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Live trends in quantum computing research, updated daily from arXiv.
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Tackling the Challenges of Adding Pulse-level Support to a Heterogeneous HPCQC Software Stack: MQSS Pulse
Jorge Echavarria, Muhammad Nufail Farooqi, Amit Devra +22 more·Oct 30, 2025
We study the problem of adding native pulse-level control to heterogeneous High Performance Computing-Quantum Computing (HPCQC) software stacks, using the Munich Quantum Software Stack (MQSS) as a case study. The goal is to expand the capabilities of...
Limits of Absoluteness of Observed Events in Timelike Scenarios: A No-Go Theorem
Sumit Mukherjee, Jonte R. Hance·Oct 30, 2025
Wigner's Friend-type paradoxes challenge the assumption that events are absolute -- that when we measure a system, we obtain a single result, which is not relative to anything or anyone else. These paradoxes highlight the tension between quantum theo...
Achieving Utility-Scale Applications through Full Stack Co-Design of Fault Tolerant Quantum Computers
Katerina Gratsea, Matthew Otten·Oct 30, 2025
Quantum computing promises revolutionary advances in modeling materials and molecules. However, the up-to-date runtime estimates for utility-scale applications on certain quantum hardware systems are in the order of years rendering quantum computatio...
An introduction to Markovian open quantum systems
Shovan Dutta·Oct 30, 2025
This is a concise, pedagogical introduction to the dynamic field of open quantum systems governed by Markovian master equations. We focus on the mathematical and physical origins of the widely used Lindblad equation, its unraveling in terms of stocha...
Quantum Variational Methods for Supersymmetric Quantum Mechanics
John Kerfoot, Emanuele Mendicelli, David Schaich·Oct 30, 2025
We employ quantum variational methods to investigate a single-site interacting fermion-boson system -- an example of a minimal supersymmetric model that can exhibit spontaneous supersymmetry breaking. Our study addresses the challenges inherent in ca...
Certification and Classification of Linear Quantum Error Mitigation Methods
Zach Blunden-Codd, Mohamed Tamaazousti·Oct 30, 2025
Numerous mitigation methods exist for quantum noise suppression, making it challenging to identify the optimum approach for a specific application; especially as ongoing advances in hardware tuning and error correction are expected to reduce logical ...
JCO: Optimization Framework for Nonlinear Superconducting Circuits Using a Lumped-Element Approach and Harmonic Balance
Emanuele Palumbo, Alessandro Alocco, Andrea Celotto +4 more·Oct 30, 2025
In this contribution we present JosephsonCircuitsOptimizer.jl (JCO), a simulation and optimization framework based on the JosephsonCircuits.jl library for Julia. It models superconducting circuits that include Josephson junctions (JJs) and other nonl...
Spin-orbit coupled spin-boson model : A variational analysis
Sudip Sinha, Subhasis Sinha, Sushanta Dattagupta·Oct 30, 2025
The spin-boson (SB) model is a standard prototype for quantum dissipation, which we generalize in this work, to explore the dissipative effects on a one-dimensional spin-orbit (SO) coupled particle in the presence of a sub-ohmic bath. We analyze this...
Correlations in a quantum switch-based heat engine with measurements: A proof-of-principle demonstration
Vinicius F. Lisboa, Pedro R. Dieguez, Kyrylo Simonov +1 more·Oct 30, 2025
Allowing the order of quantum operations to exist in superposition is known to open new routes for thermodynamic tasks. We investigate a quantum heat engine where energy exchanges are driven by generalized measurements, and the sequence of these oper...
Super-Heisenberg Scaling Using Nonlinear Quantum Scrambling
Dong Xie, Chunling Xu·Oct 30, 2025
Super-Heisenberg scaling, which scales as $N^{-β}$ with $β>1$ in terms of the number of particles $N$ or $T^{-β}$ in terms of the evolution time $T$, is better than Heisenberg scaling in quantum metrology. It has been proven that super-Heisenberg sca...
Reusability of Quantum Catalysts
Haitao Ma, Yantong Li, Yingchun Kang +4 more·Oct 30, 2025
Quantum catalysts enable transformations that otherwise would be forbidden, offering a pathway to surpass conventional limits in quantum information processing. Among them, embezzling catalysts stand out for achieving near-perfect performance while t...
Network nonlocality breaking channels
Kaushiki Mukherjee, Nirman Ganguly·Oct 30, 2025
Network nonlocality, a recently noted form of nonlocality has been shown to have distinctive features, marking a significant departure from the notion of standard Bell nonlocality in the context of quantum correlations. On a pragmatic front, it has g...
Entanglement Certification in Bulk Nonlinear Crystal for Degenerate and Non-degenerate SPDC for Quantum Imaging Application
Hashir Kuniyil, Asad Ali, Saif Al-Kuwari·Oct 30, 2025
Quantum imaging with entangled photon pairs promises performance beyond classical limits, yet phase-matching, nonlinear crystal properties, and pump size jointly constrain its ultimate spatial resolution. We develop a unified model that relates these...
Quantum Random Number Generator with Internal Consistency Check and Public Verification
Rodrigo Piera, Gianluca De Santis, Agustin Sanchez +2 more·Oct 30, 2025
Quantum Random Number Generators provide true physical randomness based on quantum processes, essential for cryptographic and scientific applications. However, practical implementations face challenges in robustness and verifiability: ensuring that t...
Generation and detection of squeezed states via a synchronously pumped optical parametric oscillator
Edoardo Suerra, Samuele Altilia, Stefano Olivares +7 more·Oct 30, 2025
A synchronously pumped optical parametric oscillator (SPOPO) operating at 93 MHz is used to generate squeezed states at 1035 nm. The system features a counter-propagating beam at the same wavelength as the quantum state, which simultaneously actively...
Feynman path sum approach for simulation of linear optics
Wagner F. Balthazar, Quinn M. B. Palmer, Alex. E. Jones +2 more·Oct 30, 2025
The Feynman path integral formalism has inspired the development of memory-efficient and parallelizable classical algorithms for simulating quantum computers. We adapt this approach for the calculation of probability amplitudes of linear-optical boso...
Engineered Kerr Nonlinearities for Precise Quantum Control of Fock States
Gabriella G. Damas, Ciro Micheletti Diniz, Norton G. de Almeida +2 more·Oct 30, 2025
We present a practical design framework for high-fidelity quantum control in coupled Kerr-nonlinear oscillators, directly addressing the challenge of spectral crowding. We show that systematic spectral degeneracies, which hinder selective addressing,...
Quadratic Quantum Speedup for Finding Independent Set of a Graph
Xianjue Zhao, Peiyun Ge, Li You +1 more·Oct 30, 2025
A quadratic speedup of the quantum adiabatic algorithm (QAA) for finding independent sets (ISs) in a graph is proven analytically. In comparison to the best classical algorithm with $O(n^2)$ scaling, where $n$ is the number of vertexes, our quantum a...
Enhancing the reachability of variational quantum algorithms via input-state design
Shaojun Wu, Shan Jin, Abolfazl Bayat +1 more·Oct 30, 2025
Variational quantum algorithms (VQAs) face an inherent trade-off between expressivity and trainability: deeper circuits can represent richer states but suffer from noise accumulation and barren plateaus, while shallow circuits remain trainable and im...
Entanglement and Dynamical Scaling Laws in Quantum Superabsorption
Juan David Álvarez-Cuartas, John H. Reina·Oct 30, 2025
Quantum batteries (QBs) exploit collective quantum resources to surpass the limits of classical energy storage and power delivery. We analyze $N$-qubit cavity-coupled QBs governed by Dicke and Tavis--Cummings models under Gaussian driving and open-sy...