Papers
Live trends in quantum computing research, updated daily from arXiv.
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28,250
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22
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Research Volume
13,400 papers in 12 months (-22% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Probing Bandwidth and Sensitivity in Rydberg Atom Sensing via Optical Homodyne and RF Heterodyne Detection
Dixith Manchaiah, Stone Oliver, Samuel Berweger +2 more·Sep 25, 2025
Rydberg atom based sensors allow for SI traceable measurements and show promise for applications in the field of communication and radar technologies. In this article, we investigate the bandwidth and sensitivity of a Rydberg atom-based sensor in a r...
Quantum Simulation of Fermions in $AdS_2$ Black Hole: Chirality, Entanglement, and Spectral Crossovers
Kazuki Ikeda, Yaron Oz·Sep 25, 2025
We consider free Dirac fermions on a discretized $AdS_2$ black hole background, and analyze how curved space redshift, horizons, and the spin connection induced chiral gravitational effect shape spectral, transport, and scrambling phenomena. The syst...
Optimal phase change for a generalized Grover's algorithm
Christopher Cardullo, Min Kang·Sep 24, 2025
We study the generalized Grover's algorithm with an arbitrary amplitude vector to find the optimal phase change for maximizing the gain in probability for the target of each iteration. In the classic setting of Grover's algorithm with a real initial ...
Asymptotically optimal unitary estimation in $\mathrm{SU}(3)$ by the analysis of graph Laplacian
Satoshi Yoshida, Hironobu Yoshida, Mio Murao·Sep 24, 2025
Unitary estimation is the task to estimate an unknown unitary operator $U\in\mathrm{SU}(d)$ with $n$ queries to the corresponding unitary operation, and its accuracy is evaluated by an estimation fidelity. We show that the optimal asymptotic fidelity...
Numerically exact quantum dynamics with tensor networks: Predicting the decoherence of interacting spin systems
Tianchu Li, Pranay Venkatesh, Nanako Shitara +1 more·Sep 24, 2025
Predicting the quantum dynamics of promising solid-state and molecular quantum technology candidates remains a formidable challenge. Yet, accessing these dynamics is key to understanding and controlling decoherence mechanisms -- a prerequisite for de...
Excited-CAFQA: A classical simulation bootstrap for the variational estimation of molecular excited states
Bikrant Bhattacharyya, Gokul Ravi·Sep 24, 2025
Variational Quantum Algorithms (VQAs) are iterative algorithms suited to implementation on current-era quantum devices. VQAs employ classical optimization to minimize cost functions evaluated on quantum circuits. However, the extent to which VQAs man...
Nonlocal Magic Generation and Information Scrambling in Noisy Clifford Circuits
Emanuel Dallas, Paolo Zanardi·Sep 24, 2025
In this work, we investigate the average information scrambling and nonlocal magic generation properties of random Clifford encoding-decoding circuits perturbed by local noise. We quantify these with the bipartite algebraic out-of-time order correlat...
(2+1)D Quantum Electrodynamics at Finite Density on a Quantum Computer
Emil Otis Rosanowski, Arianna Crippa, Lena Funcke +3 more·Sep 24, 2025
In this paper, we explore (2+1)D quantum electrodynamics (QED) at finite density on a quantum computer, including two fermion flavors. Our method employs an efficient gauge-invariant ansatz together with a quantum circuit structure that enforces Gaus...
Realization of Graphene Quantum Dots for Innovative Biosensor Development and Diverse Applications
Kumar Gautam, Kumar Shubham, Hitesh Sharma +5 more·Sep 24, 2025
This paper investigates quantum dots (QDs), which are miniature semiconductor structures with remarkable optical and electrical properties due to quantum confinement processes. Traditional QDs, such as CdTe, have been extensively investigated; howeve...
Quantum error correction beyond $SU(2)$: spin, bosonic, and permutation-invariant codes from convex geometry
Arda Aydin, Victor V. Albert, Alexander Barg·Sep 24, 2025
We develop a framework for constructing quantum error-correcting codes and logical gates for three types of spaces -- composite permutation-invariant spaces of many qubits or qudits, composite constant-excitation Fock-state spaces of many bosonic mod...
Towards a user-centric HPC-QC environment
Aleksander Wennersteen, Matthieu Moreau, Aurelien Nober +1 more·Sep 24, 2025
Robust execution environments are important for addressing key challenges in quantum computing, such as application development, portability, and reproducibility, and help unlock the development of modular quantum programs, driving forward hybrid qua...
Quantum statistical mechanical gauge invariance
Johanna Müller, Matthias Schmidt·Sep 24, 2025
We address gauge invariance in the statistical mechanics of quantum many-body systems. The gauge transformation acts on the position and momentum degrees of freedom and it is represented by a quantum shifting superoperator that maps quantum observabl...
Witnessing quantum non-Gaussianity from intensity moments
Éva Rácz, László Ruppert, Radim Filip·Sep 24, 2025
Direct measurement of quantum non-Gaussianity requires some variant of a discrete photon-resolving detection, which is feasible only for low mean photon numbers. For a large mean photon number, intensity detection by linear photodiodes provides a con...
Computational relative entropy
Johannes Jakob Meyer, Asad Raza, Jacopo Rizzo +3 more·Sep 24, 2025
Our capacity to process information depends on the computational power at our disposal. Information theory captures our ability to distinguish states or communicate messages when it is unconstrained with unrivaled beauty and elegance. For computation...
Symmetrized operators or modified integration measure in Generalized Uncertainty Principle Models
Michael Bishop, Daniel Hooker, Doug Singleton·Sep 24, 2025
Many Generalized Uncertainty Principle (GUP) models modify the inner-product measure to ensure symmetric position or momentum operators. We show that an alternate approach to these GUPs is to symmetrize the operators rather than modifying the inner p...
Superfluid-Mott transition in a frustrated triangular optical lattice
Mehedi Hasan, Luca Donini, Sompob Shanokprasith +7 more·Sep 24, 2025
Geometric frustration can significantly increase the complexity and richness of many-body physics and, for instance, suppress antiferromagnetic order in quantum magnets. Here, we employ ultracold bosonic $^{39}$K atoms in a triangular optical lattice...
Nonlocal Games in the High-Noise Regime: Optimal Quantum Values and Rigidity
Honghao Fu, Minglong Qin, Haochen Xu +1 more·Sep 24, 2025
Motivated by the limitations of near-term quantum devices, we study nonlocal games in the high-noise regime, where the two players may share arbitrarily many copies of a noisy entangled state. In this regime, existing rigidity theorems are unable to ...
Quantum speed limits based on Jensen-Shannon and Jeffreys divergences for general physical processes
Jucelino Ferreira de Sousa, Diego Paiva Pires·Sep 24, 2025
We discuss quantum speed limits (QSLs) for finite-dimensional quantum systems undergoing general physical processes. These QSLs were obtained using two families of entropic measures, namely the square root of the Jensen-Shannon divergence, which in t...
Fidelity zeros and Lee-Yang theory of quantum phase transitions
Tian-Yi Gu, Gaoyong Sun·Sep 24, 2025
Lee-Yang theory is central to the analysis of thermal phase transitions. However, the underlying mechanism of the theory and the nature of Lee-Yang zeros in quantum many-body systems remains elusive. Here, we develop a unified framework for understan...
A Quantum Algorithm For Computing Contextuality Bounds
Colm Kelleher, Frédéric Holweck·Sep 24, 2025
Quantum contextuality is a limitation on deterministic hidden variable models, testable in measurement scenarios where outcomes differ under quantum or classical descriptions due to a common set of constraints. When considering measurements of $N$-qu...