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Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Triphoton generation near atomic resonance via SSWM: Harmonic expansion for accurate optical response
Jianming Wen·Oct 18, 2025
Quantum correlations of time-frequency-entangled photon pairs generated via parametric processes are critically influenced by both the linear and nonlinear optical responses of the medium. This sensitivity is especially significant in schemes utilizi...
Distributed Quantum Amplitude Amplification
Ximing Hua, Daowen Qiu·Oct 18, 2025
Quantum amplitude amplification algorithm is an important and basic technique in quantum computing. In this paper, our goal is to study distributed quantum amplitude amplification algorithms, and the main contributions are: (1) A distributed quantum ...
Communication through the combination of quantum switch and coherent superposition of channels
Arghyabindu Patra, Abdul Q Batin, Prasanta K. Panigrahi·Oct 18, 2025
The quantization of particle trajectories gives rise to remarkable features such as the coherent superposition of quantum channels and the quantum switch, which offer significant advantages in the communication of both classical and quantum informati...
Exact Quantum Circuit Optimization is co-NQP-hard
Adam Husted Kjelstrøm, Andreas Pavlogiannis, Jaco van de Pol·Oct 18, 2025
As quantum computing resources remain scarce and error rates high, minimizing the resource consumption of quantum circuits is essential for achieving practical quantum advantage. Here we consider the natural problem of, given a circuit $C$, computing...
Hybrid Brownian SYK-Hubbard Model: from Spectral Function to Quantum Chaos
Ning Sun, Peng Zhang, Pengfei Zhang·Oct 18, 2025
Understanding the emergence of complex correlations in strongly interacting systems remains a fundamental challenge in quantum many-body physics. One fruitful approach is to develop solvable toy models that encapsulate universal properties shared by ...
Scattering theory of frequency-entangled biphoton states facilitated by cavity polaritons
Andrei Piryatinski, Nishaant Jacobus, Sameer Dambal +3 more·Oct 18, 2025
The use of quantum light to probe exciton properties in semiconductor and molecular nanostructures typically occurs in the low-intensity regime. A substantial enhancement of exciton-photon coupling can be achieved with photonic cavities, where excito...
Infrared Absorption and Laser Spectroscopy of Ho$^{3+}$ Doped K$_2$YF$_5$ Microparticles
Pakwan Chanprakhon, Michael F. Reid, Jon-Paul R. Wells·Oct 18, 2025
High-resolution absorption and laser spectroscopy are used to determine electronic energy levels for Ho$^{3+}$ ions in K$_2$YF$_5$ microparticles. A total of 72 crystal-field energy levels, distributed among 8 multiplets, are assigned. This optical d...
Quantum Origin of Diffraction from Bright and Dark States
Jian-Jian Cheng, Jun-Ling Che, Lin Zhang +1 more·Oct 18, 2025
Building upon the recently introduced particle interpretation of the double-slit experiment [Phys. Rev. Lett. 134, 133603 (2025)] which attributes interference phenomena to detector-coupled (bright) and detector-uncoupled (dark) states of light, we d...
Coherence-Mediated Quantum Thermometry in a Hybrid Circuit-QED Architecture
Shaojiang Zhu, Xinyuan You, Alexander Romanenko +1 more·Oct 18, 2025
Quantum thermometry plays a critical role in the development of low-temperature sensors and quantum information platforms. In this work, we propose and theoretically analyze a hybrid circuit quantum electrodynamics architecture in which a superconduc...
Dynamical control of quantum photon-photon interaction with phase change material
Chaojie Wang, Xutong Li, Xiuyi Ma +6 more·Oct 18, 2025
Quantum interference can produce a pivotal effective photon-photon interaction, enabling the exploration of various quantum information technologies that beyond the possibilities of classical physics. While such an effective interaction is fundamenta...
Adversarially Robust Quantum Transfer Learning
Amena Khatun, Muhammad Usman·Oct 18, 2025
Quantum machine learning (QML) has emerged as a promising area of research for enhancing the performance of classical machine learning systems by leveraging quantum computational principles. However, practical deployment of QML remains limited due to...
Emergent nonlocal interactions induced by quantized gauge fields in topological systems
Adel Ali, Alexey Belyanin·Oct 17, 2025
We study fermionic and bosonic systems coupled to a real or synthetic static gauge field that is quantized, so the field itself is a quantum degree of freedom and can exist in coherent superposition. A natural example is electrons on a quantum ring e...
Phase-Stable Optical Fiber Links for Quantum Network Protocols
Nicholas V. Nardelli, Dileep V. Reddy, Michael Grayson +5 more·Oct 17, 2025
We demonstrate the distribution of single-photon-level pulses from a mode-locked laser source over a phase-stable fiber link, achieving an optical timing jitter of less than 100 as over 10 minutes of data accumulation. This stability enables a fideli...
Commuting Embeddings for Parallel Strategies in Non-local Games
Sarah Chehade, Andrea Delgado, Elaine Wong·Oct 17, 2025
Non-local games (NLGs) provide a versatile framework for probing quantum correlations and for benchmarking the power of entanglement. In finite dimensions, the standard method for playing several games in parallel requires a tensor product of the loc...
Born series for s-wave scattering length and some exact results
N. Kaiser·Oct 17, 2025
In these notes the Born series for the $s$-wave scattering $a_0$ is calculated for a class of central potentials $V(r)$ up to sixth order in a dimensionless coupling strength $g$. Examples of exponentially decaying potentials as well truncated potent...
Decoherence-free subspaces in the noisy dynamics of discrete-step quantum walks in a photonic lattice
Rajesh Asapanna, Clément Hainaut, Alberto Amo +1 more·Oct 17, 2025
We study the noisy dynamics of periodically driven, discrete-step quantum walks in a one-dimensional photonic lattice. We find that in the bulk, temporal noise that is constant within a Floquet period leads to decoherence-free momentum subspaces, whe...
Exceptional Antimodes in Multi-Drive Cavity Magnonics
Mawgan A. Smith, Ryan D. McKenzie, Alban Joseph +2 more·Oct 17, 2025
Driven-dissipative systems provide a natural setting for the emergence of exceptional points -- i.e. non-Hermitian degeneracies where eigenmodes coalesce. These points are important for applications such as sensing, where enhanced sensitivity is requ...
Environment-imposed selection rules for nuclear-spin conversion of H$_2$ in molecular crystals
Nathan Mclane, LeAnh Duckett, Leah G. Dodson·Oct 17, 2025
Nuclear-spin conversion in molecular hydrogen is governed by strict symmetry rules that typically require magnetic fields or catalytic surfaces to break. Here we demonstrate that the intrinsic tensor composition of a non-magnetic molecular crystal fi...
Efficient Quantum State Preparation with Bucket Brigade QRAM
Alessandro Berti, Francesco Ghisoni·Oct 17, 2025
The preparation of data in quantum states is a critical component in the design of quantum algorithms. The cost of this step can significantly limit the realization of quantum advantage in domains such as machine learning, finance, and chemistry. One...
Unravelling inter-channel quantum interference in below-threshold nonsequential double ionization with statistical measures
S. Hashim, C. Figueira de Morisson Faria·Oct 17, 2025
We present a systematic study of interchannel quantum interference in laser-induced nonsequential double ionization (NSDI) within the strong-field approximation. Focusing on the below-threshold intensity regime where the recollision-excitation with s...