Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
RhoDARTS: Differentiable Quantum Architecture Search with Density Matrix Simulations
Swagat Kumar, Jan-Nico Zaech, C. M. Wilmott +1 more·Jun 4, 2025
Variational Quantum Algorithms (VQAs) are a promising approach to leverage Noisy Intermediate-Scale Quantum (NISQ) computers. However, choosing optimal quantum circuits that efficiently solve a given VQA problem is a non-trivial task. Quantum Archite...
A Unitary Encoder for Surface Codes
Pei-Kai Tsai, S. Puri·Jun 4, 2025
The surface code is a promising candidate for fault-tolerant quantum computation and has been implemented in many quantum hardware platforms. In this work, we propose a new non-local unitary circuit to encode a surface code state based on a code conv...
Make Some Noise! Measuring Noise Model Quality in Real-World Quantum Software
S. R. Maschek, J. Schwitalla, Maja Franz +1 more·Jun 4, 2025
Noise and imperfections are among the prevalent challenges in quantum software engineering for current NISQ systems. They will remain important in the post-NISQ area, as logical, error-corrected qubits will be based on software mechanisms. As real qu...
Simulating fluid vortex interactions on a superconducting quantum processor
Ziteng Wang, Jiarun Zhong, Ke Wang +8 more·Jun 4, 2025
Vortex interactions are commonly observed in atmospheric turbulence, plasma dynamics, and collective behaviors in biological systems. However, accurately simulating these complex interactions is highly challenging due to the need to capture fine-scal...
Computational Complexity and Simulability of Non-Hermitian Quantum Dynamics
Brian Barch, Daniel Lidar·Jun 3, 2025
Non-Hermitian (NH) quantum systems demonstrate striking differences from their Hermitian counterparts, leading to claims of NH advantage in areas ranging from metrology to entanglement generation. We show that in the context of quantum computation, a...
Flagged Extensions and Numerical Simulations for Quantum Channel Capacity: Bridging Theory and Computation
Vahid Nourozi·Jun 3, 2025
I will investigate the capacities of noisy quantum channels through a combined analytical and numerical approach. First, I introduce novel flagged extension techniques that embed a channel into a higher-dimensional space, enabling single-letter upper...
Ultracoherent superconducting cavity-based multiqudit platform with error-resilient control
Taeyoon Kim, Tanay Roy, Xinyuan You +26 more·Jun 3, 2025
Superconducting radio-frequency (SRF) cavities offer a promising platform for quantum computing due to their long coherence times, yet integrating nonlinear elements like transmons for control often introduces additional loss. We report a multimode q...
Universal Resources for QAOA and Quantum Annealing
Pablo Díez-Valle, Fernando J. Gómez-Ruiz, Diego Porras +1 more·Jun 3, 2025
The Quantum Approximate Optimization Algorithm (QAOA) is a variational ansatz that resembles the Trotterized dynamics of a Quantum Annealing (QA) protocol. This work formalizes this connection formally and empirically, showing the angles of a multila...
Adversarial quantum channel discrimination
Kun Fang, Hamza Fawzi, Omar Fawzi·Jun 3, 2025
We introduce a new framework for quantum channel discrimination in an adversarial setting, where the tester plays against an adversary. We show that in asymmetric hypothesis testing, the optimal type-II error exponent is precisely characterized by a ...
Nonlinear-enhanced wideband sensing via subharmonic excitation of a quantum harmonic oscillator
Hao Wu, Clayton Z. C. Ho, Grant D. Mitts +2 more·Jun 3, 2025
A key advantage of quantum metrology is the ability to surpass the standard quantum limit~(SQL) for measurement precision through the use of non-classical states. However, there is typically little to no improvement in precision with the use of non-c...
Quantum Data Centres: Why Entanglement Changes Everything
Angela Sara Cacciapuoti, Claudio Pellitteri, Jessica Illiano +4 more·Jun 3, 2025
The Quantum Internet is key for distributed quantum computing, by interconnecting multiple quantum processors into a virtual quantum computation system. This allows to scale the number of qubits, by overcoming the inherent limitations of noisy-interm...
Intrinsic Hamiltonian of Mean Force and Strong-Coupling Quantum Thermodynamics
Ignacio González, Sagnik Chakraborty, Ángel Rivas·Jun 3, 2025
We present a universal thermodynamic framework for quantum systems that may be strongly coupled to thermal environments. Unlike previous approaches, our method enables a clear definition of thermostatic properties while preserving the same gauge free...
Superconducting integrated on-demand quantum memory with microwave pulse preservation
Aleksei R. Matanin, Nikita S. Smirnov, Anton I. Ivanov +8 more·Jun 3, 2025
Microwave quantum memory represents a critical component for quantum radars and resource-efficient approaches to quantum error correction. Superconducting microwave resonators provide highly efficient storage, long coherence times, on-demand reading ...
Tour de gross: A modular quantum computer based on bivariate bicycle codes
Theodore J. Yoder, Eddie Schoute, Patrick Rall +5 more·Jun 3, 2025
We present the bicycle architecture, a modular quantum computing framework based on high-rate, low-overhead quantum LDPC codes identified in prior work. For two specific bivariate bicycle codes with distances 12 and 18, we construct explicit fault-to...
Stacking the odds: full-stack quantum system design space exploration
Hila Safi, Medina Bandic, Christoph Niedermeier +3 more·Jun 3, 2025
Design space exploration (DSE) plays an important role in optimising quantum circuit execution by systematically evaluating different configurations of compilation strategies and hardware settings. In this paper, we conduct a comprehensive investigat...
Convergence and efficiency proof of quantum imaginary time evolution for bounded order systems
T. Hartung, Karl Jansen·Jun 3, 2025
Many current and near-future applications of quantum computing utilise parametric families of quantum circuits and variational methods to find optimal values for these parameters. Solving a quantum computational problem with such variational methods ...
Exceeding the Parametric Drive Strength Threshold in Nonlinear Circuits
Mingkang Xia, Crist'obal Lled'o, Matthew Capocci +7 more·Jun 3, 2025
Superconducting quantum circuits rely on strong drives to implement fast gates, high-fidelity readout, and state stabilization. However, these drives can induce uncontrolled excitations, so-called"ionization", that compromise the fidelity of these op...
Measurement incompatibility and quantum steering via linear programming
Lucas E. A. Porto, Sébastien Designolle, S. Pokutta +1 more·Jun 3, 2025
The problem of deciding whether a set of quantum measurements is jointly measurable is known to be equivalent to determining whether a quantum assemblage is unsteerable. This problem can be formulated as a semidefinite program (SDP). However, the num...
Scalable Distributed Memory Implementation of the Quasi-Adiabatic Propagator Path Integral
R. Ovcharenko, Xiangyu Xu, B. Fingerhut·Jun 3, 2025
The accurate simulation of dissipative quantum dynamics subject to a non-Markovian environment poses persistent numerical challenges, in particular for structured environments where sharp mode resonances induce long-time system bath correlations. We ...
Fast Machine Learning for Quantum Control of Microwave Qudits on Edge Hardware
F. Sanders, Gaurav Agarwal, Luca P. Carloni +3 more·Jun 3, 2025
Quantum optimal control is a promising approach to improve the accuracy of quantum gates, but it relies on complex algorithms to determine the best control settings. CPU or GPU-based approaches often have delays that are too long to be applied in pra...