Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Information Reconciliation for Continuous-Variable Quantum Key Distribution with $β> 1$ Using Short Blocklength Error Correction Codes: Proposal and Concerns
Kadir Gümüş, João dos Reis Frazão, Aaron Albores-Mejia +5 more·Sep 20, 2024
In this paper, we introduce a reconciliation protocol with a two-step error correction scheme that uses a short-blocklength, low-rate code and a long-blocklength, high-rate code. We simulate the protocol using a short-block-length low-density parity-...
Fusion and flow: formal protocols to reliably build photonic graph states
G. Felice, Boldizsár Poór, L. Yeh +1 more·Sep 20, 2024
Photonics offers a promising platform for implementations of measurement-based quantum computing. Recently proposed fusion-based architectures aim to achieve universality and fault-tolerance. In these approaches, computation is carried out by perform...
Scalable and noise-robust communication advantage of multipartite quantum entanglement
Ananya Chakraborty, R. Patra, Kunika Agarwal +4 more·Sep 20, 2024
Distributed computing, involving multiple servers collaborating on designated computations, faces a critical challenge in optimizing inter-server communication -- an issue central to the study of communication complexity. Quantum resources offer adva...
A coherent approach to quantum-classical optimization
Andrés N. Cáliz, Jordi Riu, Josep Bosch +3 more·Sep 20, 2024
Hybrid quantum-classical optimization techniques, which incorporate the pre-optimization of Variational Quantum Algorithms using Tensor Networks, have been shown to allow for the reduction of quantum computational resources. In the particular case of...
Detecting unfaithful entanglement by multiple fidelities
Ruiqi Zhang, Zhaohui Wei·Sep 20, 2024
Certifying entanglement for unknown quantum states experimentally is a fundamental problem in quantum computing and quantum physics. Because of being easy to implement, a most popular approach for this problem in modern quantum experiments is detecti...
Local problems in trees across a wide range of distributed models
A. Dhar, Eli Kujawa, Henrik Lievonen +4 more·Sep 20, 2024
The randomized online-LOCAL model captures a number of models of computing; it is at least as strong as all of these models: - the classical LOCAL model of distributed graph algorithms, - the quantum version of the LOCAL model, - finitely dependent d...
Optimizing a parameterized controlled gate using free quaternion selection
Hiroyoshi Kurogi, Katsuhiro Endo, Yuki Sato +6 more·Sep 20, 2024
In variational quantum algorithms (VQAs), parameterization is typically applied to single-qubit gates. In this study, we instead parameterize a generalized controlled gate and propose an algorithm to locally minimize the cost function by maximally op...
Quantum computing for energy correlators
Kyle Lee, Francesco Turro, Xiaojun Yao·Sep 20, 2024
In recent years, energy correlators have emerged as powerful observables for probing the fragmentation dynamics of high-energy collisions. We introduce the first numerical strategy for calculating energy correlators using the Hamiltonian lattice appr...
Efficient fault-tolerant code switching via one-way transversal CNOT gates
Sascha Heußen, J. Hilder·Sep 20, 2024
Code switching is an established technique that facilitates a universal set of FT quantum gate operations by combining two QEC codes with complementary sets of gates, which each by themselves are easy to implement fault-tolerantly. In this work, we p...
Post-Quantum Cryptography Anonymous Scheme - PQCWC: Post-Quantum Cryptography Winternitz-Chen
Abel C. H. Chen·Sep 20, 2024
As quantum computing technology matures, it poses a threat to the security of mainstream asymmetric cryptographic methods. In response, the National Institute of Standards and Technology released the final version of post-quantum cryptographic (PQC) ...
Quantum-Assisted Joint Virtual Network Function Deployment and Maximum Flow Routing for Space Information Networks
Yu Zhang, Yanmin Gong, Lei Fan +3 more·Sep 20, 2024
Network function virtualization (NFV)-enabled space information network (SIN) has emerged as a promising method to facilitate global coverage and seamless service. This paper proposes a novel NFV-enabled SIN to provide end-to-end communication and co...
Thermal spectrometer for superconducting circuits
C. D. Satrya, Y. Chang, Aleksandr S Strelnikov +5 more·Sep 20, 2024
Superconducting circuits provide a versatile and controllable platform for studies of fundamental quantum phenomena as well as for quantum technology applications. A conventional technique to read out the state of a quantum circuit or to characterize...
Asymmetry Control in a Parametric Oscillator for the Quantum Simulation of Chemical Activation
Alejandro Cros Carrillo de Albornoz, Rodrigo G. Cortiñas, Max Schäfer +8 more·Sep 19, 2024
Dissipative tunneling remains a cornerstone effect in quantum mechanics. In chemistry, it plays a crucial role in governing the rates of chemical reactions, often modeled as the motion along the reaction coordinate from one potential well to another....
Enhancement of quantum annealing via n-local catalysts
Roopayan Ghosh, Luca A. Nutricati, Natasha Feinstein +2 more·Sep 19, 2024
The potential quantum speedup in solving optimization problems via adiabatic quantum annealing is often hindered by the closing of the energy gap during the anneal, especially when this gap scales exponentially with system size. In this work, we alle...
Entanglement-enhanced quantum sensing via optimal global control with neutral atoms in a cavity
Vineesha Srivastava, Sven Jandura, Gavin K Brennen +1 more·Sep 19, 2024
We present a deterministic protocol for the preparation of entangled states in the symmetric Dicke subspace of $N$ spins coupled to a common cavity mode that prepares entangled states useful for quantum sensing, achieving a precision significantly be...
Engineering Quantum Error Correction Codes Using Evolutionary Algorithms
Mark A. Webster, Dan E. Browne·Sep 19, 2024
Quantum error correction and the use of quantum error correction codes are likely to be essential for the realization of practical quantum computing. Because the error models of quantum devices vary widely, quantum codes that are tailored for a parti...
Dephasing in the central spin problem with long-range Ising spin-bath coupling
K. B. Attar, N. Bar-Gill·Sep 19, 2024
The study of coherence dynamics in open quantum systems, specifically addressing various physical realizations of quantum systems and environments, is a long-standing and central pillar of quantum science and technology. As such, a large body of work...
Hardware-efficient quantum error correction via concatenated bosonic qubits
Harald Putterman, Kyungjoo Noh, Connor T. Hann +118 more·Sep 19, 2024
To solve problems of practical importance1,2, quantum computers probably need to incorporate quantum error correction, in which a logical qubit is redundantly encoded in many noisy physical qubits3, 4–5. The large physical-qubit overhead associated w...
Efficient computation of topological order
Louis Fraatz, Amit Jamadagni, H. Weimer·Sep 19, 2024
We analyze the computational aspects of detecting topological order in a quantum many-body system. We contrast the widely used topological entanglement entropy with a recently introduced operational definition for topological order based on error cor...
Ultracompact Programmable Silicon Photonics Using Layers of Low-Loss Phase-Change Material Sb2Se3 of Increasing Thickness
Sophie Blundell, Tom Radford, Idris A. Ajia +6 more·Sep 19, 2024
High-performance programmable silicon photonic circuits are considered to be a critical part of next-generation architectures for optical processing, photonic quantum circuits, and neural networks. Low-loss optical phase-change materials (PCMs) offer...