Papers

Hitomi Mori, Yuta Kikuchi, Marcello Benedetti +1 more·Jan 23, 2026

Quantum linear system (QLS) solvers are a fundamental class of quantum algorithms used in many potential quantum computing applications, including machine learning and solving differential equations. The performance of quantum algorithms is often mea...

Yury Chernyak, Ijaz Ahamed Mohammad, Martin Plesch·Jan 23, 2026

While quantum computers are a very promising tool for the far future, in their current state of the art they remain limited both in size and quality. This has given rise to hybrid quantum-classical algorithms, where the quantum device performs only a...

Elnaz Darsheshdar, Seyed Mostafa Moniri·Jan 23, 2026

We study a minimal model for charging a quantum battery consisting of a two-level system (TLS) acting as a charger, coupled to a harmonic oscillator that serves as the quantum battery. A single-photon quantum pulse of light excites the TLS, which sub...

Jaemin Seo·Jan 23, 2026

Quantum neural networks (QNNs) provide expressive probabilistic models by leveraging quantum superposition and entanglement, yet their practical training remains challenging due to highly oscillatory loss landscapes and noise inherent to near-term qu...

Fabian M. Faulstich, Svala Sverrisdóttir·Jan 23, 2026

We develop and numerically analyze an algebraic-geometric framework for spin-adapted coupled-cluster (CC) theory. Since the electronic Hamiltonian is SU(2)-invariant, physically relevant quantum states lie in the spin singlet sector. We give an expli...

Leonardo Zambrano, Teodor Parella-Dilmé, Antonio Acín +1 more·Jan 23, 2026

The accurate characterization of quantum systems is essential for the advancement of quantum technologies. In particular, certifying convex functions of quantum states plays a central role in many applications. We present a certification method for e...

Marijn Venderbosch, Rik van Herk, Zhichao Guo +11 more·Jan 23, 2026

Neutral atoms for quantum computing applications show promise in terms of scalability and connectivity. We demonstrate the realization of a versatile apparatus capable of stochastically loading a 5x5 array of optical tweezers with single $^{88}$Sr at...

Pavel Exner, Jiří Lipovský, Jan Pekař·Jan 23, 2026

We demonstrate how resonances in a quantum graph consisting of a compact core and semi-infinite leads can be identified from the eigenvalue behavior of the cut-off system.

Ting Hsu, Wen-Han Png, Kuan-Ting Lin +2 more·Jan 23, 2026

Towards the scalable realization of a quantum computer, a quantum charge-coupled device (QCCD) based on ion shuttling has been considered a promising approach. However, the processes of detaching an ion from an array, reintegrating it, and driving no...

Teng-fei Yan, Zhuo-zhuo Wang, Qi-qi Li +3 more·Jan 23, 2026

Quantum sensing based on two-photon interferometry manifests quantum superiority beyond the classical precision limit. However, this superiority is usually diminished inevitably by the noise. Here, we analyze the sensitivity of two typical two-photon...

Partha Ghose·Jan 23, 2026

Indefinite causal order (ICO) has been studied via higher-order quantum processes (e.g.\ the quantum switch), process matrices, and quantum-gravity proposals involving superposed causal structure, yet the meaning of ``indefiniteness'' and its relatio...

Hui Zhang, Yiming Ma, Yuancheng Zhan +6 more·Jan 23, 2026

Quantum technologies have surpassed classical systems by leveraging the unique properties of superposition and entanglement in photons and matter. Recent advancements in integrated quantum photonics, especially in silicon-based and lithium niobate pl...

Kaur Kristjuhan, Dominic W. Berry·Jan 23, 2026

Quantum phase estimation is an important routine in many quantum algorithms, particularly for estimating the ground state energy in quantum chemistry simulations. This estimation involves applying powers of a unitary to the ground state, controlled b...

Wonjun Lee, Hyukjoon Kwon, Gil Young Cho·Jan 23, 2026

The efficient generation of random quantum states is a long-standing challenge, motivated by their diverse applications in quantum information processing tasks. In this work, we identify entanglement as the key resource that enables local random unit...

Bing Xie, Lin Zhang·Jan 23, 2026

This note introduces a family of circulant quantum channels -- a subclass of the mixed-permutation channels -- and investigates its key structural and operational properties. We show that the image of the circulant quantum channel is precisely the se...

Yongxian Qian, Ying-Chia Lin, Seyedehsara Hejazi +12 more·Jan 23, 2026

Neuronal electrical activity underlies human cognition including perception, attention, memory, language, and decision-making. Yet its direct, noninvasive measurement in the living human brain remains a fundamental challenge. Existing neuroimaging te...

Jibang Fu, Bo Ren, Jiandong Ouyang +8 more·Jan 23, 2026

Airbridges are essential for creating high-performance, low-parasitic interconnects in integrated circuits and quantum devices. Conventional multi-step fabrication methods hinder miniaturization and introduce process-related defects. We report a simp...

Gunsik Min, Youngjin Seo, Jun Heo·Jan 23, 2026

Efficient spectrum sharing in the Citizens Broadband Radio Service (CBRS) band is essential for maximizing 5G network capacity, particularly when high-traffic base stations require simultaneous access to multiple channels. Standard formulations of th...

A. Say·Jan 23, 2026

Polynomial-time quantum Turing machines are provably superior to their classical counterparts within a common space bound in $o(\log \log n)$. For $\Omega(\log \log n)$ space, the only known quantum advantage result has been the fact $\mathsf{BPTISP}...

Răzvan Bărbulescu, Mugurel Barcau, Vicenţiu Paşol +1 more·Jan 23, 2026

In this work we study quantitative existence results for genus-$2$ curves over $\mathbb{Q}$ whose Jacobians have Mordell-Weil rank at least $1$ or $2$, ordering the curves by the naive height of their integral Weierstrass models. We use geometric tec...