Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Molecular Electron Transfer in Optical Cavities: From Excitonic to Vibronic Polaritons
Takumi Hidaka, Tomohiro Fukushima, Nguyen Thanh Phuc·Feb 27, 2026
Strong coupling between molecular excitations and quantized electromagnetic fields in optical cavities provides a powerful means to control the physical and chemical properties of molecular systems. Here, we study electron transfer (ET) dynamics in c...
On Emergences of Non-Classical Statistical Characteristics in Classical Neural Networks
Hanyu Zhao, Yang Wu, Yuexian Hou·Feb 27, 2026
Inspired by measurement incompatibility and Bell-family inequalities in quantum mechanics, we propose the Non-Classical Network (NCnet), a simple classical neural architecture that stably exhibits non-classical statistical behaviors under typical and...
Teleportation via spin-1/2 chain in solid-state quantum architecture
E. B. Fel'dman, S. I. Doronin, E. I. Kuznetsova +1 more·Feb 27, 2026
We propose the protocol for preparing the maximally entangled Bell state between remote qubits at the ends of the spin-1/2 chain governed by the specially engineered nearest-neighbor XX-Hamiltonian with excited central spin as the initial state. This...
Real-time Amplitude and Phase Estimation of AC Fields with Diamond Spins
Christopher T. -K. Lew, Samuel A. Wilkinson, Nicholas Gillespie +3 more·Feb 27, 2026
Nitrogen-vacancy centers in diamond have been shown to be capable of detecting AC magnetic fields with high sensitivity, spectral resolution, and spatial resolution. However, most studies so far have focused on the regime of time-averaged or time-cor...
Stabilizer Rényi entropy of 3-uniform hypergraph states
Daichi Kagamihara, Shunji Tsuchiya·Feb 27, 2026
Nonstabilizerness, also known as magic, plays a central role in universal quantum computation. Hypergraph states are nonstabilizer generalizations of graph states and constitute a key class of quantum states in various areas of quantum physics, such ...
Harmonic sequence state-preparation
Benjamin Rempfer, Parker Kuklinski, Justin Elenewski +1 more·Feb 27, 2026
We demonstrate an efficient circuit to prepare a quantum state with amplitudes proportional to a harmonic sequence. We do this by first preparing a large quantum state with linearly related amplitudes and then applying a quantum Fourier transform; th...
Perfect transmission of a Dirac particle in one-dimension double square barrier
Xu Zhang, Qiang Gu·Feb 27, 2026
Dirac particles can undergo perfect transmission through a sufficiently high potential barrier in the Klein zone. Although the perfect Klein tunneling (often referred to as the Klein paradox) is similar to the non-relativistic resonant transmission w...
From quantum time to manifestly covariant QFT: On the need for a quantum-action-based quantization
N. L. Diaz·Feb 27, 2026
In quantum time (QT) schemes, time is promoted to a degree of freedom, allowing Lorentz covariance to be made explicit for single particles. We ask whether this can be lifted to QFT, so that Lorentz covariance becomes manifest at the Hilbert-space le...
Second-quantized approach to the study of Halperin state in fractional quantum Hall effect
Li Chen, Zhiping Yao·Feb 27, 2026
We give a recursion relation for the second-quantized fermionic (bosonic) Halperin state, which avoids exact diagonalization of its two-component first-quantized parent Hamiltonian. We validate this formula by proving that the second-quantized Halper...
Rate-Dependent Internal Energy from Detailed-Balance Relaxation
Hyeong-Chan Kim, Youngone Lee·Feb 27, 2026
Thermalization in driven open quantum systems is often described as ordinary thermodynamics supplemented by additional dissipation that depends on how the system is driven. We show that when relaxation is treated consistently at the generator level w...
CLOAQ: Combined Logic and Angle Obfuscation for Quantum Circuits
Vincent Langford, Shihan Zhao, Hongyu Zhang +4 more·Feb 27, 2026
In the realm of quantum computing, quantum circuits serve as essential depictions of quantum algorithms, which are then compiled into executable operations for quantum computations. Quantum compilers are responsible for converting these algorithmic q...
Tensor Hypercontraction Error Correction Using Regression
Ishna Satyarth, Eric C. Larson, D. Matthews·Feb 27, 2026
Wavefunction‐based quantum methods are some of the most accurate tools for predicting and analyzing the electronic structure of molecules, in particular for accounting for dynamical electron correlation. However, most methods of including dynamical c...
High-Temporal-Resolution Measurements of the Impacts of Ionizing Radiation on Superconducting Qubits
Jihee Yang, Thomas J. Carroll, Philip Mason +19 more·Feb 26, 2026
We measure the effect of ionizing radiation on superconducting qubits with a timing resolution of 1 $μs$ using microwave kinetic inductance detectors (MKIDs) fabricated on the same substrate. We observe no correlation between two-level system (TLS) s...
Eve's forgery probability from her false acceptance probability: interactive authentication, Holevo information and the min-entropy
Pete Rigas·Feb 26, 2026
We obtain estimates for Eve's forgery probability, namely the probability that she is able to forge a message which Alice or Bob mistakenly accept over a noisy Quantum channel for generating a shared Quantum secret key. This probability is related to...
Continuous variable quantum key distribution channel emulator for the SPOQC mission
Emma Tien Hwai Medlock, Vinod N. Rao, Ry Render +2 more·Feb 26, 2026
In a free space optical (FSO) communication link from satellite to ground, the losses in the channel will be dynamic. Thus, the characterization of the FSO channel is of great importance and this can be emulated in the lab to evaluate the realistic p...
Machine learning of quantum data using optimal similarity measurements
Zhenghao Li, Hao Zhan, Shana H. Winston +11 more·Feb 26, 2026
Quantum machine learning seeks a computational advantage in data processing by evaluating functions of quantum states, such as their similarity, that can be classically intractable to compute. For quantum advantage to be possible, however, it is esse...
Trajectory of Probabilities, Probability on Trajectories, and the Stochastic-Quantum Correspondence
Győző Egri, Marton Gomori, Balazs Gyenis +1 more·Feb 26, 2026
The probabilistic description of the time evolution of a physical system can take two conceptually distinct forms: a trajectory of probabilities, which specifies how probabilities evolve over time, and a probability on trajectories, which assigns pro...
Ground state and persistent oscillations in the quantum East model
Adway Kumar Das, Achilleas Lazarides·Feb 26, 2026
For the 1D quantum East model with open boundaries, we show that in the limit $s \to -\infty$, the ground state is accurately captured by a simple spin-coherent product state. We further identify a low-entanglement excited eigenstate that differs fro...
Integrability breaking in semiclassical strings in Koopman-Krylov space
Rathindra Nath Das, Saskia Demulder·Feb 26, 2026
While very powerful, integrability in semiclassical string solutions is known to be a rare property. Motivated by the need to understand and characterise the large landscape of non-integrable string dynamics, we extend Krylov methods for probing chao...
From QED$_3$ to Self-Dual Multicriticality in the Fradkin-Shenker Model
Thomas T. Dumitrescu, Pierluigi Niro, Ryan Thorngren·Feb 26, 2026
We consider the Fradkin-Shenker ${\mathbb Z}_2$ gauge-Higgs lattice model in 2+1 dimensions, i.e. the toric code deformed by an in-plane magnetic field. Its phase diagram contains a multicritical CFT with gapless, mutually non-local electric and magn...