Papers
Live trends in quantum computing research, updated daily from arXiv.
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Real critical exponents from the $\varepsilon$-expansion in an interacting $U(1)$ model with non-Hermitian $Z_4$ anisotropy
Eduard Naichuk, Jeroen van den Brink, Flavio S. Nogueira·Oct 20, 2025
In quantum optics and condensed matter physics non-Hermitian phenomena are often studied under the assumption of an open physical system. However, there are examples of intrinsically non-Hermitian, though often $\mathcal{PT}$ (parity-time) symmetric,...
Double electron resonance with two ensembles of nitrogen-vacancy centers in diamond
A. Chernyavskiy, I. S. Cojocaru, S. M. Drofa +8 more·Oct 20, 2025
Nitrogen-vacancy (NV) centers in diamond are widely used in the development of a number of sensors. The sensitivity of these devices is limited by both the number of centers used and their coherent properties. While the effects on the coherent proper...
Subsystem fidelity in two-dimensional conformal field theories
Bin Sui, Yihao Wang, Jiaju Zhang·Oct 20, 2025
We investigate the short-interval expansion of the subsystem fidelity in two-dimensional conformal field theories (2D CFTs) using the operator product expansion (OPE) of twist operators. We obtain universal contributions from general quasiprimary ope...
Kinetically-induced bound states in a frustrated Rydberg tweezer array
Mu Qiao, Romain Martin, Lukas Homeier +8 more·Oct 20, 2025
Understanding how particles bind into composite objects is a ubiquitous theme in physics, from the formation of molecules to hadrons in quantum chromodynamics and the pairing of charge carriers in superconductors. The formation of bound states usuall...
Resource efficient certification of system environment entanglement solely from reduced system dynamics
Jhen-Dong Lin, Pao-Wen Tu, Kuan-Yi Lee +4 more·Oct 20, 2025
Certifying nonclassical correlations typically requires access to all subsystems, presenting a major challenge in open quantum systems coupled to inaccessible environments. Recent works have shown that, in autonomous pure dephasing scenarios, quantum...
Phase sensitivity of lossy Mach-Zehnder interferometer via photon addition operation
Qisi Zhou, Qingqian Kang, Teng Zhao +3 more·Oct 20, 2025
Photon addition operations applied to squeezed states have been shown to significantly enhance phase sensitivity. In this study, we extend this approach by applying photon addition not only to coherent states but also within a Mach--Zehnder interfero...
Automated computation of spin-density matrices and quantum observables for collider physics
Valentin Durupt, Fabio Maltoni, O. Mattelaer·Oct 20, 2025
We present a fully automated framework to compute production spin-density matrices for generic collider processes at tree level within \textsc{MadGraph5\_aMC@NLO}. The method assembles helicity amplitudes into event-by-event production matrices. Thes...
Quantum Synthetic Data Generation for Industrial Bioprocess Monitoring
Shawn M. Gibford, Mohammad Reza Boskabadi, Christopher J Savoie +1 more·Oct 20, 2025
Data scarcity and sparsity in bio-manufacturing poses challenges for accurate model development, process monitoring, and optimization. We aim to replicate and capture the complex dynamics of industrial bioprocesses by proposing the use of a Quantum W...
Preserving quantum coherence in thermal noisy systems via qubit frequency modulation
Mahshid Khazaei Shadfar, Farzam Nosrati, Ali Mortezapour +3 more·Oct 19, 2025
Quantum coherence is a key resource underpinning quantum technologies, yet it is highly susceptible to environmental decoherence, especially in thermal settings. While frequency modulation (FM) has shown promise in preserving coherence at zero temper...
Collisional relaxation in shielded dipolar molecular gases
Reuben R. W. Wang, John L. Bohn·Oct 19, 2025
We discuss the influence of collisions on the dynamics of an ultracold gas whose constituents interact via dipolar forces. This dynamics is governed by the elastic scattering cross section of the molecules, which is to some extent under the experimen...
Modified Langevin noise formalism for multiple quantum emitters in dispersive electromagnetic environments out of equilibrium
Giovanni Miano, Loris Maria Cangemi, Carlo Forestiere·Oct 19, 2025
The control of interactions among quantum emitters through nanophotonic structures offers significant opportunities for quantum technologies. However, a rigorous theoretical description of the interaction of multiple quantum emitters with complex, di...
Fractatomic Physics: An Invitation with Atomic Stability and Rydberg States in Fractal Spaces
Nhat A. Nghiem, Trung V. Phan·Oct 19, 2025
We explore the physical quantum properties of atoms in fractal spaces, both as a theoretical generalization of normal integer-dimensional Euclidean spaces and as an experimentally realizable setting. We identify the threshold of fractality at which E...
28 GHz Wireless Channel Characterization for a Quantum Computer Cryostat at 4 Kelvin
Ama Bandara, Viviana Centritto Arrojo, Heqi Deng +6 more·Oct 19, 2025
The scalability of quantum computing systems is constrained by the wiring complexity and thermal load introduced by dense wiring for control, readout and synchronization at cryogenic temperatures. To address this challenge, we explore the feasibility...
Single-letter Chain Rule for Quantum Relative Entropy
Giulio Gasbarri, Matt Hoogsteder-Riera·Oct 19, 2025
Relative entropy is the standard measure of distinguishability in classical and quantum information theory. In the classical case, its loss under channels admits an exact chain rule, while in the quantum case only asymptotic, regularized chain rules ...
Parameter Analysis and Optimization of Layer Fidelity for Quantum Processor Benchmarking at Scale
Maria Jose Lozano Palacio, Hasan Nayfeh, Matthew Ware +1 more·Oct 19, 2025
With the continued scaling of quantum processors, holistic benchmarks are essential for extensively evaluating device performance. Layer fidelity is a benchmark well-suited to assessing processor performance at scale. Key advantages of this benchmark...
Phase assumption-free multiparty quantum clock synchronization
Hatim A. Oujaa, Qiao Liu, Ebubechukwu O. Ilo-Okeke +3 more·Oct 19, 2025
We investigate methods to broadcast timing information from a central clock to all other clocks by the use of multipartite entanglement. This task is a necessary step in establishing a coordinated universal time, currently performed using classical s...
Countermeasures for Trojan-Horse Attacks on self-compensating all-fiber polarization modulator
Alberto De Toni, Aynur Cemre Aka, Costantino Agnesi +3 more·Oct 19, 2025
Quantum Key Distribution (QKD) leverages the principles of quantum mechanics to exchange a secret key between two parties. Unlike classical cryptographic systems, the security of QKD is not reliant on computational assumptions but is instead rooted i...
Long-term analysis of efficient-BB84 4-node network with optical switches in metropolitan environment
Alberto De Toni, Edoardo Bortolozzo, Alessandro Emanuele +5 more·Oct 19, 2025
Quantum Key Distribution (QKD) is a leading technology for enabling information-theoretic secure communication, with protocols such as BB84 and its variants already deployed in practical field implementations. As QKD evolves from point-to-point links...
Steady-state phase transition in one-dimensional quantum contact process
Lin Shang, Shuai Geng, Xingli Li +1 more·Oct 19, 2025
We investigate the steady-state phases of the one-dimensional quantum contact process model. We present the Liouvillian gap in the thermodynamic limit and uncover the metastability of the system. Exploiting the mean-field approximations with a novel ...
Hybrid Cramér-Rao bound for Quantum Bayes-Point Estimation with Nuisance Parameters
Jianchao Zhang, Jun Suzuki·Oct 19, 2025
We develop a hybrid framework for quantum parameter estimation in the presence of nuisance parameters. In this Bayes-point scheme, the parameters of interest are treated as fixed non-random parameters while nuisance parameters are integrated out with...