Papers
Enhancing Spin Coherence of Optically-Addressed Molecular Qubit by Nuclear Spin Hyperpolarization
Boning Li, Patrick Hautle, Duhan Zhang +6 more·Mar 29, 2026
Optically addressable molecular triplet spins provide a chemically tunable platform for quantum application, but their coherence is often limited by interactions with surrounding spin baths. Here we demonstrate controlled suppression of nuclear-bath-...
HAMMR-L: Noise Reduction in Quantum Outcomes Using a Richardson-Lucy Deconvolution Algorithm for Quantum State Graphs
Jake Scally, Austin Myers, Ryan Carmichael +2 more·Mar 29, 2026
Current quantum computers present significant noise, especially as circuit depth and qubit count increase. Prior work has demonstrated that erroneous outcomes exhibit some behavior in Hamming space, enabling improvements in the output distributions o...
First order Maxwell operator formalism for macroscopic quantum electrodynamics
Ishita Agarwal, Ankit Kundu, Christian M. Lange +1 more·Mar 29, 2026
Standard macroscopic QED is built on the second-order Green's function for the electric field and discards open-system boundary terms. Here we develop a first-order electromagnetic operator approach that retains both $\mathbf{E}$ and $\mathbf{H}$ and...
Differential source-basis encoding for superresolved parameter estimation in a time-reversed Young interferometer
Jianming Wen·Mar 28, 2026
We develop a differential source-encoding protocol for local parameter estimation in a time-reversed Young interferometer, where the source plane is used not merely as a scan coordinate but as a programmable measurement basis. Two sequential positive...
Time of arrival on a ring and relativistic quantum clocks
Iason Vakondios, Charis Anastopoulos·Mar 28, 2026
We study the time-of-arrival problem for relativistic particles constrained to move on a ring, formulating the problem entirely within Quantum Field Theory (QFT). In contrast to its counterpart for motion in a line, the circle topology implies that p...
NNQA: Neural-Native Quantum Arithmetic for End-to-End Polynomial Synthesis
Ziqing Guo, Jie Li, Yong Chen +1 more·Mar 28, 2026
Hybrid classical quantum learning is often bottlenecked by communication overhead and approximation error from generic variational ansatzes. In this study, we introduce Neural Native Quantum Arithmetic (NNQA), which compiles classically learned nonli...
Quantum Bit Error Rate Analysis in BB84 Quantum Key Distribution: Measurement, Statistical Estimation, and Eavesdropping Detection
Jaydeep Rath, Prajwal Panth, P. S. N. Bhaskar·Mar 28, 2026
Quantum Key Distribution (QKD) provides information-theoretic security by exploiting the principles of quantum mechanics. Among QKD protocols, the BB84 scheme remains the most widely adopted for both theoretical research and practical implementation....
Nonunitary Preparation of Nontrivial States from Trivial Regimes in Two-Dimensional Topological Insulators
Qin-Qin Wang, Xiao-Ye Xu, Chuan-Feng Li +1 more·Mar 27, 2026
While remarkable progress has been achieved in engineering nontrivial Hamiltonians across a wide range of physical platforms, preparing their corresponding nontrivial ground states remains a major experimental challenge. The commonly used strategy fo...
Hyperbolic Cluster States for Fault-Tolerant Measurement-Based Quantum Computing
Ahmed Adel Mahmoud, Gabrielle Tournaire, Sven Bachmann +1 more·Mar 27, 2026
Fault-tolerant measurement-based quantum computing (MBQC) provides a compelling framework for fault-tolerant quantum computation, in which quantum information is processed through single-qubit measurements on a three-dimensional entangled resource kn...
Autonomous Hamiltonian certification and changepoint detection
Steven T. Flammia, Dmitrii Khitrin, Muzhou Ma +3 more·Mar 27, 2026
Modern quantum devices require high-precision Hamiltonian dynamics, but environmental noise can cause calibrated Hamiltonian parameters to drift over time, necessitating expensive recalibration. Detecting when recalibration is needed is challenging, ...
Entanglement as Memory: Mechanistic Interpretability of Quantum Language Models
Nathan Roll·Mar 27, 2026
Quantum language models have shown competitive performance on sequential tasks, yet whether trained quantum circuits exploit genuinely quantum resources -- or merely embed classical computation in quantum hardware -- remains unknown. Prior work has e...
Low-energy spectrum of double-junction superconducting circuits in the Born-Oppenheimer approximation
Leo Uhre Jakobsen, Ksenia Shagalov, David Feldstein-Bofill +3 more·Mar 27, 2026
The superconductor-insulator-superconductor Josephson junction is the fundamental nonlinear element of superconducting circuits. Connecting two junctions in series gives rise to higher-harmonic content in the total energy-phase relation, enabling new...
STN-GPR: A Singularity Tensor Network Framework for Efficient Option Pricing
Dominic Gribben, Carolina Allende, Alba Villarino +5 more·Mar 27, 2026
We develop a tensor-network surrogate for option pricing, targeting large-scale portfolio revaluation problems arising in market risk management (e.g., VaR and Expected Shortfall computations). The method involves representing high-dimensional price ...
Noise modelling of waveguide based squeezed light sources
Erik Anders Torsten Svanberg, Daniel Voigt, Vaishali Adya·Mar 27, 2026
Squeezed states of light are used for precision metrology and quantum-enhanced measurements, with applications spanning communication and sensing. State-of-the-art squeezed-light sources typically rely on optical cavities to achieve high, usable leve...
Minimal noise in non-quantized gravity
Giuseppe Fabiano, Tomohiro Fujita, Akira Matsumura +1 more·Mar 27, 2026
An elementary prediction of the quantization of the gravitational field is that the Newtonian interaction can entangle pairs of massive objects. Conversely, in models of gravity in which the field is not quantized, the gravitational interaction neces...
MoSAIC: Scalable Probabilistic Error Cancellation via Variational Blockwise Noise Aggregation
Maya Ma, Rimika Jaiswal, Murphy Yuezhen Niu·Mar 27, 2026
Quantum error mitigation is essential for extracting trustworthy results from noisy intermediate-scale quantum (NISQ) processors. Yet, current approaches face a core scalability bottleneck: unbiased methods such as probabilistic error cancellation (P...
Approximate Error Correction for Quantum Simulations of SU(2) Lattice Gauge Theories
Zachary P. Bradshaw·Mar 26, 2026
We present a protocol for actively suppressing Gauss law violations in quantum simulations of SU(2) lattice gauge theory. The protocol uses mid-circuit measurements to extract a characterization of the gauge-violation sector at each lattice vertex, r...
Closed-Form Formulas for Designing Ultra-Low Phase-Noise Cross-Coupled Dynamically Body-Biased Only-NMOS LCVCOs
Naser Khatti Dizabadi, Peter LoPresti·Mar 26, 2026
This paper presents a system-level analytical framework for modeling and minimizing phase noise in body-biased cross-coupled LC-tank voltage-controlled oscillators (LC-VCOs). Building upon Impulse Sensitivity Function (ISF) theory, the impulse sensit...
Ultrabroadband Passive Laser Noise Suppression to Quantum Noise Limit through on-chip Second Harmonic Generation
Geun Ho Ahn, Ziyu Wang, Devin J. Dean +5 more·Mar 26, 2026
Laser intensity noise limits performance in quantum sensing, metrology, and computing. Existing stabilization methods face a trade-off between bandwidth and complexity: electronic feedback loops are speed-limited, while optical resonators are constra...
Stochastic Multipath Routing for High-Throughput Entanglement Distribution in Quantum Repeater Networks
Ankit Mishra, Kang Hao Cheong·Mar 26, 2026
Quantum repeater networks distribute entanglement over lossy links while many users share a limited pool of entangled pairs. Most existing routing schemes either always use a single best path or rely on global optimizations that are hard to run in re...