Papers
Infinite Distance Extrapolation: How error mitigation can enhance quantum error correction
George Umbrarescu, Oscar Higgott, Dan E. Browne·Mar 11, 2026
Quantum error mitigation (QEM) and quantum error correction (QEC) are two research areas that are often considered as distinct entities, and the problem of combining the two approaches in a non-trivial way has only recently started to be explored. In...
A First-Principles Thermodynamic Uncertainty Relation for Shortcuts to Adiabaticity
Guillermo Perna, Federico Centrone, Esteban Calzetta·Mar 11, 2026
We study the fundamental limitations of implementing time-dependent Hamiltonian protocols when ''time'' is provided by a quantum clock rather than an external classical parameter. For a parametric harmonic oscillator controlled through a shortcut-to-...
Kraus map closed-form solution for general master equation dynamics
Shahrukh Chishti, Francisco Andrés Cárdenas-López, Felix Motzoi·Mar 11, 2026
The Kraus representation of quantum channels allows for a precise emulation of the complex dynamics that take place on quantum processors, whether for benchmarking algorithms, predicting the performance of error correction and mitigation, or in the m...
Efficient construction of $\mathbb{Z}_2$ gauge-invariant bases for the Quantum Minimally Entangled Typical Thermal States algorithm
Reita Maeno·Mar 11, 2026
In quantum computations of gauge theories at finite temperature and finite density, it is challenging to enforce Gauss's law for all states contributing to the thermal ensemble. While various techniques for implementing gauge constraints have been pr...
Efficient and accurate two-qubit-gate operation in a high-connectivity transmon lattice utilizing a tunable coupling to a shared mode
Tuure Orell, Hao Hsu, Joona Andersson +3 more·Mar 11, 2026
Increasing connectivity and decreasing qubit-state delocalization without compromising the speed and accuracy of elementary gate operations are topical challenges in the development of large-scale superconducting quantum computers. In this theoretica...
Fundamental Limits of Non-Hermitian Sensing from Quantum Fisher Information
Jan Wiersig, Stefan Rotter·Mar 11, 2026
Exceptional points (EPs) exhibit strongly enhanced spectral responses and are therefore promising candidates for sensing applications. Whether these non-Hermitian degeneracies provide a genuine advantage in the quantum regime has been the subject of ...
Do single-shot projective readouts necessarily estimate the $T_1$ lifetime ?
Aparajita Modak, Sundeep Kapila, Bent Weber +3 more·Mar 11, 2026
When single-shot qubit readout protocols are adapted for multilevel systems, theoretical $T_1$ lifetime calculations often fall short of capturing the experimental lifetime trends. We identify extrinsic population dynamics as the fundamental origin o...
Reducing Quantum Error Mitigation Bias Using Verifiable Benchmark Circuits
Joseph Harris, Kevin Lively, Peter Schuhmacher·Mar 10, 2026
We present a simple, malleable and low-overhead approach for improving generic biased quantum error mitigation (QEM) methods, achieving up to 15% fidelity improvements over standard QEM on 100-qubit circuits with up to 2000 entangling gates. We do so...
Noise Models Impacts and Mitigation Strategies in Photonic Quantum Machine Learning
A. M. A. S. D. Alagiyawanna, Asoka Karunananda·Mar 10, 2026
Photonic Quantum Machine Learning (PQML) is an emerging method to implement scalable, energy-efficient quantum information processing by combining photonic quantum computing technologies with machine learning techniques. The features of photonic tech...
Sensing Low-Frequency Field with Rydberg Atoms via Quantum Weak Measurement
Ding Wang, Shenchao Jin, Xiayang Fan +5 more·Mar 10, 2026
Recently, Rydberg atom has emerged as an attractive choice to realize quantum sensing of low-frequency electric field. The progress so far has mostly utilized the intensity and phase changes in probe laser and the corresponding detection mechanism st...
Cluster-Adaptive Sample-Based Quantum Diagonalization for Strongly Correlated Systems
Byeongyong Park, Sanha Kang, Jongseok Seo +4 more·Mar 10, 2026
Strongly correlated electronic systems exhibit inherently multiconfigurational wave functions, making it difficult to construct compact variational subspaces that preserve the essential multireference character. Quantum computing has emerged as a pro...
Fictitious Copy Quantum Error Mitigation
Akib Karim, Harish J. Vallury, Muhammad Usman·Mar 10, 2026
Errors are arguably the most pressing challenge impeding practical applications of quantum computers, which has instigated vigorous research on the development of quantum error mitigation (QEM) techniques. Existing QEM methods suppress errors with a ...
Quantum Sensing of Birefringence Beyond the Classical Limit with a Hyper-Entangled SU(1,1) Interferometer
Samata Gokhale, Netanel P. Yaish, Michal Natan +3 more·Mar 9, 2026
Quantum interferometric sensing plays a crucial role in a wide range of applications, including quantum metrology, quantum imaging, and quantum lithography, where minute phase shifts carry valuable physical information. The strength of quantum sensin...
Extrapolative Quantum Error Mitigation in Continuous-Variable Systems beyond the Training Horizon
Jingpeng Zhang, Shengyong Li, Jie Han +3 more·Mar 9, 2026
Continuous-variable (CV) quantum systems provide a versatile platform for quantum information processing, in which quantum states can be represented in the quadrature phase space. In realistic implementations, environmental noise, primarily photon lo...
Quantum information advantage based on Bell inequalities
Rahul Jain, Srijita Kundu·Mar 9, 2026
Recently, Kretschmer et al. [KGD+25] presented an experimental demonstration of a proposed quantum information advantage protocol. We present an alternate proposal based on a relation derived from parallel-repeated CHSH games. Our memory measure is b...
Four-state discrimination for a pair of spin qubits via gate reflectometry
Aritra Sen, András Pályi·Mar 8, 2026
Single-electron spin qubits defined in quantum dots are used as building blocks of a semiconductor-based quantum computer. Readout in a scaled-up version of such a quantum computer is expected to rely on the Pauli Spin Blockade (PSB) mechanism. A des...
Lindbladian Learning with Neural Differential Equations
Timothy Heightman, Roman Aseguinolaza Gallo, Edward Jiang +3 more·Mar 8, 2026
Inferring the dynamical generator of a many-body quantum system from measurement data is essential for the verification, calibration, and control of quantum processors. When the system is open, this task becomes considerably harder than in the purely...
Entanglement Fidelity in Standard Quantum Channels
Niccolò Zanieri, Marios Kountouris·Mar 8, 2026
Entanglement fidelity quantifies how well a quantum channel preserves the correlations between a transmitted system and an inaccessible reference system. We derive closed-form expressions for the entanglement fidelity associated with several standard...
Optimal multiparameter quantum estimation in accelerating Unruh-DeWitt detectors
Omar Bachain, Elhabib Jaloum, Mohamed Amazioug +3 more·Mar 8, 2026
The quantum Fisher information matrix (QFIM) is central to multiparameter quantum metrology, dictating the attainable sensitivity via the quantum Cramér-Rao bound. In this work, we investigate the ultimate precision limits for relativistic quantum th...
Machine Learning Techniques for Enhancing Quantum Key Distribution
Ali Al-Kuwari, Safaa Alqrinawi, Lujayn Al-Amir +2 more·Mar 7, 2026
Quantum Key Distribution (QKD) offers theoretically unbreakable security by leveraging quantum mechanics. However, practical implementation is challenged by environmental vulnerabilities, noise, and hardware imperfections. Recently, Machine Learning ...