Entanglement in indistinguishable particle systems

F Benatti, R Floreanini, F Franchini, U Marzolino - Physics Reports, 2020 - Elsevier
For systems consisting of distinguishable particles, there exists an agreed upon notion of
entanglement which is fundamentally based on the possibility of addressing individually …

Does provable absence of barren plateaus imply classical simulability? Or, why we need to rethink variational quantum computing

M Cerezo, M Larocca, D García-Martín, NL Diaz… - arxiv preprint arxiv …, 2023 - arxiv.org
A large amount of effort has recently been put into understanding the barren plateau
phenomenon. In this perspective article, we face the increasingly loud elephant in the room …

Measures of complexity and entanglement in many-fermion systems

A Bulgac, M Kafker, I Abdurrahman - Physical Review C, 2023 - APS
There is no unique and widely accepted definition of the complexity measure (CM) of a
many-fermion wave function in the presence of interactions. The simplest many-fermion …

Nuclear shell-model simulation in digital quantum computers

A Pérez-Obiol, AM Romero, J Menéndez, A Rios… - Scientific Reports, 2023 - nature.com
The nuclear shell model is one of the prime many-body methods to study the structure of
atomic nuclei, but it is hampered by an exponential scaling on the basis size as the number …

Entanglement rearrangement in self-consistent nuclear structure calculations

C Robin, MJ Savage, N Pillet - Physical Review C, 2021 - APS
Background: Entanglement plays a central role in a diverse array of increasingly important
research areas, including quantum computation, simulation, measurement, sensing, and …

Showcasing a barren plateau theory beyond the dynamical lie algebra

NL Diaz, D García-Martín, S Kazi, M Larocca… - arxiv preprint arxiv …, 2023 - arxiv.org
Barren plateaus have emerged as a pivotal challenge for variational quantum computing.
Our understanding of this phenomenon underwent a transformative shift with the recent …

Quantum Information Orbitals (QIO): Unveiling Intrinsic Many-Body Complexity by Compressing Single-Body Triviality

K Liao, L Ding, C Schilling - The Journal of Physical Chemistry …, 2024 - ACS Publications
The simultaneous treatment of static and dynamic correlations in strongly correlated electron
systems is a critical challenge. In particular, finding a universal scheme for identifying a …

Entanglement entropy, single-particle occupation probabilities, and short-range correlations

A Bulgac - Physical Review C, 2023 - APS
For quantum many-body systems with short-range correlations (SRCs), the intimate
relationship between their magnitude, the behavior of the single-particle occupation …

Multi-body entanglement and information rearrangement in nuclear many-body systems: a study of the Lipkin–Meshkov–Glick model

SM Hengstenberg, CEP Robin, MJ Savage - The European Physical …, 2023 - Springer
We examine how effective-model-space (EMS) calculations of nuclear many-body systems
rearrange and converge multi-particle entanglement. The generalized Lipkin–Meshkov …

Quantum correlations, entanglement spectrum, and coherence of the two-particle reduced density matrix in the extended Hubbard model

DLB Ferreira, TO Maciel, RO Vianna, F Iemini - Physical Review B, 2022 - APS
We study the ground state properties of the one-dimensional extended Hubbard model at
half filling from the perspective of its particle reduced density matrix. We focus on the …