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The multiscale entanglement renormalization ansatz (MERA) provides a constructive algorithm for realizing wavefunctions that are inherently scale invariant. Unlike conformally invariant partition functions however, the finite bond dimension…

Strongly Correlated Electrons · Physics 2020-10-21 Karel Van Acoleyen , Andrew Hallam , Matthias Bal , Markus Hauru , Jutho Haegeman , Frank Verstraete

By combining the Grassmann algebra with multi-scale entanglement renormalization ansatz (MERA), we introduce a new unbiased and effective numerical method for simulating 2D strongly correlated electronic systems. The new GMERA method…

Strongly Correlated Electrons · Physics 2015-06-12 Jie Lou , Yan Chen

We point out that the MERA network for the ground state of a 1+1-dimensional conformal field theory has the same structural features as kinematic space---the geometry of CFT intervals. In holographic theories kinematic space becomes…

High Energy Physics - Theory · Physics 2016-08-24 Bartlomiej Czech , Lampros Lamprou , Samuel McCandlish , James Sully

The AdS/CFT correspondence conjectures a holographic duality between gravity in a bulk space and a critical quantum field theory on its boundary. Tensor networks have come to provide toy models to understand such bulk-boundary…

Quantum Physics · Physics 2019-08-13 Alexander Jahn , Marek Gluza , Fernando Pastawski , Jens Eisert

In this work we use cMERA, a continuous tensor network, to find a Gaussian approximation to the ground state of a $T\bar{T}$-deformed scalar CFT on the line, to first order in the deformation parameter. The result is used to find the…

High Energy Physics - Theory · Physics 2022-07-18 Biel Cardona , Javier Molina-Vilaplana

We investigate the entanglement structure of the continuous multi-scale entanglement renormalization ansatz (cMERA) [Haegeman et al., Phys. Rev. Lett., 110, 100402 (2013)] for ground states of quantum field theories (QFTs). The cMERA,…

Quantum Physics · Physics 2018-01-17 Adrián Franco-Rubio , Guifre Vidal

It is well known that the matrix product state (MPS) description of a gapped ground state with a global on-site symmetry can exhibit "symmetry fractionalization". Namely, even though the symmetry acts as a linear representation on the…

Strongly Correlated Electrons · Physics 2019-05-29 Sukhbinder Singh , Nathan McMahon , Gavin Brennen

In this work, we compute the entanglement entropy in continuous icMERA tensor networks for large $N$ models at strong coupling. Our results show that the $1/N$ quantum corrections to the Fisher information metric (interpreted as a local…

High Energy Physics - Theory · Physics 2022-04-07 Jose J. Fernandez-Melgarejo , Javier Molina-Vilaplana

The investigation of strongly-correlated quantum matter is difficult due to the curse of dimensionality and intricate entanglement structures. These challenges are particularly pronounced in the vicinity of continuous quantum phase…

Quantum Physics · Physics 2025-08-26 Qiang Miao , Tianyi Wang , Kenneth R. Brown , Thomas Barthel , Marko Cetina

The generalization of the multi-scale entanglement renormalization ansatz (MERA) to continuous systems, or cMERA [Haegeman et al., Phys. Rev. Lett, 110, 100402 (2013)], is expected to become a powerful variational ansatz for the ground…

Quantum Physics · Physics 2017-07-12 Qi Hu , Guifre Vidal

The Ryu-Takayanagi (RT) formula is a crucial concept in current theory of gauge-gravity duality and emergent phenomena of geometry. Recent reinterpretation of this formula in terms of a set of "bit threads" is an interesting effort in…

High Energy Physics - Theory · Physics 2020-06-29 Chong-Bin Chen , Fu-Wen Shu , Meng-He Wu

We present how the surface/state correspondence, conjectured in arXiv:1503.03542, works in the setup of AdS3/CFT2 by generalizing the formulation of cMERA. The boundary states in conformal field theories play a crucial role in our…

High Energy Physics - Theory · Physics 2015-10-28 Masamichi Miyaji , Tokiro Numasawa , Noburo Shiba , Tadashi Takayanagi , Kento Watanabe

Homogeneous Multi-scale Entanglement Renormalization Ansazt (MERA) state have been recently introduced to describe quantum critical systems. Here we present an extensive analysis of the properties of such states by clarifying the definition…

Quantum Physics · Physics 2015-05-13 V. Giovannetti , S. Montangero , M. Rizzi , R. Fazio

Tensor networks are useful toy models for understanding the structure of entanglement in holographic states and reconstruction of bulk operators within the entanglement wedge. They are, however, constrained to only prepare so-called…

High Energy Physics - Theory · Physics 2023-09-13 Xi Dong , Sean McBride , Wayne W. Weng

We propose an adaptation of Entanglement Renormalization for quantum field theories that, through the use of discrete wavelet transforms, strongly parallels the tensor network architecture of the \emph{Multiscale Entanglement…

High Energy Physics - Theory · Physics 2024-04-19 Daniele S. M. Alves

In the context of the AdS/CFT correspondence, we propose a general scheme for reconstructing bulk geometric quantities in a static pure AdS background using the partial entanglement entropy (PEE), a measure of the entanglement structure on…

High Energy Physics - Theory · Physics 2026-03-19 Jiong Lin , Yizhou Lu , Qiang Wen , Yiwei Zhong

In tensor networks, a geometric operation of pushing a bond cut surface toward a minimal surface corresponds to entanglement distillation. Cutting bonds defines a reduced transition matrix on the bond cut surface and the associated quantum…

High Energy Physics - Theory · Physics 2022-10-17 Takato Mori , Hidetaka Manabe , Hiroaki Matsueda

Motivated by the ground state structure of quantum models with all-to-all interactions such as mean-field quantum spin glass models and the Sachdev-Ye-Kitaev (SYK) model, we propose a tensor network architecture which can accomodate volume…

Quantum Physics · Physics 2024-05-29 Valérie Bettaque , Brian Swingle

We initiate the study of how tensor networks reproduce properties of static holographic space-times, which are not locally pure anti-de Sitter. We consider geometries that are holographically dual to ground states of defect, interface and…

High Energy Physics - Theory · Physics 2017-04-25 Bartlomiej Czech , Phuc H. Nguyen , Sivaramakrishnan Swaminathan

We investigate a new proposal connecting the geometry at various radial scales in asymptotic AdS spacetime with entanglement structure at corresponding real-space length scales of the boundary theory. With this proposal, the bulk IR…

High Energy Physics - Theory · Physics 2024-07-29 Xin-Xiang Ju , Teng-Zhou Lai , Bo-Hao Liu , Wen-Bin Pan , Ya-Wen Sun