Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Universal Protection of Quantum States from Decoherence
Francesco Atzori, Salvatore Virzì, Francesco Devecchi +6 more·Feb 20, 2026
The fragility of quantum coherence fundamentally limits the scalability of quantum technologies, as unavoidable environmental interactions induce decoherence and rapidly degrade quantum properties. The Quantum Zeno Effect offers a powerful route to s...
Instability as a Quantum Resource
Goni Yoeli, Gilad Gour·Feb 20, 2026
We consolidate coherence, athermality, and nonuniformity as sub-resources within an underlying quantum resource theory: instability. We formulate instability axiomatically as the transient information within a decaying physical system. Specifying a d...
Dispersive Hong-Ou-Mandel Interference with Finite Coincidence Windows
T. J. Walstra, A. J. Hasenack, P. W. H. Pinkse +1 more·Feb 20, 2026
Hong-Ou-Mandel (HOM) interference is a fundamental tool for assessing photon indistinguishability in quantum information processing. While the effect of chromatic dispersion on HOM interference has been widely studied, the interplay between dispersio...
Flux-Activated Resonant Control of a Bosonic Quantum Memory
Fernando Valadares, Aleksandr Dorogov, Tanjung Krisnanda +4 more·Feb 20, 2026
Universal control of bosonic degrees of freedom provides a hardware-efficient route for quantum information processing with high-dimensional systems. Bosonic circuit quantum electrodynamics (cQED), which leverages auxillary transmons to coherently co...
Directional Dynamics of the Non-Hermitian Skin Effect
Bin Yi·Feb 20, 2026
The dynamical consequences of the non-Hermitian skin effect (NHSE) remain largely unexplored despite extensive studies of its static properties. Here we address this gap by applying quantum Liang information flow (QLIF) an inherently directional meas...
Gaussian Dynamical Quantum State Tomography
Hjalmar Rall·Feb 20, 2026
Standard quantum state tomography assumes sufficient control of a system to measure an informationally complete set of observables. Dynamical quantum state tomography (DQST) presents an alternative: given a system with known dynamics and a single fix...
A Tailored Fidelity Estimation and Purification Method for Entangled Quantum Networks
Takafumi Oka, Michal Hajdušek, Shota Nagayama +1 more·Feb 20, 2026
We present a method to conduct both quantum state reconstruction and entanglement purification simultaneously that is advantageous in several respects over previous work in this direction, showing that the number of Bell pairs necessary to boot a qua...
Time uncertainty and fundamental sensitivity limits in quantum sensing: application to optomechanical gravimetry
Salman Sajad Wani, Saif Al-Kuwari, Arshid Shabir +3 more·Feb 20, 2026
High-sensitivity accelerometers and gravimeters, achieving the ultimate limits of measurement sensitivity are key tools for advancing both fundamental and applied physics. While numerous platforms have been proposed to achieve this goal, from atom in...
Manipulating heterogeneous quantum resources over a network
Ray Ganardi, Jeongrak Son, Jakub Czartowski +2 more·Feb 19, 2026
Quantum information processing relies on a variety of resources, including entanglement, coherence, non-Gaussianity, and magic. In realistic settings, protocols run on networks of parties with heterogeneous local resource constraints, so different re...
Approaching the Limit in Multiparameter AC Magnetometry with Quantum Control
Takuya Isogawa, Zhiyao Hu, Ayumi Kanamoto +9 more·Feb 19, 2026
Simultaneously estimating multiple parameters at the ultimate limit is a central challenge in quantum metrology, often hindered by inherent incompatibilities in optimal estimation strategies. At its most extreme, this incompatibility culminates in a ...
Phase-sensitive representation of Majorana stabilizer states
Tomislav Begušić, Garnet Kin-Lic Chan·Feb 19, 2026
Stabilizer states hold a special place in quantum information science due to their connection with quantum error correction and quantum circuit simulation. In the context of classical simulations of many-body physics, they are an example of states th...
Simulating quantum measurements without using superposition
Gabriele Cobucci, Alexander Bernal, Roope Uola +1 more·Feb 19, 2026
Superposition is the core feature that sets quantum theory apart from classical physics. Here, we investigate whether sets of quantum measurements can be modelled by using only devices that are operationally classical, in the sense that they have no ...
Tight any-shot quantum decoupling
Mario Berta, Hao-Chung Cheng, Yongsheng Yao·Feb 19, 2026
Quantum information decoupling is a fundamental primitive in quantum information theory, underlying various applications in quantum physics. We prove a novel one-shot decoupling theorem formulated in terms of quantum relative entropy distance, with t...
Experimental certification of ensembles of high-dimensional quantum states with independent quantum devices
Yong-Nan Sun, Meng-Yun Ma, Qi-Ping Su +3 more·Feb 19, 2026
When increasing the dimensionality of quantum systems, high-dimensional quantum state certification becomes important in quantum information science and technology. However, how to certify ensembles of high-dimensional quantum states in a black-box s...
Superiority of Krylov shadow tomography in estimating quantum Fisher information: From bounds to exactness
Yuan-Hao Wang, Da-Jian Zhang·Feb 19, 2026
Estimating the quantum Fisher information (QFI) is a crucial yet challenging task with widespread applications across quantum science and technologies. The recently proposed Krylov shadow tomography (KST) opens a new avenue for this task by introduci...
Detecting nonequilibrium phase transitions via continuous monitoring of space-time trajectories and autoencoder-based clustering
Erik Fitzner, Francesco Carnazza, Federico Carollo +1 more·Feb 19, 2026
The characterization of collective behavior and nonequilibrium phase transitions in quantum systems is typically rooted in the analysis of suitable system observables, so-called order parameters. These observables might not be known a priori, but the...
Les Houches lectures on random quantum circuits and monitored quantum dynamics
Romain Vasseur·Feb 19, 2026
These lecture notes are based on lectures given by the author at the Les Houches 2025 summer school on "Exact Solvability and Quantum Information". The central theme of these notes is to apply the philosophy of statistical mechanics to study the dyna...
Quantum-Channel Matrix Optimization for Holevo Bound Enhancement
Hong Niu, Chau Yuen, Alexei Ashikhmin +1 more·Feb 19, 2026
Quantum communication holds the potential to revolutionize information transmission by enabling secure data exchange that exceeds the limits of classical systems. One of the key performance metrics in quantum information theory, namely the Holevo bou...
Fault-tolerant interfaces for quantum LDPC codes
Matthias Christandl, Omar Fawzi, Ashutosh Goswami·Feb 18, 2026
The preparation of a quantum state using a noisy quantum computer (gate noise strength $δ$), will necessarily affect an O($δ$)-fraction of the qubits, no matter which protocol is used. Here, we show that fault-tolerant quantum state preparation can b...
Adaptive Aborting Schemes for Quantum Error Correction Decoding
Sanidhay Bhambay, Prakash Murali, Neil Walton +1 more·Feb 18, 2026
Quantum error correction (QEC) is essential for realizing fault-tolerant quantum computation. Current QEC controllers execute all scheduled syndrome (parity-bit) measurement rounds before decoding, even when early syndrome data indicates that the run...