Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Majorana physics in a Luttinger liquid with attractive interactions
Francesco Debortoli, Nitya Cuzzuol, Luca Barbiero +1 more·Jul 7, 2026
Majorana zero modes are the hallmark of topological superconductivity. In one-dimensional systems, these zero modes are usually introduced in the context of gapped, mean-field models that do not conserve particle number, such as the Kitaev chain. By ...
Quantum error correction of a grid-state qubit with state preparation and measurement errors below $10^{-3}$
Sara Turcotte, Lucas St-Jean, Amélie L. Pessonneaux +10 more·Jul 7, 2026
Grid state qubits offer a hardware-efficient approach to large-scale fault-tolerant quantum computing. They access the information redundancy required for quantum error correction by exploiting the large Hilbert space naturally available in harmonic ...
Mesoscopic routers and single-pole double-throw switches for electronic heat
José Balduque, Rafael Sánchez·Jul 7, 2026
The unavoidable dissipation of heat in electronic nanostructures is a crucial problem, specially when their operation requires low temperatures. It demands finding devices able to control and redirect the excess heat, ideally without perturbing the e...
Local Markov Order and Global Inference in Many-Body Dynamics
Thomas Iadecola·Jul 7, 2026
We consider how the presence of conserved charges affects memory in a classical stochastic process, the symmetric exclusion process, with an observer constantly measuring a single site. We find that the observer's measurement record becomes Markovian...
Universal purification dynamics of monitored Clifford circuits
Beatrice Magni, Federico Gerbino, Xhek Turkeshi +1 more·Jul 7, 2026
Quantum circuits under sufficiently weak monitoring purify on a timescale $T_P$ exponentially long in the system size. This slowness underlies a universal purification dynamics, whose quantitative description has so far required the replica trick, wi...
Semi-Device-Independent Quantum Key Distribution from Operational Assumptions
Anubhav Chaturvedi, Giuseppe Viola, Ekta Panwar +2 more·Jul 7, 2026
Semi-device-independent quantum key distribution leaves the measurement devices uncharacterized while placing a trusted assumption on Alice's source. We formulate this source assumption operationally on Alice's four-preparation ensemble as a scalar b...
Digital Fragmentation and Generative AI Use Across 103 Million Application Events
Sumer S. Vaid, Ashley V. Whillans·Jul 7, 2026
Knowledge workers switch between applications thousands of times per day, spending nearly a tenth of the work year transitioning between digital applications in a process called digital fragmentation. Whether this fragmentation reflects who an employ...
Spectral Born machines: classically trainable quantum generative models for discrete data
Austin Huang, William Maxwell, Vasilis Belis +4 more·Jul 7, 2026
We present \emph{spectral Born machines}, a class of quantum generative models that results from viewing and generalizing the class of IQP Born machines through the lens of group Fourier analysis. These quantum models exploit the quantum Fourier tran...
Localized Thermometry via Dayem Bridges Integrated on Superconducting Qubit Chips
Ella O. Lachman, Dave P. Pappas, Jayss Marshall +1 more·Jul 7, 2026
Accurate knowledge of the on-chip temperature is essential for understanding and optimizing the performance of superconducting qubits, yet direct thermometry at millikelvin temperatures remains challenging. While qubits themselves are sensitive to th...
Spin singlets are useful
Silas Hoffman, Edward H. Chen, Matthew Brooks +6 more·Jul 7, 2026
We evaluate the utility of the spin-zero manifold of an exchange-coupled array of $N$ spins for tasks in quantum computation and quantum simulation. Since pairs of electrons can be readily initialized into a product state of singlets in semiconductin...
Quantum Channel Polynomial Processing
Tianhan Liu, Fedor Simkovic, Martin Leib·Jul 7, 2026
We introduce a quantum algorithmic framework based on probabilistic mixtures of unitary channels that, similar to the framework of quantum singular value transformations, enables the application of arbitrary polynomials of hermitian operators onto ar...
Continuous Narrow-Linewidth Superradiance in Waveguide QED
Anna Bychek, Martin Fasser, Ivan Vybornyi +4 more·Jul 7, 2026
Superradiant lasers promise continuous, narrow-linewidth coherent emission at the bare atomic transition frequency, enabling frequency references of exceptional precision. Recent experiments have advanced the field, but achieving truly continuous ope...
Localized control of large ion crystals in a Penning trap using a spatial light modulator
Allison L. Carter, Jennifer F. Lilieholm, Bryce B. Bullock +3 more·Jul 7, 2026
Penning ion traps as quantum platforms have primarily utilized global control and symmetric Dicke states for quantum simulation and sensing experiments. The introduction of local control greatly increases the power of the platform as a quantum simula...
Quantum state localization in dipole-dipole interacting disordered networks
Pritam Chattopadhyay, Saikat Sur, Avijit Misra +3 more·Jul 7, 2026
We study the localization of excitations in positionally disordered spin or atom networks coupled via the realistic resonant dipole-dipole interaction (RDDI), which does not conform to a simple power law, as the spatial dependence and dissipative cha...
Differentially private quantum sensor networks
Daniel J. Spencer, Kaiyan Shi, Emil T. Khabiboulline +2 more·Jul 7, 2026
Quantum sensing is a promising technology capable of demonstrating clear advantage over comparable classical techniques for precise measurement. One application of quantum sensing is in function estimation, which can be done using a network of entang...
Leveraging Metrologically Useful States in Quantum Reservoir Networks
Erik L. Connerty, Margarite LaBorde, Ethan N. Evans·Jul 7, 2026
Interest in using quantum computers for the purpose of predicting chaotic partial differential equations (PDEs) has been growing with the advent of newer low-error quantum computers and robust simulation tools. In this paper, we present a method that...
Design and Benchmarking of a Quantum Photonic Chip
Gabriele De Angelis, Nicolò Leone, Alessandro Luongo +7 more·Jul 7, 2026
We present the design and benchmarking of RP000, a quantum photonic processor capable of encoding a quantum system in the degrees of freedom of single photons, based on standard CMOS-compatible manufacturing processes, and working at room temperature...
Typical Entanglement of Superpositions
Damien Quinn, Joshuah T. Heath, Graham Kells·Jul 7, 2026
We investigate universal entanglement properties inherent to superpositions of randomized states. We find that an $m$-fold superposition of typical states may be classified into two distinct entanglement classes via the 2nd Rényi entropy density $s_2...
Provable learning separation for predicting time-evolution of quantum many-body systems
Rahul Bandyopadhyay, Riccardo Molteni, Jens Eisert +2 more·Jul 7, 2026
Given that quantum computers are naturally suited to simulate the behavior of quantum many-body systems, an immediate question arises: can one formulate physically motivated quantum machine learning (QML) tasks that exhibit learning separations? We a...
Unbiased Estimation of Conditional Covariance for Quantum Optomechanics
Katsuta Sakai, Nobuyuki Matsumoto·Jul 7, 2026
Continuous measurements can prepare macroscopic mechanical oscillators in conditional quantum states, but their covariance is difficult to verify. The conventional retrodictive estimator assumes a forward--backward covariance symmetry and can be bias...