Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Cayley Commutator-free Methods for Krotov-Type Algorithms in Quantum Optimal Control
B. Wembe, Usman Ali, Torsten Meier +1 more·Mar 12, 2026
This paper presents a class of structure-preserving numerical methods for quantum optimal control problems, based on commutator-free Cayley integrators. Starting from the Krotov framework, we reformulate the forward and backward propagation steps usi...
Detecting Intrinsic and Instrumental Self-Preservation in Autonomous Agents: The Unified Continuation-Interest Protocol
Christopher Altman·Mar 11, 2026
How can we determine whether an AI system preserves itself as a deeply held objective or merely as an instrumental strategy? Autonomous agents with memory, persistent context, and multi-step planning create a measurement problem: terminal and instrum...
Saturable absorption in diamond nanophotonics
Christopher Coutts, Nicholas J. Sorensen, Elham Zohari +3 more·Mar 11, 2026
Diamond is a leading quantum photonics platform due to its ability to host qubits based on crystal defects such as nitrogen vacancy centres. Fabricating nanophotonic devices from defect-rich diamond, which is central to many quantum sensing technolog...
QuaNTUM: A Modular Quantum Communication Testbed for Scalable Fiber and Satellite Integration
Julien Chénedé, Tjorben Matthes, Josefine Krause +2 more·Mar 11, 2026
Secure communication is essential for modern society, from financial transactions to critical infrastructure. As classical encryption faces threats from advancing computational power, quantum communication provides a fundamentally secure alternative ...
Many-Body Entanglement Properties of Finite Interacting Fermionic Hamiltonians
Irakli Giorgadze, Grayson Welch, Haixuan Huang +2 more·Mar 11, 2026
We analyze many-body entanglement in interacting fermionic systems by using the $M$-body reduced density matrix. We demonstrate that if a particle number conserving fermionic Hamiltonian contains only up to $M$-body interaction terms, then its $N$-pa...
Focusing Surface-Acoustic-Wave Resonators on Thin-Film Lithium Niobate with Transverse-Mode Suppression
Ryo Sasaki, Ryusuke Hisatomi, Rekishu Yamazaki +3 more·Mar 11, 2026
Surface-acoustic-wave (SAW) resonators are a promising platform for constructing hybrid quantum systems, where confined acoustic waves enable strong interaction with various physical systems. Focusing SAW resonators, reducing mode volume while suppre...
Quantum tomography of $H \to ZZ, WW$ beyond leading order
J. A. Aguilar-Saavedra, Pier Paolo Giardino·Mar 11, 2026
We revisit quantum tomography of $H \to ZZ$ and $H \to WW$ in the presence of higher-order corrections. We verify that neither the use of an effective spin analysing power (only for $ZZ$) or a photon veto are sufficient to render the naively-construc...
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-...
Higher-Order Quantum Objects are Strong Profunctors
Matt Wilson, James Hefford·Mar 11, 2026
We explore the sense in which the existing constructions for higher-order maps on quantum theory based on causality constraints and compositionality constraints respectively, coincide. More precisely, we construct a functor F : Caus(C) -> StProf(C1) ...
Unitary imaginary time evolution and ground state preparation using multi-copy protocols
Tal Schwartzman, Torsten V. Zache, Hannes Pichler +1 more·Mar 11, 2026
Efficient low-energy state preparation is a key objective in quantum computation and quantum simulation. Quantum imaginary-time evolution replaces real-time dynamics with imaginary-time dynamics, exponentially suppressing higher-energy eigenstates. W...
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...
Auxiliary-Field Quantum Monte Carlo on Quantum Hardware via Unitary Dilation
Xiantao Li·Mar 11, 2026
We present near-term quantum algorithms for auxiliary-field quantum Monte Carlo (AFQMC), viewed as imaginary-time projection for ground-state calculation as an ensemble of one-body propagators driven by stochastic fields $Ω$. Starting from the Feynma...
Generative modeling with Gaussian Boson Sampling: classically trainable Bosonic Born Machines
Zoltán Kolarovszki, Bence Bakó, Michał Oszmaniec +2 more·Mar 11, 2026
Quantum generative modeling has emerged as a promising application of quantum computers, aiming to model complex probability distributions beyond the reach of classical methods. In practice, however, training such models often requires costly gradien...
Exact quantum scars of frustrated hardcore bosons for cross-platform realizations
Zhuoli Ding, Ruben Verresen, Zoe Z. Yan·Mar 11, 2026
Quantum many-body scars are nonthermal states exhibiting persistent revivals in an otherwise ergodic, nonintegrable quantum system. Existing examples of exact quantum scars, however, have not yet been amenable to direct experimental demonstration. He...
Rhenium as a material platform for long-lived transmon qubits
Yanhao Wang, Suhas Ganjam, Ishan Narra +2 more·Mar 11, 2026
Dielectric loss at the interfaces of superconducting films has long been recognized as limiting the performance of state-of-the-art superconducting circuits. Notably, the presence of a native oxide layer on the film is hypothesized to contribute to d...
DysonNet: Constant-Time Local Updates for Neural Quantum States
Lucas Winter, Andreas Nunnenkamp·Mar 11, 2026
Neural quantum states (NQS) provide a flexible variational framework for many-body wavefunctions, but suffer from high computational cost and limited interpretability. We introduce DysonNet, a broad class of NQS that couples strictly local nonlineari...
Hall conductance in a weakly time-reversal invariant open system
Alexander Fagerlund, Christopher Ekman, Rodrigo Arouca·Mar 11, 2026
The quantum Hall effect and the quantum anomalous Hall effect both require time-reversal invariance to be broken. We show that non-equilibrium effects can cause Hall physics to arise even when the system is weakly time-reversal symmetric and no magne...
Engineering Higher-order Effective Hamiltonians
Jiahui Chen, David Cory·Mar 11, 2026
Advancing quantum technologies requires precise and robust coherent control of quantum systems. Robust higher-order Hamiltonian engineering is essential for high-precision control and for accessing effective dynamics absent at zeroth order. Here, we ...
Integrable Free and Interacting Fermions
Zhao Zhang·Mar 11, 2026
Integrability conditions on local Hamiltonians for one-dimensional quantum systems to be free and interacting fermions are introduced. The definition of free fermion is the simultaneous satisfaction of the Yang-Baxter equation and Shastry's decorated...