Publications
2023
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Sublattice scars and beyond in two-dimensional U(1) quantum link lattice gauge theories
Indrajit Sau, Paolo Stornati, Debasish Banerjee, and Arnab Sen
Phys. Rev. D 109, 034519 () | arXiv:2311.06773 [hep-lat]In this article, we elucidate the structure and properties of a class of anomalous high-energy states of matter-free U(1) quantum link gauge theory Hamiltonians using numerical and analytical methods. Such anomalous states, known as quantum many-body …
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Eigenstate thermalization and its breakdown in quantum spin chains with inhomogeneous interactions
Ding-Zu Wang, Hao Zhu, Jian Cui, Javier Argüello-Luengo, Maciej Lewenstein, Guo-Feng Zhang, Piotr Sierant, and and Shi-Ju Ran
Phys. Rev. B 109, 045139 () | arXiv:2310.19333 quant-phThe eigenstate thermalization hypothesis (ETH) is a successful theory that establishes the criteria for ergodicity and thermalization in isolated quantum many-body systems. In this work, we investigate the thermalization properties of a spin-1/2 XXZ …
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Constrained Grover Adaptive Search for Optimization of the Bidirectional EV Charging Problem
Marika Federer, Steve Lenk, Daniel Müssig, Markus Wappler, and Jörg Lässig
INFORMATIK 2023 - Designing Futures: Zukünfte gestalten ()The optimization problem of bidirectional electrical vehicle charging (Vehicle-to-Home) becomes more and more important with rising energy prices and the required reduction of 𝐶𝑂2 emissions. We maximize the usage of local solar power generation, …
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Eichtheorien im Quantensimulator
Robert Ott and Philipp Hauke
Phys. Unserer Zeit 5 ()Gauge theories form the theoretical foundation of our understanding of many fields of science, in particular elementary particle physics and nuclear physics. They are, however, extremely difficult to treat with conventional methods such as analytical …
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Compression of Qubit Circuits: Mapping to Mixed-Dimensional Quantum Systems
Kevin Mato, Stefan Hillmich, and Robert Wille
2023 IEEE International Conference on Quantum Software (QSW) ()Quantum computers are becoming a reality thanks to the accomplishments made in recent years. The quantum computers available today offer hundreds of qubits but are still limited in the number of operations they can perform before errors accumulate …
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Variational quantum simulation of U(1) lattice gauge theories with qudit systems
Pavel P. Popov, Michael Meth, Maciej Lewenstein, Philipp Hauke, Martin Ringbauer, Erez Zohar, and Valentin Kasper
Phys. Rev. Research 6, 013202 () | arXiv:2307.15173 [quant-ph]Lattice gauge theories are fundamental to various fields, including particle physics, condensed matter, and quantum information theory. Recent progress in the control of quantum systems allows for studying Abelian lattice gauge theories in table-top …
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Guillem Müller-Rigat, Anubhav Kumar Srivastava, Stanisław Kurdziałek, Grzegorz Rajchel-Mieldzioć, Maciej Lewenstein, and Irénée Frérot
Quantum 7, 1152 () | arXiv:2306.12711 [quant-ph]We introduce a semidefinite programming algorithm to find the minimal quantum Fisher information compatible with an arbitrary dataset of mean values. This certification task allows one to quantify the resource content of a quantum system for …
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Entanglement Growth and Minimal Membranes in (d+1) Random Unitary Circuits
Piotr Sierant, Marco Schirò, Maciej Lewenstein, and Xhek Turkeshi
Phys. Rev. Lett. 131, 230403 () | arXiv:2306.04764 [cond-mat.stat-mech]Understanding the nature of entanglement growth in many-body systems is one of the fundamental questions in quantum physics. Here, we study this problem by characterizing the entanglement fluctuations and distribution of a (d+1)-dimensional qubit …
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Higher-Order Topological Peierls Insulator in a Two-Dimensional Atom-Cavity System
Joana Fraxanet, Alexandre Dauphin, Maciej Lewenstein, Luca Barbiero, and Daniel González-Cuadra
Phys. Rev. Lett. 131, 263001 () | arXiv:2305.03409 [cond-mat.quant-gas]In this work, we investigate a two-dimensional system of ultracold bosonic atoms inside an optical cavity, and show how photon-mediated interactions give rise to a plaquette-ordered bond pattern in the atomic ground state. The latter corresponds to a …
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Mohit Lal Bera, Jessica O. de Almeida, Marlena Dziurawiec, Marcin Płodzień, Maciej M. Maśka, Maciej Lewenstein, Tobias Grass, and Utso Bhattacharya
Phys. Rev. B 108, 214104 () | arXiv:2305.02025 [cond-mat.mes-hall]Su-Schrieffer-Heeger (SSH) chains are paradigmatic examples of 1D topological insulators hosting zero-energy edge modes when the bulk of the system has a non-zero topological winding invariant. Recently, high-harmonic spectroscopy has been suggested …
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Data re-uploading with a single qudit
Noah L. Wach, Manuel S. Rudolph, Fred Jendrzejewski, and Sebastian Schmitt
arXiv:2302.13932 [quant-ph]Quantum two-level systems, i.e. qubits, form the basis for most quantum machine learning approaches that have been proposed throughout the years. However, in some cases, higher dimensional quantum systems may prove to be advantageous. Here, we …
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Topological Bogoliubov quasiparticles from Bose-Einstein condensate in a flat band system
Zahra Jalali-Mola, Tobias Grass, Valentin Kasper, Maciej Lewenstein, and Utso Bhattacharya
Phys. Rev. Lett. 131, 226601 () | arXiv:2302.09910 [cond-mat.quant-gas]For bosons with flat energy dispersion, condensation can occur in different symmetry sectors. Here, we consider bosons in a Kagome lattice with π-flux hopping, which in the presence of mean-field interactions exhibit degenerate condensates in the Γ- …
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Strong laser physics, non-classical light states and quantum information science
Utso Bhattacharya, Theocharis Lamprou, Andrew S. Maxwell, Andrés F. Ordóñez, Emilio Pisanty, Javier Rivera-Dean, Philipp Stammer, Marcelo F. Ciappina, Maciej Lewenstein, and Paraskevas Tzallas
Rep. Prog. Phys. 86 094401 () | arXiv:2302.04692 [quant-ph]Strong–laser–field physics is a research direction that relies on the use of high-power lasers and has led to fascinating achievements ranging from relativistic particle acceleration to attosecond science. On the other hand, quantum optics has been …
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Probing quantum correlations in many-body systems: a review of scalable methods
Irénée Frérot, Matteo Fadel, and Maciej Lewenstein
arXiv:2302.00640 [quant-ph]We review methods that allow one to detect and characterise quantum correlations in many-body systems, with a special focus on approaches which are scalable. Namely, those applicable to systems with many degrees of freedom, without requiring a number …
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Inferring pointwise diffusion properties of single trajectories with deep learning
Borja Requena, Sergi Masó, Joan Bertran, Maciej Lewenstein, Carlo Manzo, and Gorka Muñoz-Gil
Biophysical Journal, 122.22: 4360-4369 () | arXiv:2302.00410 [cond-mat.soft]In order to characterize the mechanisms governing the diffusion of particles in biological scenarios, it is essential to accurately determine their diffusive properties. To do so, we propose a machine learning method to characterize diffusion …
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Compilation of Entangling Gates for High-Dimensional Quantum Systems
Kevin Mato, Martin Ringbauer, Stefan Hillmich, and Robert Wille
APSDAC ‘23: Proceedings of the 28th Asia and South Pacific Design Automation Conference () | arXiv:2301.04155 [quant-ph]Most quantum computing architectures to date natively support multi-valued logic, albeit being typically operated in a binary fashion. Multi-valued, or qudit, quantum processors have access to much richer forms of quantum entanglement, which promise …
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Topological stripe state in an extended Fermi-Hubbard model
Sergi Julià-Farré, Lorenzo Cardarelli, Maciej Lewenstein, Markus Müller, and Alexandre Dauphin
Phys. Rev. B 109, 075109 () | arXiv:2301.03312 [cond-mat.quant-gas]Interaction-induced topological systems have attracted a growing interest for their exotic properties going beyond the single-particle picture of topological insulators. In particular, the interplay between strong correlations and finite doping can …