Papers
Live trends in quantum computing research, updated daily from arXiv.
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22
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13,404 papers in 12 months (-22% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Automated Discovery of Gadgets in Quantum Circuits for Efficient Reinforcement Learning
Oleg M. Yevtushenko, Florian Marquardt·Sep 29, 2025
Reinforcement learning (RL) has proven itself as a powerful tool for the discovery of quantum circuits and quantum protocols. We have recently shown that including composite quantum gates -- referred to as ``gadgets'' -- in the action space of RL age...
Study of nuclear magnetic resonance spectra with the multi-modal multi-level quantum complex exponential least squares algorithm
Antonio Marquez Romero, Josh J. M. Kirsopp, Giuseppe Buonaiuto +1 more·Sep 29, 2025
We present a novel application of the multi-modal, multi-level quantum complex exponential least squares (MM-QCELS) algorithm, a state-of-the-art, early fault-tolerant quantum phase estimation (QPE) technique, to the simulation and analysis of nuclea...
Dark-fringe interferometer with dynamic phase control for Mössbauer science
Miriam Gerharz, Dominik Lentrodt, Lars Bocklage +10 more·Sep 29, 2025
Interference is a powerful tool for measuring and control. In Mössbauer science, interference effects are essential to most applications, due to the coherent scattering nature. However, Mössbauer interferometry remains challenging, due to stability r...
Reconstructing Quantum States and Expectations via Dynamical Tomography
Marco Peruzzo, Tommaso Grigoletto, Francesco Ticozzi·Sep 29, 2025
When the dynamics of a quantum system of interest is known, an informationally-complete set of observables is not needed for state reconstruction via tomographic techniques: letting the system evolve before performing the measurement allows one to ef...
T-duality and bosonization as examples of continuum gauging and disentangling
Gertian Roose, Erez Zohar·Sep 29, 2025
Dualities and duality transformations form a well established methodology in various aspects of quantum many body physics and quantum field theories, allowing one to exploit equivalence between models which may naively seem completely different in or...
Information Loss and Cost in Symmetry Breaking
Javier Molina-Vilaplana, Germán Sierra, H. C. Zhang·Sep 29, 2025
We develop an algebraic and information-theoretic framework to characterize symmetry breaking of generalized, non-invertible symmetries in two spatial dimensions. The reduction of symmetry is modeled within subfactor theory, where condensable Frobeni...
Non-positive measurements aren't beneficial in quantum metrology for unitary encoding, but can be for open schemes
Paranjoy Chaki, Debarupa Saha, Kornikar Sen +1 more·Sep 29, 2025
We investigate whether non-positive operator-valued measurements can be beneficial for quantum metrology. For unitary encoding, we show that non-positive measurements offer no advantage over positive ones. Going over to open encoding, we find, howeve...
Bandits roaming Hilbert space
Josep Lumbreras·Sep 29, 2025
This thesis studies the exploration and exploitation trade-off in online learning of properties of quantum states using multi-armed bandits. Given streaming access to an unknown quantum state, in each round we select an observable from a set of actio...
Broadband Magnetless Isolation in a Flux-Pumped, Dispersion-Engineered Transmission Line
M. Demarets, A. M. Vadiraj, C. Caloz +1 more·Sep 29, 2025
Isolators are commonly found in the amplification chain of microwave setups to shield sensitive devices such as superconducting qubits from noise and back-scattered signals. Conventional ferrite-based isolators are bulky, lossy and rely on strong mag...
Reducing Spatial and Temporal Dimensionality in the Multidimensional Caldeira-Leggett Model
Hongfei Zhan, Ernest W. Z. Pan, Zhenning Cai·Sep 29, 2025
Focusing on the real-time dynamics of the reduced density matrix of the multidimensional Caldeira-Leggett model, several techniques are adopted in this paper to reduce the spatial and temporal dimensionality, combined into an efficient algorithm. Fro...
Measurement-induced phase transition in interacting bosons from most likely quantum trajectory
Anna Delmonte, Zejian Li, Rosario Fazio +1 more·Sep 29, 2025
We propose a new theoretical method to describe the monitored dynamics of bosonic many-body systems based on the concept of the most likely trajectory. We show how such trajectory can be identified from the probability distribution of quantum traject...
Generation of C-band entangled photon pairs by biexciton-exciton cascade from symmetric InAs/InP quantum dots
Anna Musiał, Maja Wasiluk, Katarzyna Roszak +6 more·Sep 29, 2025
Hereby, we study the generation of pairs of polarization-entangled photons at telecom C-band by biexciton-exciton cascade from non-resonantly excited epitaxial InAs/InP quantum dots (QDs). It is realized without external tuning of the fine structure ...
An operator-Weyl-symbol approach to eigenstate thermalization hypothesis
Xiao Wang, Wen-ge Wang·Sep 29, 2025
In this letter, by an approach that employs Weyl symbols for operators, a semiclassical theory is developed for the offdiagonal function in the eigenstate thermalization hypothesis, which is for offdiagonal elements $\langle{E_i}\left|O\right|{E_j}\r...
On the Limitations of Pseudorandom Unitaries
Prabhanjan Ananth, Aditya Gulati, Yao-Ting Lin·Sep 29, 2025
Pseudorandom unitaries (PRUs), one of the key quantum pseudorandom notions, are efficiently computable unitaries that are computationally indistinguishable from Haar random unitaries. While there is evidence to believe that PRUs are weaker than one-w...
Quantum Zeno Effect in the Spatial Evolution of a Single Atom
Zheng-Yuan Zhang, Han-Chao Chen, Xin Liu +15 more·Sep 29, 2025
The quantum Zeno effect (QZE) reveals that frequent measurements can suppress quantum evolution, but the detailed dynamics of the system under finite-duration measurements in experiments remain insufficiently explored. Here, we employ an optical dipo...
Pseudorandom Unitaries in the Haar Random Oracle Model
Prabhanjan Ananth, John Bostanci, Aditya Gulati +1 more·Sep 29, 2025
The quantum Haar random oracle model is an idealized model where every party has access to a single Haar random unitary and its inverse. We construct strong pseudorandom unitaries in the quantum Haar random oracle model. This strictly improves upon p...
Nonclassical phonon pair
Yu Wang, Zhen Shen, Mai Zhang +6 more·Sep 29, 2025
Quantum-correlated photon pairs are crucial resources for modern quantum information science. Similarly, the reliable generation of nonclassical phonon pairs is vital for advancing engineerable solid-state quantum devices and hybrid quantum networks ...
Q-REACH: Quantum information Repetition, Error Analysis and Correction using Caching Network
Karl C. Linne, Yuanyuan Li, Debashri Roy +1 more·Sep 29, 2025
Quantum repeaters incorporating quantum memory play a pivotal role in mitigating loss in transmitted quantum information (photons) due to link attenuation over a long-distance quantum communication network. However, limited availability of available ...
Orchestrating multi-level magic state distillation: a dynamic pipeline architecture
Junshi Wang, Prakash Murali·Sep 29, 2025
Practical quantum computation requires high-fidelity instruction executions on qubits. Among them, Clifford instructions are relatively easy to perform, while non-Clifford instructions require the use of magic states. This makes magic state distillat...
Roadmap to planar electron-ion point Paul trap
Niklas Vilhelm Lausti, Vineet Kumar, Ivan Hudák +2 more·Sep 29, 2025
We present a technical guide to developing a quantum-mechanical system with co-trapped laser-cooled ions and electrons, aiming to utilize this mixed-species system in quantum computing and sensing. We outline a method to control the system's quantum ...