Haruki Emori, Hiroyasu Tajima • Published: 2025-12-27
The out-of-time-ordered correlator (OTOC) is a powerful tool for probing quantum information scrambling, a fundamental process by which local information spreads irreversibly throughout a quantum many-body system. Experimentally measuring the OTOC, however, is notoriously challenging due to the need for time-reversed evolution. Here, we present an experimental evaluation of the OTOC on a quantum c...
Shixin Wu, Dawei Zhong, Todd A. Brun, Daniel A. Lidar • Published: 2026-03-16
Code-switching offers a route to universal, fault-tolerant quantum computation by circumventing the limitation implied by the Eastin-Knill theorem against a universal transversal gate set within a single quantum code. Here, we present a fault-tolerant code-switching protocol between two versions of the $[[8, 3, 2]]$ code. One version supports weakly fault-tolerant single-qubit Clifford gates, whil...
Ohad Lib, Hendrik Timme, Maximilian Ammenwerth, Flavien Gyger, Renhao Tao, Shijia Sun, Immanuel Bloch, Johannes Zeiher • Published: 2026-03-16
Realizing error-corrected logical qubits is a central goal for the current development of digital quantum computers. Neutral atoms offer the opportunity to coherently shuttle atoms for realizing efficient quantum error correction based on long-range connectivity and parallel atom transport. Nevertheless, time overheads in shuttling atoms and complex control hardware pose challenges to scaling curr...
Lorenzo Esposito, Andrea Papaluca, Stefano Carrazza • Published: 2026-03-16
We introduce QiboAgent, a reference implementation designed to serve as a practitioner's guideline for developing specialized coding assistants in Quantum Computing middleware. Addressing the limitations in scientific software development of general-purpose proprietary models, we explore how lightweight, open-source Large Language Models (LLMs) provided with a custom workflow architecture compare....
Rahul Deshpande, Majid Kheirkhah, Chris Rich, Richard Harris, Jack Raymond, Emile Hoskinson, Pratik Sathe, Andrew J. Berkley, Stefan Paul, Brian Barch, Daniel A. Lidar, Markus Müller, Gabriel Aeppli, Andrew D. King, Mohammad H. Amin • Published: 2026-03-16
Quantum annealing processors typically control qubits in unison, attenuating quantum fluctuations uniformly until the applied system Hamiltonian is diagonal in the computational basis. This simplifies control requirements, allowing annealing QPUs to scale to much larger sizes than gate-based systems, but constraining the class of available operations. Here we expand the class by performing analog-...
Juan M. Murillo, Ignacio García Rodríguez de Guzmán, Enrique Moguel, Javier Romero-Álvarez, Jaime Alvarado-Valiente, Álvaro M. Aparicio-Morales, Jose Garcia-Alonso, Ana Díaz Muñoz, Eduardo Fernández-Medina, Francisco Chicano, Carlos Canal, José Daniel Viqueira, Sebastián Villarroya, Eduardo Gutiérrez, Adrián Romero-Flores, Alfonso E. Márquez-Chamorro, Antonio Ruiz-Cortes, Cyrille YetuYetu Kesiku, Pedro Sánchez, Diego Alonso Cáceres, Lidia Sánchez-González, Fernando Plou • Published: 2026-03-11
The first edition of the QuantumX track, held within the XXIX Jornadas de Ingeniería del Software y Bases de Datos (JISBD 2025), brought together leading Spanish research groups working at the intersection of Quantum Computing and Software Engineering. The event served as a pioneering forum to explore how principles of software quality, governance, testing, orchestration, and abstraction can be ad...
Aman Ullah • Published: 2026-03-16
A complete architecture for cavity-free quantum networking based on collective enhancement in Rydberg atom ensembles is presented. The protocol exploits Rydberg blockade and phase-matched directional emission to eliminate optical cavities without sacrificing performance. The architecture comprises three steps: (i) local control-ensemble entanglement via Rydberg blockade with fidelity $F_{\mathrm{g...
Tirtha Haque • Published: 2026-03-16
In realistic hardware for quantum computation that possesses fault-tolerance, non-stationary noise and stochastic drift lead to logical failure from the temporal accumulation of errors, not from independent events. Static decoding and fixed calibration techniques are structurally incompatible with this situation because they do not take into account temporal correlations between errors or control-...
Soorya Rethinasamy, Ethan Guo, Alexander Wei, Mark M. Wilde, Kristina D. Launey • Published: 2024-02-22
With a view toward addressing the explosive growth in the computational demands of nuclear structure and reactions modeling, we develop a novel quantum algorithm for neutron-nucleus simulations with general potentials, which provides acceptable bound-state energies even in the presence of noise, through the noise-resilient training method. In particular, the algorithm can now solve for any band-di...
Jizhi Zhang, Ziang Yang, Zhaoyuan Meng, Zhen Lu, Yue Yang • Published: 2025-12-08
Quantum computing offers the promise of speedups for scientific computations, but its application to reacting flows is hindered by nonlinear source terms, the challenges of time-dependent simulations, and the difficulty of extracting meaningful physical quantities from quantum states. We employ a probability density function (PDF) formulation to transform the nonlinear reacting-flow governing equa...