Papers

Eoin O'Connor, Jiayu He, Matteo G. A. Paris +1 more·Jul 7, 2026

Unitary encoding of a single parameter provides quadratic enhancement in precision, with the quantum Fisher information scaling quadratically with the encoding time. However, when estimating multiple parameters simultaneously, this fundamental scalin...

Rui Wang, Adithi Udupa, Timo Hillmann +3 more·Jul 7, 2026

Bosonic quantum error correction (QEC) relies on non-Gaussian bosonic encodings whose preparation cost is a central practical constraint. In this work, we use stellar rank as a resource measure to design and benchmark bosonic codes under finite non-G...

P. Stammer, J. Rivera-Dean, E. Pisanty +1 more·Jul 7, 2026

Attosecond metrology is the ability to measure ultrafast optical light-wave oscillations, yet its approach has been limited to classical fields. Hence, the influence of the fluctuations of a quantum field on attosecond measurements has remained unexp...

Tien-Ho Chang, Chi-Wei Lee, Jian-Chang Zeng +12 more·Jul 7, 2026

Hole spin qubits in undoped Ge/SiGe quantum well structures have advanced rapidly in performance and scalability. However, stringent multi-layer patterning and overlay requirements of conventional overlapping-gate devices create a bottleneck for acad...

Nathaniel Johnston, Sarah Plosker, Luis M. B. Varona·Jul 7, 2026

A graph with Laplacian matrix $L$ is called Laplacian integral if the eigenvalues of $L$ are all integers, and it is called $\{-1,0,1\}$-diagonalizable if $L$ has a full set of eigenvectors with entries from $\{-1,0,1\}$. We herein develop a structur...

Xian Shi·Jul 7, 2026

Differential privacy provides a rigorous framework for quantifying privacy leakage in data analysis, while its quantum extensions have become increasingly relevant with the development of quantum computing and quantum machine learning. In this work, ...

Dalin Boriçi, Nicolas Regnault, Cristiano Ciuti·Jul 7, 2026

We investigate how cavity-mediated attractive electron-electron interactions modify the excitation gaps of fractional quantum Hall states within the composite-fermion framework. We compute both the neutral magnetoroton excitation spectrum and the cha...

Josef Pavlicek·Jul 7, 2026

This paper presents the design and evaluation of a maintainable hybrid generative architecture for automated music harmony generation from melody. The proposed system combines quantum-inspired candidate exploration over overlapping melodic contexts w...

Giuliano Chiriacò·Jul 7, 2026

We introduce a mapping between the ground state of interacting fermionic Hamiltonians and the non-equilibrium steady state of a purely dissipative open quantum system. Within the framework of third quantization, we map the Fermi-Hubbard Hamiltonian o...

Niko Jokela, Aatu Rajala, Tobias Rindlisbacher·Jul 7, 2026

We nonperturbatively compute Rényi entropies for strip-shaped subregions in the three-dimensional O(4) model at finite density on the lattice. By using a dual variable representation and a tailored worm algorithm, we circumvent the sign problem when ...

Hanyu Xue·Jul 7, 2026

Braiding statistics of $p$- and $q$-dimensional topological excitations is conventionally defined in $p+q+2$ spatial dimensions. We find a novel statistical process $W_N(X,Y)=(Y^{-1}X^{-1})^N(YX)^N$ for two order-$N$ excitations in $p+q+1$ dimensions...

Christian H. Christiansen, Kasper H. Nielsen, Alisha Nanwani +26 more·Jul 7, 2026

Spin-photon interfaces based on silicon quantum emitters offer a scalable platform for quantum computing and networking. However, achieving coherent photon emission remains a primary challenge due to stringent material quality requirements. To overco...

Zeno Bacciconi, Min Long, Hernan Xavier +3 more·Jul 7, 2026

Synthetic quantum matter provides a highly tunable route to fractional quantum Hall physics beyond the constraints of conventional electronic materials. However, previous theoretical studies have mostly focused on their ground state properties. It re...

Xinyu Tang, Yi-hsin Lin, Yan Zhu +5 more·Jul 7, 2026

Wigner function learning is a central tool for characterizing continuous variable quantum systems. A fundamental challenge in this setting is to infer a continuous phase-space function from sparse pointwise measurement data, a task that becomes incre...

Jian Xu, Delu Zeng, John Paisley +1 more·Jul 7, 2026

Parameterized quantum circuits (PQCs) are increasingly used as policies and value functions in quantum reinforcement learning, yet it remains unclear when and why quantum policies generalize. We give a PAC-Bayesian account in which generalization is ...

Daniel Loss·Jul 7, 2026

Rising energy demand from data-center and AI applications has renewed interest in reversible computation, where logic need not dissipate heat at every step if information is uncomputed. Implementations have so far been classical: adiabatic CMOS reduc...

Sonali Brahma, Trishna Kalita, Himangshu Prabal Goswami·Jul 7, 2026

We investigate the estimation of bath-induced coherence in a finite quantum system interacting with thermal reservoirs. Enhancement of coherence estimation is transient and the estimation precision totally disappears at the steady state despite the s...

Joshua M. Courtney·Jul 7, 2026

We characterize the Tanner graph spectrum of hypergraph-product (HGP) / lifted-product (LP) codes and bivariate-bicycle (BB) codes, informing qubit routing for three-dimensional reconfigurable qubit architectures. Syndrome-extraction routing depth on...

A. Y. Klimenko·Jul 7, 2026

CP bias in proton--antiproton diffractive dissociation can be viewed from several philosophical perspectives, notably stochastic realism and stochastic epistemicism. When combined with the presumption of temporal symmetry, stochastic realism suggests...

Gabriele Coci, Salvatore Plumari, Giuseppe Falci·Jul 7, 2026

We study the quantum decoherence of a bound state interacting with a reservoir of strongly interacting matter within the framework of open quantum systems. The bound state is modeled as a quantum harmonic oscillator whose parameters are tuned to repr...