Papers

Ting Lin, Zi-Hao Qin, Zheng-Yuan Xue +1 more·Apr 4, 2026

High-fidelity quantum operations require the system dynamics to be strictly confined to the computational subspace. In practice, however, control fields inevitably couple to leakage levels, giving rise to quantum state leakage that significantly redu...

Mitchell A. Thornton·Apr 4, 2026

We extend the algebraic diversity (AD) framework from classical signal processing to quantum measurement theory. The central result -- the Quantum Algebraic Diversity (QAD) Theorem -- establishes that a group-structured positive operator-valued measu...

Igor Klep, Nando Leijenhorst, Victor Magron·Apr 4, 2026

The CHSH mod 3 Bell inequality is a natural testbed for higher-dimensional quantum nonlocality, yet its maximal quantum violation and self-testing properties have remained unresolved. We determine its exact maximal quantum value and show that, up to ...

Ben Craps, Marine De Clerck, Oleg Evnin +1 more·Apr 4, 2026

The statistics of gaps between quantum energy levels is a hallmark criterion in quantum chaos and quantum integrability studies. The relevant distributions corresponding to exactly integrable vs. fully chaotic systems are universal and described by t...

Bin Ye, Ruitao Chen, Lei Yin·Apr 4, 2026

We present a unified quantum-mechanical derivation of the Wallis formula from two solvable radial systems: the circular states of the three-dimensional isotropic harmonic oscillator and the lowest-radial-branch states of the planar Fock--Darwin probl...

Si-Yan Lin, Fei Gao, Ye-Jun Xu +4 more·Apr 4, 2026

We propose a scheme to engineer the superradiant phase transition (SPT) in cavity magnonics by periodically modulating the frequency of the magnon mode. The studied system is composed of a yttrium iron garnet (YIG) sphere positioned inside a microwav...

Bing Yu, Xiao-Yong Yang, Xiaoli Hu +2 more·Apr 4, 2026

Black hole spacetimes provide a natural setting for quantum systems in curved spacetime, where effects such as Hawking radiation arise from event horizons. In this work, we investigate the impact of the Hawking effect on quantum imaginarity in Schwar...

I. Pavlov, A. Chaikovskaia, D. Karlovets·Apr 4, 2026

We investigate absorption and scattering of structured light by atoms, treating the photon and the atomic center of mass as spatially localized wave packets. We show that vortex photons can transfer orbital angular momentum (OAM) to the atomic center...

Md Aquib Molla, Sanchari Goswami·Apr 4, 2026

We study a discrete-time quantum walk in presence of a detector at $x_D$ initially. The detector here is repeatedly removed after a span of $t_R$, the removal time, and reinserted at random locations. Two relocation rules are considered here: In Mode...

Jun-Hai Zhao, Wen-Qiang Liu, Hai-Rui Wei·Apr 4, 2026

High-dimensional quantum systems greatly outperform their two-dimensional counterparts in channel capacity, quantum complexity and efficiency, quantum communication security, etc. Bell-state analyzer (BSA) is a crucial prerequisite for a number of qu...

Guoqing Tian, Xin-You Lü·Apr 4, 2026

Subradiance, a hallmark cooperative phenomenon in waveguide QED, is characterized by a universal power-law scaling of decay rates with system size and underpins many applications in quantum information storage. Here, we demonstrate that disorder driv...

Carlos Galindo, Fernando Hernando, Helena Martín-Cruz +1 more·Apr 4, 2026

Literature provides several bounds for quantum local recovery, which essentially consider the number of message qudits, the distance, the length, and the locality of the involved codes. We give a family of $J$-affine variety codes that result in impu...

Hui Yu, Jiangping Hu, Shi-Xin Zhang·Apr 4, 2026

Monitored quantum circuits host a rich variety of exotic non-equilibrium phases. Among the most representative examples are measurement-induced phase transitions between distinct area-law entangled states. However, because these transitions are chara...

Kentaro Ohno, Nozomu Togawa·Apr 4, 2026

Quantum annealing is a quantum algorithm to solve combinatorial optimization problems. In the current quantum annealing devices, the dynamic range of the input Ising Hamiltonian, defined as the ratio of the largest to the smallest coefficient, signif...

Daisuke Ishii, Rizwan Jahangir·Apr 4, 2026

This paper studies how post-quantum cryptographic (PQC) security assumptions can be represented and communicated through a structured, layered framework that is useful for technical interpretation but does not replace formal cryptographic proofs. We ...

Tzula B. Propp, Benedikt Tissot, Anders S. Sørensen +1 more·Apr 3, 2026

A single photon in a superposition of $d$ modes naturally encode a $d$-dimensional quantum system, a so-called qudit. We show that such superpositions can be leveraged to achieve a quantum speed-up of remote remote state preparation (RSP): a primitiv...

Cooper M. Selco, Christian Bengs, Chaitali Shah +1 more·Apr 3, 2026

Periodic (Floquet) driving enables Hamiltonian engineering and nonequilibrium phases, but interacting systems eventually heat by absorbing energy from the drive. Disorder can greatly delay this process, yielding long-lived prethermal plateaus. Here w...

Yang Xu, Hao Zhang, Wenwen Zhang +5 more·Apr 3, 2026

High-gain spontaneous parametric down-conversion (SPDC) produces bright squeezed vacuum with rich high-dimensional entanglement, but its output is inherently multimodal and non-perturbative, making the full modal characterization a major computationa...

Utkarsh Singh, Aaron Z. Goldberg, Christoph Simon +1 more·Apr 3, 2026

Reservoir computing promises a fast method for handling large amounts of temporal data. This hinges on constructing a good reservoir--a dynamical system capable of transforming inputs into a high-dimensional representation while remembering propertie...

Pradeep Mantha, Florian J. Kiwit, Nishant Saurabh +2 more·Apr 3, 2026

Hybrid quantum-classical applications pose significant resource management challenges due to heterogeneity and dynamism in both infrastructure and workloads. Quantum-HPC environments integrate quantum processing units (QPUs) with diverse classical re...