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Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum sampling algorithms for quantum state preparation and matrix block-encoding
Jessica Lemieux, Matteo Lostaglio, Sam Pallister +4 more·May 19, 2024
The problems of quantum state preparation and matrix block-encoding are ubiquitous in quantum computing: they are crucial parts of various quantum algorithms for the purpose for initial state preparation as well as loading problem relevant data. We f...
Storage and retrieval of von Neumann measurements via indefinite causal order structures
Paulina Lewandowska, Ryszard Kukulski·May 18, 2024
This work presents the problem of learning an unknown von Neumann measurement of dimension $d$ using indefinite causal structures. In the considered scenario, we have access to $N$ copies of the measurement. We use formalism of process matrices to st...
Simulating X-ray absorption spectroscopy of battery materials on a quantum computer
Stepan Fomichev, Kasra Hejazi, Ignacio Loaiza +5 more·May 17, 2024
X-ray absorption spectroscopy is a crucial experimental technique for elucidating the mechanisms of structural degradation in battery materials. However, extracting information from the measured spectrum is challenging without high-quality simulation...
High-throughput assessment of defect-nuclear spin register controllability for quantum memory applications
Filippos Dakis, E. Takou, Edwin Barnes +1 more·May 17, 2024
Quantum memories play a key role in facilitating tasks within quantum networks and quantum information processing, including secure communications, advanced quantum sensing, and distributed quantum computing. Progress in characterizing large nuclear ...
ZX-calculus is Complete for Finite-Dimensional Hilbert Spaces
Boldizsár Poór, R. A. Shaikh, Quanlong Wang·May 17, 2024
The ZX-calculus is a graphical language for reasoning about quantum computing and quantum information theory. As a complete graphical language, it incorporates a set of axioms rich enough to derive any equation of the underlying formalism. While comp...
Circuit-Based Leakage-to-Erasure Conversion in a Neutral-Atom Quantum Processor
Matthew N. H. Chow, Vikas Buchemmavari, Sivaprasad Omanakuttan +4 more·May 16, 2024
Atom-loss errors are a major limitation of current state-of-the-art neutral-atom quantum computers and pose a significant challenge for scalable systems. In a quantum processor with cesium atoms, we demonstrate proof-of-principle circuit-based conver...
Silicon nitride integrated photonics from visible to mid-infrared spectra
K. Buzaverov, A. Baburin, Evgeny V. Sergeev +15 more·May 16, 2024
Recently, silicon nitride (Si3N4) photonic integrated circuits (PICs) are of a great interest due to their extremely low waveguides losses. The number of Si3N4 integrated photonics platform applications is constantly growing including the Internet of...
Architectures and random properties of symplectic quantum circuits
Diego Garc'ia-Mart'in, Paolo Braccia, M. Cerezo·May 16, 2024
Parametrized and random unitary (or orthogonal) n-qubit circuits play a central role in quantum information. As such, one could naturally assume that circuits implementing symplectic transformations would attract similar attention. However, this is n...
Computable Entanglement Cost under Positive Partial Transpose Operations.
Ludovico Lami, Francesco Anna Mele, Bartosz Regula·May 15, 2024
Quantum information theory is plagued by the problem of regularizations, which require the evaluation of formidable asymptotic quantities. This makes it computationally intractable to gain a precise quantitative understanding of the ultimate efficien...
Finite-size catalysis in quantum resource theories
Patryk Lipka-Bartosik, Kamil Korzekwa·May 14, 2024
Quantum catalysis, the ability to enable previously impossible transformations by using auxiliary systems without degrading them, has emerged as a powerful tool in various resource theories. Although catalytically enabled state transformations have b...
Simulating Floquet scrambling circuits on trapped-ion quantum computers
K. Seki, Yuta Kikuchi, Tomoya Hayata +1 more·May 13, 2024
Complex quantum many-body dynamics spread initially localized quantum information across the entire system. Information scrambling refers to such a process whose simulation is one of the promising applications of quantum computing. We demonstrate the...
High quality Ge layers for Ge/SiGe quantum well heterostructures using chemical vapor deposition
A. Nigro, Eric Jutzi, Nicolas Forrer +3 more·May 13, 2024
A great deal of interest is directed nowadays towards the development of innovative technologies in the field of quantum information and quantum computing, with emphasis on obtaining reliable qubits as building blocks. The realization of highly stabl...
ZX graphical calculus for continuous-variable quantum processes
Hironari Nagayoshi, W. Asavanant, Ryuhoh Ide +5 more·May 12, 2024
Continuous-variable (CV) quantum information processing is a promising candidate for large-scale fault-tolerant quantum computation. However, analysis of CV quantum process relies mostly on direct computation of the evolution of operators in the Heis...
Separable Power of Classical and Quantum Learning Protocols Through the Lens of No-Free-Lunch Theorem
Xinbiao Wang, Yuxuan Du, Kecheng Liu +3 more·May 12, 2024
The No-Free-Lunch (NFL) theorem, which quantifies problem- and data-independent generalization errors regardless of the optimization process, provides a foundational framework for comprehending diverse learning protocols' potential. Despite its signi...
Explicit decoders using fixed-point amplitude amplification based on QSVT
Takeru Utsumi, Yoshifumi Nakata·May 9, 2024
Reliably transmitting quantum information via a noisy quantum channel is a central challenge in quantum information science. While constructing a decoder is crucial to this goal, little was known about quantum circuit implementations of decoders that...
Quantum Resource Theories beyond Convexity
Roberto Salazar, Jakub Czartowski, Ricard Ravell Rodríguez +3 more·May 9, 2024
A class of quantum resource theories, based on non-convex star-shape sets, presented in this work captures the key quantum properties that cannot be studied by standard convex theories. We provide operational interpretations for a resource of this cl...
Wave Function Collapse, Lorentz Invariance, and the Third Postulate of Relativity
Edward J. Gillis·May 8, 2024
The changes that quantum states undergo during measurement are both probabilistic and nonlocal. These two characteristics complement one another to insure compatibility with relativity and maintain conservation laws. The probabilistic nature of nonlo...
Optical single-shot readout of spin qubits in silicon
A. Gritsch, A. Ulanowski, Jakob Pforr +1 more·May 8, 2024
Small registers of spin qubits in silicon can exhibit hour-long coherence times and exceeded error-correction thresholds. However, their connection to larger quantum processors is an outstanding challenge. To this end, spin qubits with optical interf...
Hybrid Quantum Graph Neural Network for Molecular Property Prediction
Michael Vitz, Hamed Mohammadbagherpoor, S. Sandeep +3 more·May 8, 2024
To accelerate the process of materials design, materials science has increasingly used data driven techniques to extract information from collected data. Specially, machine learning (ML) algorithms, which span the ML discipline, have demonstrated abi...
Quantum-inspired clustering with light
Miguel Varga, Pablo Bermejo, Ruben Pellicer-Guridi +2 more·May 7, 2024
This article introduces a novel approach to perform the simulation of a single qubit quantum-inspired algorithm using laser beams. Leveraging the polarization states of photonic qubits, and inspired by variational quantum eigensolvers, we develop a v...