Green’s Function Perspective on the Nonlinear Density Response of Quantum Many-Body Systems
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Statistical Physics"
DOI: 10.1007/s10955-025-03454-5
Abstract: We derive equations of motion for higher order density response functions using the theory of thermodynamic Green’s functions. We also derive expressions for the higher order generalized dielectric functions and polarization functions. Moreover, we relate… read more here.
Keywords: higher order; density response; quantum many; response ... See more keywords
Complex Langevin and other approaches to the sign problem in quantum many-body physics
Sign Up to like & getrecommendations! Published in 2021 at "Physics Reports"
DOI: 10.1016/j.physrep.2020.09.002
Abstract: We review the theory and applications of complex stochastic quantization to the quantum many-body problem. Along the way, we present a brief overview of a number of ideas that either ameliorate or in some cases… read more here.
Keywords: many body; physics; problem; sign problem ... See more keywords
Experimental characterization of a quantum many-body system via higher-order correlations
Sign Up to like & getrecommendations! Published in 2017 at "Nature"
DOI: 10.1038/nature22310
Abstract: Quantum systems can be characterized by their correlations. Higher-order (larger than second order) correlations, and the ways in which they can be decomposed into correlations of lower order, provide important information about the system, its… read more here.
Keywords: order; system; quantum many; many body ... See more keywords
Quantum many-body simulations on digital quantum computers: State-of-the-art and future challenges
Sign Up to like & getrecommendations! Published in 2024 at "Nature Communications"
DOI: 10.1038/s41467-024-46402-9
Abstract: Simulating quantum many-body systems is a key application for emerging quantum processors. While analog quantum simulation has already demonstrated quantum advantage, its digital counterpart has recently become the focus of intense research interest due to… read more here.
Keywords: quantum many; quantum computers; digital quantum; many body ... See more keywords
Uncovering quantum many-body scars with quantum machine learning
Sign Up to like & getrecommendations! Published in 2024 at "npj Quantum Information"
DOI: 10.1038/s41534-025-01005-0
Abstract: Quantum many-body scars are rare eigenstates hidden within the chaotic spectra of many-body systems, representing a weak violation of the eigenstate thermalization hypothesis (ETH). Identifying these scars, as well as other non-thermal states in complex… read more here.
Keywords: quantum many; thermal states; body scars; non thermal ... See more keywords
Experimentally probing Landauer’s principle in the quantum many-body regime
Sign Up to like & getrecommendations! Published in 2024 at "Nature Physics"
DOI: 10.1038/s41567-025-02930-9
Abstract: Landauer’s principle bridges information theory and thermodynamics by linking the entropy change of a system during a process to the average energy dissipated to its environment. Although typically discussed in the context of erasing a… read more here.
Keywords: landauer principle; quantum many; many body; principle ... See more keywords
Solving Quantum Many-Particle Models with Graph Attention Network
Sign Up to like & getrecommendations! Published in 2024 at "Chinese Physics Letters"
DOI: 10.1088/0256-307x/41/3/030202
Abstract: Deep learning methods have been shown to be effective in representing ground-state wavefunctions of quantum many-body systems, however the existing approaches cannot be easily used for non-square like or large systems. Here, we propose a… read more here.
Keywords: graph attention; quantum many; attention network; solving quantum ... See more keywords
Spectroscopic Features of Quantum Many-Body Scar States
Sign Up to like & getrecommendations! Published in 2024 at "Chinese Physics Letters"
DOI: 10.1088/0256-307x/42/2/020502
Abstract: We studied the dynamic correlations of non-integrable systems with quantum many-body scar (QMBS) states generated by a ladder operator. The ladder operator’s spectral function has an exact δ-function peak induced by the QMBS states. As… read more here.
Keywords: quantum many; function; many body; body scar ... See more keywords
One-dimensional quantum many body systems with long-range interactions
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Physics A: Mathematical and Theoretical"
DOI: 10.1088/1751-8121/ab5634
Abstract: The presence of algebraically decaying long-range interactions may alter the critical as well as topological behaviour of a quantum many-body systems. However, when the interaction decays at a faster rate, the short-range behaviour is expected… read more here.
Keywords: many body; quantum many; body systems; range interactions ... See more keywords
Measuring work in quantum many-body systems using a dynamical work agent
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review B"
DOI: 10.1103/2p33-wy8h
Abstract: We consider a generic quantum many-body system initiated at thermal equilibrium and driven by an external parameter, and discuss the prospect for measuring the work done by the varying parameter on the system. While existing… read more here.
Keywords: quantum many; work; many body; work agent ... See more keywords
Floquet quantum many-body scars in the tilted Fermi-Hubbard chain
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review B"
DOI: 10.1103/4fpj-66gq
Abstract: The one-dimensional tilted, periodically driven Fermi-Hubbard chain is a paradigm in the study of quantum many-body physics, particularly for solid-state systems. We uncover the emergence of Floquet scarring states, a class of quantum many-body scarring… read more here.
Keywords: fermi hubbard; quantum many; hubbard chain; many body ... See more keywords