Publications
2025
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Device-independent Shannon entropy certification
Robert Okuła and Remigiusz Augusiak
New J. Phys. 27 114519 () | arXiv:2505.05395 [quant-ph]Quantum technologies promise information processing and communication technology advancements, including random number generation (RNG). Using Bell inequalities, a user of a quantum RNG hardware can certify that the values provided by an untrusted …
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Entanglement witnesses for stabilizer states and subspaces beyond qubit
Jakub Szczepaniak, Owidiusz Makuta, and Remigiusz Augusiak
Rep. Prog. Phys. 88 117602 () | arXiv:2508.13734 [quant-ph]Genuine multipartite entanglement (GME) is arguably the most valuable form of entanglement in the multipartite case with application for instance in quantum metrology. In order to detect that form of entanglement in multipartite quantum states, one …
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Deep Neural Network-assisted improvement of quantum compressed sensing tomography
Adriano Macarone-Palmieri, Leonardo Zambrano, Maciej Lewenstein, Antonio Acín, and Donato Farina
Phys. Scr. 100 115106 () | arXiv:2405.10052 [quant-ph]Quantum compressed sensing is a fundamental technique for tomographic reconstruction of low-rank density matrices in informationally incomplete scenarios. However, when the available measurement data is insufficient, standard compressed sensing, like …
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Inequality constraints in variational quantum circuits with qudits
Alberto Bottarelli, Sebastian Schmitt, and Philipp Hauke
Phys. Rev. Research 7, 033202 () | arXiv:2410.07674 [quant-ph]Quantum optimization is emerging as a prominent candidate for exploiting the capabilities of near-term quantum devices. Many application-relevant optimization tasks require the inclusion of inequality constraints, usually handled by enlarging the …
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All genuinely entangled stabilizer subspaces are multipartite fully nonlocal
Owidiusz Makuta and Remigiusz Augusiak
npj Quantum Inf 11, 144 () | arXiv:2312.08757 [quant-ph]Understanding which entangled states give rise to Bell nonlocality and thus are resourceful in the device-independent framework is a long-standing unresolved problem. Here, we establish the equivalence between genuine entanglement and genuine …
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Nonperturbative signatures of fractons in the twisted multiflavor Schwinger Model
Pavel P. Popov, Valentin Kasper, Maciej Lewenstein, Erez Zohar, Paolo Stornati, and Philipp Hauke
Phys. Rev. D 112, 014515 () | arXiv:2405.00745 [hep-lat]Gauge-field configurations with nontrivial topology have profound consequences for the physics of Abelian and non-Abelian gauge theories. Over time, arguments have been gathering for the existence of gauge-field configurations with fractional …
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Many-body quantum resources of graph states
Marcin Płodzień, Maciej Lewenstein, and Jan Chwedeńczuk
Rep. Prog. Phys. 88 077601 () | arXiv:2410.12487 [quant-ph]Characterizing the non-classical correlations of a complex many-body system is an important part of quantum technologies. An ideal tool for this task would scale well with the size of the system, be easily computable and be easily measurable. In this …
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Efficient Qudit Circuit for Quench Dynamics of \(2+1D\) Quantum Link Electrodynamics
Rohan Joshi, Michael Meth, Jan C. Louw, Jesse J. Osborne, Kevin Mato, Martin Ringbauer, and Jad C. Halimeh
arXiv:2507.12589 [quant-ph] ()A major challenge in the burgeoning field of quantum simulation for high-energy physics is the realization of scalable \(2+1\)D lattice gauge theories on state-of-the-art quantum hardware, which is an essential step towards the overarching goal of …
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Emanuele Gaz, Pavel P. Popov, Guy Pardo, Maciej Lewenstein, Philipp Hauke, and Erez Zohar
Phys. Rev. Research 7, 033012 () | arXiv:2501.17863 [hep-lat]Quantum simulation of lattice gauge theories (LGTs) provides a powerful framework for understanding nonperturbative phenomena. However, to realize the hope of answering challenging physics questions on near-term devices it is crucial to develop …
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Certifying classes of d-outcome measurements with quantum steering
Alexandre C. Orthey and Remigiusz Augusiak
New J. Phys. 27 064501 () | arXiv:2410.20477 [quant-ph]Device-independent (DI) certification schemes are based on minimal assumptions about the quantum system under study, which makes the most desirable among certification schemes. However, they are often the most challenging to implement. In order to …
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Device-Independent Quantum Key Distribution beyond qubits
Javier Rivera-Dean, Anna Steffinlongo, Neil Parker-Sánchez, Antonio Acín, and Enky Oudot
New J. Phys. 27 054512 () | arXiv:2402.00161 [quant-ph]Device-independent quantum key distribution (DIQKD) aims to generate secret keys between two parties without relying on trust in their employed devices, imposing strict constraints on the experimental conditions needed for successful key generation. …
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Jens Engel, Andrea Castellani, Patricia Wollstadt, Felix Lanfermann, Thomas Schmitt, Sebastian Schmitt, Lydia Fischer, Steffen Limmer, David Luttropp, Florian Jomrich, René Unger, and Tobias Rodemann
Sci Data 12, 864 () | arXiv:2503.11469 [eess.SY]We present a large real-world dataset obtained from monitoring a smart company facility over the course of six years, from 2018 to 2023. The dataset includes energy consumption data from various facility areas and components, energy production data …
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Quantum algorithms for inverse participation ratio estimation in multiqubit and multiqudit systems
Yingjian Liu, Piotr Sierant, Paolo Stornati, Maciej Lewenstein, and Marcin Płodzień
Phys. Rev. A 111, 052614 () | arXiv:2405.03338 [quant-ph]Inverse participation ratios (IPRs) and the related participation entropies quantify the spread of a quantum state over a selected basis of the Hilbert space, offering insights into the equilibrium and nonequilibrium properties of the system. In this …
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Slow decay rate of correlations induced by long-range extended Dzyaloshinskii-Moriya interactions
Tanoy Kanti Konar, Leela Ganesh Chandra Lakkaraju, and Aditi Sen De
Phys. Rev. A 111, 052402 () | arXiv:2407.21668 [quant-ph]We examine the impact of long-range Dzyaloshinskii-Moriya (DM) interaction in the extended \(XY\) model on the phase diagram as well as the static and dynamical properties of quantum and classical correlation functions. It is known that in the …
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Quantum-enhanced sensing with variable-range interactions
Monika Mothsara, Leela Ganesh Chandra Lakkaraju, Srijon Ghosh, and Aditi Sen De
Phys. Rev. A 111, 042628 () | arXiv:2307.06901 [quant-ph]The typical bound on parameter estimation, known as the standard quantum limit (SQL), can be surpassed by exploiting quantum resources such as entanglement. To estimate the magnetic probe field, we propose a quantum sensor based on a variable-range …
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A Monte Carlo Tree Search approach to QAOA: finding a needle in the haystack
Andoni Agirre, Evert van Nieuwenburg, and Matteo M Wauters
New J. Phys. 27 043014 () | arXiv:2408.12648 [quant-ph]The search for quantum algorithms to tackle classical combinatorial optimization problems has long been one of the most attractive yet challenging research topics in quantum computing. In this context, variational quantum algorithms (VQAs) are a …
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Qudit-native measurement protocol for dynamical correlations using Hadamard tests
Pavel P. Popov, Kevin T. Geier, Valentin Kasper, Maciej Lewenstein, and Philipp Hauke
Phys. Rev. A 111, 042604 () | arXiv:2407.03421 [quant-ph]Dynamical correlations reveal important out-of-equilibrium properties of the underlying quantum many-body system, yet they are notoriously difficult to measure in experiments. While measurement protocols for dynamical correlations based on Hadamard …
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Quantum Algorithms in Practice: Application to Ground-State Energy Estimation
Oriel Kiss, Utkarsh Azad, Borja Requena, Alessandro Roggero, David Wakeham, and uan Miguel Arrazol
Quantum 9, 1682 ()We investigate the feasibility of early fault-tolerant quantum algorithms focusing on ground-state energy estimation problems. In particular, we examine the computation of the cumulative distribution function (CDF) of the spectral measure of a …
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Symmetry-protection Zeno phase transition in monitored lattice gauge theories
Matteo M. Wauters, Edoardo Ballini, Alberto Biella, and Philipp Hauke
Phys. Rev. B 111, 094315 () | arXiv:2405.18504 [quant-ph, hep-lat]Quantum measurements profoundly influence system dynamics. They lead to complex nonequilibrium phenomena like the quantum Zeno effect, and they can be used for mitigating errors in quantum simulations. Such an ability is particularly valuable for …
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Simulating two-dimensional lattice gauge theories on a qudit quantum computer
Michael Meth, Jinglei Zhang, Jan F. Haase, Claire Edmunds, and Lukas Postler et al.
Nat. Phys. 21, 570–576 () | arXiv:2310.12110 [quant-ph]Particle physics describes the interplay of matter and forces through gauge theories. Yet, the intrinsic quantum nature of gauge theories makes important problems notoriously difficult for classical computational techniques. Quantum computers offer a …
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Genuine multipartite entanglement in quantum optimization
Gopal Chandra Santra, Sudipto Singha Roy, Daniel J. Egger, and Philipp Hauke
Phys. Rev. A 111, 022434 () | arXiv:2411.08119 [quant-ph]The ability to generate bipartite entanglement in quantum computing technologies is widely regarded as pivotal. However, the role of genuinely multipartite entanglement is much less understood than bipartite entanglement, particularly in the context …
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Kacper Cybiński, Marcin Płodzień, Michał Tomza, Maciej Lewenstein, Alexandre Dauphin, and Anna Dawid
Mach. Learn.: Sci. Technol. 6 015014 ()Machine learning (ML) is a promising tool for the detection of phases of matter. However, ML models are also known for their black-box construction, which hinders understanding of what they learn from the data and makes their application to novel …
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Engineering a Josephson junction chain for the simulation of the quantum clock model
Matteo M. Wauters, Lorenzo Maffi, and Michele Burrello
Phys. Rev. B 111, 045418 () | arXiv:2408.14549 [cond-mat.mes-hall]The continuous improvement of fabrication techniques and high-quality semiconductor-superconductor interfaces allows for an unprecedented tunability of Josephson junction arrays (JJA), making them a promising candidate for analog quantum simulations …
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Cold-atom quantum simulators of gauge theories
Jad C. Halimeh, Monika Aidelsburger, Fabian Grusdt, Philipp Hauke, and Bing Yang
Nat. Phys. 21, 25–36 ()Gauge theories constitute the basis of the Standard Model and provide useful descriptions of various phenomena in condensed matter. Realizing gauge theories on tunable tabletop quantum devices such as cold-atom quantum simulators offers the …
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Confinement in a \(Z2\) lattice gauge theory on a quantum computer
Julius Mildenberger, Wojciech Mruczkiewicz, Jad C. Halimeh, Zhang Jiang, and Philipp Hauke
Nat. Phys. 21, 312–317 ()Gauge theories describe the fundamental forces in the standard model of particle physics and play an important role in condensed-matter physics. The constituents of gauge theories, for example, charged matter and electric gauge field, are governed by …
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Inherent quantum resources in the stationary spin chains
Marcin Płodzień, Jan Chwedeńczuk, and Maciej Lewenstein
Phys. Rev. A 111, 012417 () | arXiv:2405.16974 [quant-ph]The standard way to generate many-body quantum correlations is via a dynamical protocol: an initial product state is transformed by interactions that generate nonclassical correlations at later times. Here, we show that many-body Bell correlations …