Papers
Using an SU(3)/U(2) Wigner Function to Represent Noisy Spin Ensembles
Andrew Kolmer Forbes·Mar 16, 2026
The SU(2) Wigner function represents a quantum state of a spin-$J$ as a real-valued function on the surface of a 2-sphere. For an ensemble of $N$ spin-1/2 particles, this representation is useful when the dynamics is restricted to a single SU(2) irre...
Asymptotically good bosonic Fock state codes: Exact and approximate
Dor Elimelech, Arda Aydin, Alexander Barg·Mar 16, 2026
We examine exact and approximate error correction for multi-mode Fock state codes protecting against the amplitude damping noise. Based on a new formalization of the truncated amplitude damping channel, we show the equivalence of exact and approximat...
Schrödinger-picture formulation of a scalar quantum field driven by white noise
Pei Wang·Mar 16, 2026
We develop a Schrödinger-picture formulation for a scalar quantum field driven by a Lorentz-invariant white-noise field. The quantum state of the system is described by a stochastic wave functional that evolves according to a stochastic Schrödinger e...
Photonic Quantum-Enhanced Knowledge Distillation
Kuan-Cheng Chen, Shang Yu, Chen-Yu Liu +10 more·Mar 16, 2026
Photonic quantum processors naturally produce intrinsically stochastic measurement outcomes, offering a hardware-native source of structured randomness that can be exploited during machine-learning training. Here we introduce Photonic Quantum-Enhance...
A Deep-Learning-Boosted Framework for Quantum Sensing with Nitrogen-Vacancy Centers in Diamond
Changyu Yao, Haochen Shen, Zhongyuan Liu +13 more·Mar 16, 2026
Nitrogen-vacancy (NV) centers in diamond are a versatile quantum sensing platform for high sensitivity measurements of magnetic fields, temperature and strain with nanoscale spatial resolution. A common bottleneck is the analysis of optically detecte...
Adaptive Control of Stochastic Error Accumulation in Fault-Tolerant Quantum Computation
Tirtha Haque·Mar 16, 2026
In realistic hardware for quantum computation that possesses fault-tolerance, non-stationary noise and stochastic drift lead to logical failure from the temporal accumulation of errors, not from independent events. Static decoding and fixed calibrati...
Computing logical error thresholds with the Pauli Frame Sparse Representation
Thomas Tuloup, Thomas Ayral·Mar 15, 2026
We introduce a sparse classical representation, a truncation strategy and a shot-efficient sampling method to push the classical prediction of quantum error correction thresholds beyond Clifford operations and Pauli errors. As two illustrations of th...
Evaluating Calibration-Based Digital Twins for IBM Quantum Hardware Simulation
Edgars Bautra, Maksims Dimitrijevs, Abuzer Yakaryilmaz·Mar 15, 2026
We evaluate calibration-based digital twins for IBM Quantum hardware, aiming to reproduce hardware measurement outcomes on classical simulators. We present a workflow that builds twins from downloadable calibration CSV files by mapping coherence time...
Quantum Enhanced Pauli Propagation
S. Majumder, J. R. Garrison, L. Luo +8 more·Mar 15, 2026
Accurately estimating observables on noisy quantum devices remains a central challenge for near-term quantum algorithms. While quantum error mitigation techniques can reduce noise-induced bias, they often rely on unverifiable assumptions about the ci...
Quantum-limited traveling-wave parametric amplifier based on DUV lithography-defined planar structures
Hao Li, Marco Scigliuzzo, Evgenii Guzovskii +3 more·Mar 15, 2026
The relentless scaling of classical microelectronics has been enabled by the precision and reproducibility of deep-ultraviolet (DUV) optical lithography. Implementing large-scale superconducting quantum processors will require cryogenic microwave com...
Fast Single Nitrogen-Vacancy Center Ramsey Characterization using a Physics-Informed Neural Network
Chao Shang, Gregory D. Fuchs·Mar 14, 2026
Precise characterization of the local spin environment of single diamond nitrogen-vacancy (NV) centers is crucial for advancing quantum sensing, quantum networking, and the optimization of quantum materials. However, single NV center fluorescence mea...
Folding-Free Zero-Noise Extrapolation by Layout-induced Noise Diversity
Debarthi Pal, Yogesh Simmhan·Mar 14, 2026
Near term quantum processors operate in a noise dominated regime, motivating error mitigation techniques that recover accurate expectation values without full fault tolerance. Zero Noise Extrapolation (ZNE) is a widely used but biased error mitigatio...
A Highly Sensitive Diamond NV Magnetometer Using Ramsey Interferometry with a Short Sensor-to-Sample Distance
Yuta Araki, Takeharu Sekiguchi, Yuji Hatano +11 more·Mar 14, 2026
In this study, we developed a diamond quantum magnetometer based on Ramsey interferometry with a short sensor-to-sample distance. Conventional biomagnetic sensors with ensemble nitrogen-vacancy centers using continuous-wave optically detected magneti...
Directly estimating the fidelity of measurement-based quantum computation
David T. Stephen, Michael Foss-Feig·Mar 14, 2026
In measurement-based quantum computation (MBQC), quantum circuits are implemented using adaptive measurements on an entangled resource state. In practice, the resource state will always be prepared with some noise, and it is crucial to understand the...
Quantum dial
Aashish Sah, Suman Kundu, Priyank Singh +3 more·Mar 13, 2026
Accurate control of quantum degrees of freedom is promising for sensing, communication, and computing, but building a useful quantum computer faces a central isolation-and-control challenge: qubits must remain well isolated from their environment to ...
Residual quantum correlations and non-Markovian noise
Hermann L. Albrecht, David M. Bellorin·Mar 13, 2026
Wu et al. introduced residual quantum correlations (RQC) in 2015 and defined them in terms of two complementary bases. Given a measure for classical correlations, its optimization defines a local basis. Relative to this local basis, one defines a new...
Resource-Optimal Importance Sampling for Randomized Quantum Algorithms
Davide Cugini, Touheed Anwar Atif, Yigit Subasi·Mar 13, 2026
Randomized protocols are procedures that incorporate probabilistic choices during their execution and they play a central role in quantum algorithms, spanning Hamiltonian simulation, noise mitigation, and measurement tasks. In practical implementatio...
Agnostic Dynamical Decoupling for Single-Qubit Gates
Gumaro Rendon·Mar 13, 2026
We introduce a method for designing smooth single-qubit control pulses that implement a desired gate while suppressing the effect of unknown static error sources to first order. Unlike dynamically corrected gate constructions that require prior knowl...
Universal monitored dynamics in multimode bosonic systems
Shivam Patel, Catherine McCarthy, Ahana Chakraborty +5 more·Mar 13, 2026
We propose a route to study monitored many-body dynamics in multimode bosonic systems using circuit quantum electrodynamics. In this experimental setting, we construct several bosonic models comprising brickwork circuits built from beam-splitter gate...
Experimental realization of a $\cos(2\varphi)$ transmon qubit
Erwan Roverc'h, Alvise Borgognoni, Marius Villiers +7 more·Mar 13, 2026
Superconducting circuits with embedded symmetries are good candidates to robustly protect quantum information from dominant error channels. The $\cos(2\varphi)$ qubit, consisting of an island shunted to ground through a tunneling element that selecti...