Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Dawn and Twilight Time in Quantum Tunneling
Tinglong Feng, Jesse Moes, Tomislav Prokopec·Dec 16, 2025
Metastable decay exhibits a familiar exponential regime bracketed by early-time deviations and late-time power-law tails. We adopt the real-time, flux-based definition of the decay rate in the spirit of Andreassen et al.\ direct method and present a ...
Testing electron-photon exchange-correlation functional performance for many-electron systems under weak and strong light-matter coupling
Iman Ahmadabadi, I-Te Lu, Leonardo A. Cunha +3 more·Dec 16, 2025
We present results of a photon-free exchange-correlation functional within the local density approximation (pxcLDA) for quantum electrodynamics density functional theory (QEDFT) that efficiently describes the electron density of many-electron systems...
Improved Lower Bounds for QAC0
Malvika Raj Joshi, Avishay Tal, Francisca Vasconcelos +1 more·Dec 16, 2025
In this work, we prove the strongest known lower bounds for QAC$^0$, allowing polynomially many gates and ancillae. Our main results show that: (1) Depth-3 QAC$^0$ circuits cannot compute PARITY, and require $Ω(\exp(\sqrt{n}))$ gates to compute MAJOR...
Localization from Infinitesimal Kinetic Grading: Finite-size Scaling, Kibble-Zurek Dynamics and Applications in Sensing
Argha Debnath, Ayan Sahoo, Debraj Rakshit·Dec 16, 2025
We study a one-dimensional lattice model with site-dependent nearest-neighbor hopping amplitudes that follow a power-law profile. The hopping variation is controlled by a grading exponent, $|alpha|$, which serves as the tuning parameter of the system...
Sequential realization of Quantum Instruments
Soham Sau, Michal Sedlák·Dec 16, 2025
In adaptive quantum circuits classical results of mid-circuit measurements determine the upcoming gates. This allows POVMs, quantum channels or more generally quantum instruments to be implemented sequentially, so that fewer qubits need to be used at...
Microwave control of photonic spin Hall effect in atomic system
Muhammad Waseem·Dec 16, 2025
The photonic Spin Hall Effect (SHE) causes a polarization-dependent transverse shift of light at an interface. There is a significant research interest in controlling and enhancing the photonic SHE. In this paper, we theoretically investigate the mic...
Reading Qubits with Sequential Weak Measurements: Limits of Information Extraction
Cesar Lema, Aleix Bou-Comas, Atithi Acharya +2 more·Dec 16, 2025
Quantum information processing and computation requires high accuracy qubit configuration readout. In many practical schemes, the initial qubit configuration has to be inferred from readout that is a time-dependent weak measurement record. However, a...
Exploiting Reset Operations in Cloud-based Quantum Computers to Run Quantum Circuits for Free
Jakub Szefer·Dec 16, 2025
This work presents the first thorough exploration of how reset operations in cloud-based quantum computers could be exploited to run quantum circuits for free. This forms a new type of attack on the economics of cloud-based quantum computers. All maj...
Entanglement measure for the W-class states
Reza Hamzehofi·Dec 16, 2025
The structure and quantification of entanglement in the W-class states are investigated under physically motivated transformations that induce mixed-state dynamics. A rigorous condition is established linking global separability to the behavior of pa...
Fair sampling of ground-state configurations using hybrid quantum-classical MCMC algorithms
Yuichiro Nakano, Keisuke Fujii·Dec 16, 2025
We study the fair sampling properties of hybrid quantum-classical Markov chain Monte Carlo (MCMC) algorithms for combinatorial optimization problems with degenerate ground states. While quantum optimization heuristics such as quantum annealing and th...
Physics-Informed Neural Networks with Adaptive Constraints for Multi-Qubit Quantum Tomography
Changchun Feng, Laifa Tao, Lin Chen·Dec 16, 2025
Quantum state tomography (QST) faces exponential measurement requirements and noise sensitivity in multi-qubit systems, bottlenecking practical quantum technologies. We present a physics-informed neural network (PINN) framework integrating quantum me...
A Graph-Based Forensic Framework for Inferring Hardware Noise of Cloud Quantum Backend
Subrata Das, Archisman Ghosh, Swaroop Ghosh·Dec 16, 2025
Cloud quantum platforms give users access to many backends with different qubit technologies, coupling layouts, and noise levels. The execution of a circuit, however, depends on internal allocation and routing policies that are not observable to the ...
Continuous Accumulation of Cold Atoms in an Optical Cavity
Edward Gheorghita, Sebastian Wald, Andrea Pupić +1 more·Dec 16, 2025
Continuously operating atom-light interfaces represent a key prerequisite for steady-state quantum sensors and efficient quantum processors. Here, we demonstrate continuous accumulation of sub-Doppler-cooled atoms in a shallow intracavity dipole trap...
Finite-Time Protocols Stabilize Charging in Noisy Ising Quantum Batteries
Riccardo Grazi, Henrik Johannesson, Dario Ferraro +1 more·Dec 16, 2025
Reliable charging protocols are crucial for advancing quantum batteries toward practical use. We investigate a transverse-field Ising chain as a quantum battery, focusing on the combined role of qubit interactions in the battery model and finite char...
Large circuit execution for NMR spectroscopy simulation on NISQ quantum hardware
Artemiy Burov, Julien Baglio, Clément Javerzac-Galy·Dec 16, 2025
With the latest advances in quantum computing technology, we are gradually moving from the noisy intermediate-scale quantum (NISQ) era characterized by hardware limited in the number of qubits and plagued with quantum noise, to the age of quantum uti...
From few- to many-body physics: Strongly dipolar molecular Bose-Einstein condensates and quantum fluids
Andreas Schindewolf, Jens Hertkorn, Ian Stevenson +8 more·Dec 16, 2025
Recent advances in molecular cooling have enabled the realization of strongly dipolar Bose-Einstein condensates (BECs) of molecules, and BECs of many different molecular species may become experimentally accessible in the near future. Here, we explor...
Nonlocal contributions to ergotropy: A thermodynamic perspective
B. Vigneshwar, R. Sankaranarayanan·Dec 16, 2025
Nonlocality is a defining feature of quantum mechanics and has long served as a key indicator of quantum resources since the formulation of Bell's inequalities. Identifying the contribution of nonlocality to extractable work remains a central problem...
Multimode Jahn-Teller Effect in Negatively Charged Nitrogen-Vacancy Center in Diamond
Jianhua Zhang, Jun Liu, Z. Z. Zhu +3 more·Dec 16, 2025
We present a first-principles study of the multimode Jahn-Teller (JT) effect in the exctied $^{3}E$ state of the negatively charged nitrogen-vacancy (NV) center in diamond. Using density functional theory combined with an intrinsic distortion path (I...
Graphene-Insulator-Superconductor junctions as thermoelectric bolometers
Leonardo Lucchesi, Federico Paolucci·Dec 16, 2025
We design a superconducting thermoelectric bolometer made of a Graphene-Insulator-Superconductor tunnel junction. Our detector has the advantage of being passive, as it directly transduces input power to a voltage without the need to modulate an exte...
A Compact Incubation Platform for Long-Term Cultivation of Biological Samples for Nitrogen-Vacancy Center Widefield Microscopy
A. Pointner, D. Thalheim, S. Belasi +7 more·Dec 16, 2025
Nitrogen-vacancy (NV) centers in diamond provide a versatile quantum sensing platform for biological imaging through magnetic field detection, offering unlimited photostability and the ability to perform long-term observations without photobleaching ...