Papers

Michal Arieli, Alex Retzker, Tuvia Gefen·Mar 12, 2026

We investigate the precision limits and optimal protocols for sensing single qubit signals in the presence of erasure noise. We study a hierarchy of precision limits achievable with metrological strategies of differing complexity, and identify the op...

Shion Yamashika, Ryusuke Hamazaki·Mar 12, 2026

Relaxation towards equilibrium is often assumed to be slower when a system starts farther from equilibrium, but this intuition fails in the Mpemba effect. Recent advances in controllable quantum platforms have enabled the exploration of its quantum a...

S. Kim, B. S. Ham·Mar 12, 2026

Quantum sensing and metrology have been intensively studied over the last several decades to surpass the fundamental shot-noise limit of classical systems and approach the Heisenberg limit. However, implementation of N00N-state-based quantum sensing ...

Silu Zhao, Li Li, Weiping Yuan +13 more·Mar 12, 2026

We demonstrate high-fidelity single-qubit gates on a C-shunt flux qubit that simultaneously combines a large anharmonicity ($\mathcal{A}/2π=848~\mathrm{MHz}$) with long relaxation time ($T_1 = 23~μ\text{s}$). The large anharmonicity significantly sup...

Can Yesilyurt·Mar 12, 2026

Valley degrees of freedom are a promising resource for solid-state quantum information. However, traditional architectures rely on engineered valley energy splitting in semiconductors to utilize the valley degree of freedom as an information carrier,...

Hikaru Wakaura, Taiki Tanimae·Mar 12, 2026

We instantiate the quantum reservoir autoencoder (QRA) with a noise-induced reservoir employing reset noise channels and address two open problems: noise-resilient reversibility and blind decryption. For a single-ciphertext protocol with 10 data qubi...

Zi-Qi Wang, Yi-Ming Sun, Yao-Dong Hu +4 more·Mar 12, 2026

Exceptional points (EPs) in non-Hermitian systems offer a remarkably strong response to weak perturbations, but the nonorthogonal nature of the corresponding eigenvectors causes noise to diverge, hindering EPs practical application. Here, we report a...

Cheng Zhang, Mauro Cirio, Xin-Qi Li +1 more·Mar 12, 2026

We analyze a global sensing scenario in which the frequency of a monitored Kerr parametric oscillator is estimated assuming limited prior information. The frequency is estimated in real-time by continuously monitoring the oscillator quadrature throug...

Ya-Long Ren, Rong-Teng Cao, Sheng-Li Ma +4 more·Mar 12, 2026

Linear quantum amplifiers are indispensable tools for quantum technologies, yet their performance is fundamentally limited by quantum noise, precluding any signal-to-noise ratio (SNR) enhancement unless supplemented by post-selection or non-classical...

Lachlan Oberg, Paul Corry, Moji Ghadimi +1 more·Mar 12, 2026

Transport engineering has significant potential to benefit from quantum computing. The rise of intelligent transport systems, autonomous vehicles, and the Internet of Things has created an unprecedented demand for efficient information processing and...

Paul L. Borrill·Mar 12, 2026

We formalize the concept of subtime -- a reversible mode of information interchange within entangled systems -- and show how classical time emerges as an asymptotic limit through decoherence. Building on the photon clock model, in which a single phot...

Jonathan Raghoonanan, Tim Byrnes·Mar 12, 2026

We present a general-purpose quantum error correction primitive based on state purification via the SWAP test, which we refer to as purification quantum error correction (PQEC). This method operates on $N$ noisy copies, requires minimally $O(M\log_2 ...

Jinwuk Seok, Changsik Cho·Mar 12, 2026

This work presents a quantum mechanical framework for analyzing quantization-based optimization algorithms. The sampling process of the quantization-based search is modeled as a gradient-flow dissipative system, leading to a Hamilton-Jacobi-Bellman (...

Keisuke Murota, Synge Todo, Suguru Endo·Mar 12, 2026

Simulating real-time dynamics under a Hamiltonian is a central goal of quantum information science. While numerous Hamiltonian-simulation quantum algorithms have been proposed, the effects of physical noise have rarely been incorporated into performa...

Zhiyuan Dong, Weichao Liang, Guofeng Zhang·Mar 12, 2026

We establish a framework for realizing back-action-evading (BAE) measurements and quantum non-demolition (QND) variables in linear quantum systems. The key condition, a purely imaginary Hamiltonian with a real or imaginary coupling operator, enables ...

Bowen Sun, D. L. Zhou·Mar 12, 2026

As a key index for applications of a device, the device's reliability is its ability to survive (function normally over time) under the influence of some environment. In this paper we present a quantum energy-storing device model with a quantum spin ...

Ran Yang, Wei Zhou, Dong-Jie Guo +11 more·Mar 12, 2026

The rapid development of photonic quantum information processing necessitates precise and programmable control over optical frequency, a capability critical not only for achieving photon indistinguishability but also for exploiting a virtually unboun...

Hanqin Bai, Shi-Yao Hou, Mu Lan·Mar 12, 2026

Superconducting quantum circuits are promising platforms for scalable quantum computing, where qubit coherence is critically determined by microscopic defects in the oxide tunneling barrier of Josephson junctions. Amorphous Al$_2$O$_3$ is widely used...

Libo Jiang, Yan Liu·Mar 12, 2026

ArXiv:2508.17898 proposed the booklet wormhole as the holographic dual of the GHZ state. This paper extends the investigation into this geometry, particularly focusing on the junction conditions for matter fields. We show that the symmetry of the GHZ...

James Bartusek, Eli Goldin·Mar 12, 2026

We construct unclonable encryption (UE) in the Haar random oracle model, where all parties have query access to $U,U^\dagger,U^*,U^T$ for a Haar random unitary $U$. Our scheme satisfies the standard notion of unclonable indistinguishability security,...