach. The real-time Green's function …
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 …
Quantum Algorithm for Imaginary-Time Green's Functions
Green's function methods lead to ab initio, systematically improvable simulations of
molecules and materials while providing access to multiple experimentally observable …
molecules and materials while providing access to multiple experimentally observable …
Quantum Computed Green's Functions using a Cumulant Expansion of the Lanczos Method
In this paper, we present a quantum computational method to calculate the many-body
Green's function matrix in a spin orbital basis. We apply our approach to finite-sized …
Green's function matrix in a spin orbital basis. We apply our approach to finite-sized …
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 …
On the Positive Definiteness of Response Functions in the Time Domain
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 …
charge susceptibilities, describe the response of a system to an external perturbation. They …
Adaptive Variational Quantum Computing Approaches for Green's Functions and Nonlinear Susceptibilities
We present and benchmark quantum computing approaches for calculating real-time single-
particle Green's functions and nonlinear susceptibilities of Hamiltonian systems. The …
particle Green's functions and nonlinear susceptibilities of Hamiltonian systems. The …
Denoising and Extension of Response Functions in the Time Domain
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 …
charge susceptibilities, describe the response of a system to an external perturbation. They …
Perspectives of running self-consistent DMFT calculations for strongly correlated electron systems on noisy quantum computing hardware
J Ehrlich, D Urban, C Elsässer - arxiv preprint arxiv:2311.10402, 2023 - arxiv.org
Dynamical Mean Field Theory (DMFT) is one of the powerful computatioinal approaches to
study electron correlation effects in solid-state materials and molecules. Its practical …
study electron correlation effects in solid-state materials and molecules. Its practical …
Phase Regularization and Additional Potential in Quantum Systems at the Potential Barrier to Maintain Adiabatic Condition
This research is theoretical research with a literature study that examines methods to
maintain characteristics of electrons when moving in a quantum system at the potential …
maintain characteristics of electrons when moving in a quantum system at the potential …