Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Online Voting using Point to MultiPoint Quantum Key Distribution
Bernardo A. Huberman, Jing Wang·May 27, 2025
We propose using Point-to-Multipoint quantum key distribution (QKD) via time division multiplexing (TDM) and wavelength division multiplexing (WDM) in passive optical networks (PON) to improve the security of online voting systems.
Probing Time Reversal Symmetry Breaking using a Nonlinear Superconducting Ring Resonator
Nicolas Dirnegger, Marie Wesson, Arpit Arora +5 more·May 27, 2025
Time-reversal symmetry breaking (TRSB) has been central to detecting exotic phases of matter. Here, we leverage the circuit electrodynamics capabilities of superconducting devices to propose a novel scheme based on a multimode superconducting ring re...
Probing the quantum motion of a macroscopic mechanical oscillator with a radio-frequency superconducting qubit
Kyrylo Gerashchenko, Rémi Rousseau, Léo Balembois +11 more·May 27, 2025
Long-lived mechanical resonators like drums oscillating at MHz frequencies and operating in the quantum regime are a powerful platform for quantum technologies and tests of fundamental physics. Yet, quantum control of such systems remains challenging...
Quantum harmonic oscillator, index theorem and spectral asymmetry
Shunrui Li, Yang Liu·May 27, 2025
We report a spectral asymmetry effect in the quantum harmonic oscillator, where its partition function is identified as the Chern character. This establishes a direct link between statistical mechanics, and topological invariants (Atiyah-Singer index...
Nullifiers of non-Gaussian cluster states through homodyne measurement
Vojtěch Kala, Casper A. Breum, Mikkel V. Larsen +4 more·May 27, 2025
In continuous variable optical platforms, large-scale Gaussian cluster states have already been demonstrated, but non-Gaussian resources are essential to achieve universality and fault tolerance in measurement-based quantum computation. However, char...
Quantum Markov chain Monte Carlo method with programmable quantum simulators
Mauro D'Arcangelo, Younes Javanmard, Natalie Pearson·May 27, 2025
In this work, we present a quantum Markov chain algorithm for many-body systems that utilizes a special phase of matter known as the Many-Body Localized (MBL) phase. We show how the properties of the MBL phase enable one to address the conditions for...
Designing Fault-Tolerant Blind Quantum Computation
G. Baranes, Iria W. Wang, Francisco Machado +6 more·May 27, 2025
Blind quantum computing (BQC) is a computational paradigm that allows a client with limited quantum capabilities to delegate quantum computations to a more powerful server while keeping both the algorithm and data hidden. However, in practice, existi...
Leveraging Diffusion Models for Parameterized Quantum Circuit Generation
Daniel Barta, Darya Martyniuk, Johannes Jung +1 more·May 27, 2025
Quantum computing holds immense potential, yet its practical success depends on multiple factors, including advances in quantum circuit design. In this paper, we introduce a generative approach based on denoising diffusion models (DMs) to synthesize ...
Dissipative preparation of many-body quantum states: Toward practical quantum advantage
Lin Lin·May 27, 2025
While dissipation has traditionally been viewed as an obstacle to quantum coherence, it is increasingly recognized as a powerful computational resource. Dissipative protocols can prepare complex many-body quantum states by leveraging engineered syste...
Ultra-Broadband plug-and-play photonic circuit packaging with sub-dB loss
Erik Jung, H. Gehring, Frank Brueckerhoff-Plueckelmann +4 more·May 27, 2025
Photonic Integrated Circuits (PICs) offer transformative potential for computing systems, enabling high-bandwidth neuromorphic processors and facilitating low decoherence quantum computing on a chip scale platform. However, the development of robust ...
Towards Quantum Simulation of Meson Scattering in a Z2 Lattice Gauge Theory
Yahui Chai, Yibin Guo, Stefan Kuhn·May 27, 2025
Scattering processes are fundamental for understanding the structure of matter. At the same time, simulating the real-time dynamics of scattering processes on classical computers is challenging. Quantum computing offers a promising avenue for efficie...
A detailed study on various phases in dissipative anisotropic Dicke model
Pragna Das, Saptarshi Saha·May 26, 2025
We present a comprehensive study of different phases in the Dicke model incorporating both anisotropy and dissipation. We begin with a concise review of the quantum phase transition in this setting, highlighting how these two parameters shift the cri...
Fundamentals of Trapped Ions and Quantum Simulation of Chemical Dynamics
Guido Pagano, Wojciech Adamczyk, Visal So·May 26, 2025
Trapped atomic ions are among the most advanced platforms for quantum simulation, computation, and metrology, offering long coherence times and precise, individual control over both internal and motional degrees of freedom. In this review, we present...
Line search by quantum logic spectroscopy enhanced with squeezing and statistical tests
Ivan Vybornyi, Shuying Chen, Lukas J. Spieß +2 more·May 26, 2025
In quantum logic spectroscopy, internal transitions of trapped ions and molecules can be probed by measuring the motional displacement caused by an applied light field of variable frequency. This provides a solution to ``needle in a haystack'' proble...
Correcting noisy quantum gates with shortcuts to adiabaticity
Moallison F. Cavalcante, Bariş Çakmak, Marcus V. S. Bonança +1 more·May 26, 2025
Unitary quantum gates constitute the building blocks of Quantum Computing in the circuit paradigm. In this work, we engineer a locally driven two-qubit Hamiltonian whose instantaneous ground-state dynamics generates the controlled-NOT (CNOT) quantum ...
Full Two-Port S-Parameters at mK Temperatures: a Calibration Strategy and Uncertainty Budget
Luca Oberto, Ehsan Shokrolahzade, Emanuele Enrico +7 more·May 26, 2025
This paper describes the developed setup and characterization approach for full two-port calibrated S-parameter measurements at cryogenic temperatures, together with a complete uncertainty budget. The system developed at the Istituto Nazionale di Ric...
Catability as a metric for evaluating superposed coherent states
Šimon Bräuer, Jan Provazník, Vojtěch Kala +1 more·May 26, 2025
Superposed coherent states are central to quantum technologies, yet their reliable identification remains a challenge, especially in noisy or resource-constrained settings. We introduce a novel, directly measurable criterion for detecting cat-like fe...
Matrix-product-state approach for qubits-waveguide systems in real space
Shimpei Goto·May 26, 2025
We present a matrix-product-state-based numerical approach for simulating systems composed of several qubits and a common one-dimensional waveguide. In the presented approach, the one-dimensional waveguide is modeled in real space. Thus, one can use ...
A Distillation-Teleportation Protocol for Fault-Tolerant QRAM
Alexander M. Dalzell, Andr'as Gily'en, Connor T. Hann +5 more·May 26, 2025
We present a protocol for fault-tolerantly implementing the logical quantum random access memory (QRAM) operation, given access to a specialized, noisy QRAM device. For coherently accessing classical memories of size $2^{n}$, our protocol consumes on...
Hardware-tailored logical Clifford circuits for stabilizer codes
Eric J Kuehnke, Kyano Levi, Joschka Roffe +2 more·May 26, 2025
Quantum error correction is the art of protecting fragile quantum information through suitable encoding and active interventions. After encoding $k$ logical qubits into $n>k$ physical qubits using a stabilizer code, this amounts to measuring stabiliz...