Publications
2023
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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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Optimal Flight-Gate Assignment on a Digital Quantum Computer
Yahui Chai, Lena Funcke, Tobias Hartung, Karl Jansen, Stefan Kühn, Paolo Stornati, and Tobias Stollenwerk
Phys. Rev. Applied 20, 064025 () | arXiv:2302.11595 [quant-ph]We investigate the performance of the variational quantum eigensolver (VQE) for the problem of optimal flight-gate assignment. This is a combinatorial-optimization problem that aims at finding an optimal assignment of flights to the gates of an …
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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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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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Quantum-inspired encoding enhances stochastic sampling of soft matter systems
Francesco Slongo, Philipp Hauke, Pietro Faccioli, and Cristian Micheletti
Sci. Adv. 9, eadi0204 ()Quantum advantage in solving physical problems is still hard to assess due to hardware limitations. However, algorithms designed for quantum computers may engender transformative frameworks for modeling and simulating paradigmatically hard systems. …
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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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Phonon-assisted coherent transport of excitations in Rydberg-dressed atom arrays
Arkadiusz Kosior, Servaas Kokkelmans, Maciej Lewenstein, Jakub Zakrzewski, and Marcin Płodzień
Phys. Rev. A 108, 043308 () | arXiv:2307.04471 [cond-mat.quant-gas]Polarons, which arise from the self-trapping interaction between electrons and lattice distortions in a solid, have been known and extensively investigated for nearly a century. Nevertheless, the study of polarons continues to be an active and …
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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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On the role of entanglement in qudit-based circuit compression
Xiaoqin Gao, Paul Appel, Nicolai Friis, Martin Ringbauer, and Marcus Huber
Quantum 7, 1141 () | arXiv:2209.14584 [quant-ph]Gate-based universal quantum computation is formulated in terms of two types of operations: local single-qubit gates, which are typically easily implementable, and two-qubit entangling gates, whose faithful implementation remains one of the major …
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Frustrated magnets without geometrical frustration in bosonic flux ladders
Luca Barbiero, Josep Cabedo, Maciej Lewenstein, Leticia Tarruell, and Alessio Celi
Phys. Rev. Research 5, L042008 () | arXiv:2212.06112 [cond-mat.quant-gas]We propose a scheme to realize a frustrated Bose-Hubbard model with ultracold atoms in an optical lattice that comprises the frustrated spin-1/2 quantum XX model. Our approach is based on a square ladder of magnetic flux ∼π with one real and one …
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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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Mikel Garcia De Andoin, Alberto Bottarelli, Sebastian Schmitt, Izaskun Oregi, Philipp Hauke, and Mikel Sanz
2023 IEEE 26th International Conference on Intelligent Transportation Systems (ITSC), Bilbao, Spain, 2023, pp. 5318-5323 ()Combinatorial optimization problems have attracted much interest in the quantum computing community in the recent years as a potential testbed to showcase quantum advantage. In this paper, we show how to exploit multilevel carriers of quantum …
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Probing quantum correlations in many-body systems: a review of scalable methods
Irénée Frérot, Matteo Fadel, and Maciej Lewenstein
Rep. Prog. Phys. 86 114001 () | 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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Mixed-Dimensional Quantum Circuit Simulation with Decision Diagrams
Kevin Mato, Stefan Hillmich, and Robert Wille
2023 IEEE International Conference on Quantum Computing and Engineering (QCE), Bellevue, WA, USA, 2023, pp. 978-989 ()Quantum computers promise to solve several categories of problems faster than classical computers ever could. Current research mostly focuses on qubits, i.e., systems where the unit of information can assume only two levels. However, the underlying …
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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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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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Data re-uploading with a single qudit
Noah L. Wach, Manuel S. Rudolph, Fred Jendrzejewski, and Sebastian Schmitt
Quantum Mach. Intell. 5, 36 () | 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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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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Enhancing Qubit Readout with Autoencoders
Piero Luchi, Paolo E. Trevisanutto, Alessandro Roggero, Jonathan L. DuBois, Yaniv J. Rosen, Francesco Turro, Valentina Amitrano, and Francesco Pederiva
Phys. Rev. Applied 20, 014045 () | arXiv:2212.00080 [quant-ph]In addition to the need for stable and precisely controllable qubits, quantum computers take advantage of good readout schemes. Superconducting qubit states can be inferred from the readout signal transmitted through a dispersively coupled resonator. …
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Solving the Optimization Problem of Bidirectional EV-Charging on a Quantum Computer
Daniel Müssig, Marika Federer, Steve Lenk, and Jörg Lässig
Proceedings of 23. Nachwuchswissenschaftler*innenkonferenz ()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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Engineering random spin models with atoms in a high-finesse cavity
Nick Sauerwein, Francesca Orsi, Philipp Uhrich, Soumik Bandyopadhyay, Francesco Mattiotti, Tigrane Cantat-Moltrecht, Guido Pupillo, Philipp Hauke, and Jean-Philippe Brantut
Nat. Phys. 19, 1128-1134 () | arXiv:2208.09421 [cond-mat.quant-gas]All-to-all interacting, disordered quantum many-body models have a wide range of applications across disciplines, from spin glasses in condensed-matter physics over holographic duality in high-energy physics to annealing algorithms in quantum …
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Quantum error correction with gauge symmetries
Abhishek Rajput, Alessandro Roggero, and Nathan Wiebe
npj Quantum Inf 9, 41 () | arXiv:2112.05186 [quant-ph]Quantum simulations of lattice gauge theories (LGTs) are often formulated on an enlarged Hilbert space containing both physical and unphysical sectors in order to retain a local Hamiltonian. We provide simple fault-tolerant procedures that exploit …
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Importance sampling for stochastic quantum simulations
Oriel Kiss, Michele Grossi, and Alessandro Roggero
Quantum 7, 977 () | arXiv:2212.05952 [quant-ph]Simulating complex quantum systems is a promising task for digital quantum computers. However, the depth of popular product formulas scales with the number of summands in the Hamiltonian, which can therefore be challenging to implement on near-term …
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Slow dynamics of a mobile impurity interacting with an Anderson insulator
Piotr Sierant, Titas Chanda, Maciej Lewenstein, and Jakub Zakrzewski
Phys. Rev. B 107, 144201 () | arXiv:2212.07107 [cond-mat.dis-nn]We investigate dynamics of a single mobile impurity immersed in a bath of Anderson localized particles and focus on the regime of relatively strong disorder and interactions. In that regime, the dynamics of the system is particularly slow, …
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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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Non-Abelian gauge invariance from dynamical decoupling
Valentin Kasper, Torsten V. Zache, Fred Jendrezejewski, Maciej Lewenstein, and Erez Zohar
Phys. Rev. D 107, 014506 ()Lattice gauge theories are fundamental to such distinct fields as particle physics, condensed matter or quantum information theory. The recent progress in the control of artificial quantum systems already allows for studying Abelian lattice gauge …