Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Variational quantum simulation using non-Gaussian continuous-variable systems
Paolo Stornati, Antonio Acín, Ulysse Chabaud +3 more·Oct 24, 2023
This work introduces an approach to quantum simulation by leveraging continuous-variable systems within a photonic hardware-inspired framework. The primary focus is on simulating static properties of the ground state of Hamiltonians associated with i...
Linear Decomposition of Approximate Multicontrolled Single Qubit Gates
Jefferson D. S. Silva, Thiago Melo D. Azevedo, Israel F. Araujo +1 more·Oct 23, 2023
We provide a method for compiling approximate multicontrolled single qubit gates into quantum circuits. Without ancilla qubits, the total number of elementary gates to decompose an n-qubit multicontrolled gate is proportional to 32n elementary operat...
Check-Agnosia based Post-Processor for Message-Passing Decoding of Quantum LDPC Codes
Julien du Crest, F. García-Herrero, M. Mhalla +2 more·Oct 23, 2023
The inherent degeneracy of quantum low-density parity-check codes poses a challenge to their decoding, as it significantly degrades the error-correction performance of classical message-passing decoders. To improve their performance, a post-processin...
Engineered dissipation to mitigate barren plateaus
Antonio Sannia, F. Tacchino, I. Tavernelli +2 more·Oct 23, 2023
Variational quantum algorithms represent a powerful approach for solving optimization problems on noisy quantum computers, with a broad spectrum of potential applications ranging from chemistry to machine learning. However, their performances in prac...
Quantum phase transitions and cat states in cavity-coupled quantum dots
Valerii K. Kozin, D. Miserev, D. Loss +1 more·Oct 23, 2023
We study double quantum dots coupled to a quasistatic cavity mode with high mode-volume compression allowing for strong light-matter coupling. Besides the cavity-mediated interaction, electrons in different double quantum dots interact with each othe...
How to choose a decoder for a fault-tolerant quantum computer? The speed vs accuracy trade-off
Nicolas Delfosse, A. Paz, Alexander Vaschillo +1 more·Oct 23, 2023
Achieving practical quantum advantage requires a classical decoding algorithm to identify and correct faults during computation. This classical decoding algorithm must deliver both accuracy and speed, but in what combination? When is a decoder"fast e...
Boundary scattering tomography of the Bose Hubbard model on general graphs
Abhi Saxena, E. Abbasgholinejad, Arka Majumdar +1 more·Oct 22, 2023
Correlated quantum many-body phenomena in lattice models have been identified as a set of physically interesting problems that cannot be solved classically. Analog quantum simulators, in photonics and microwave superconducting circuits, have emerged ...
With a Few Square Roots, Quantum Computing Is as Easy as Pi
J. Carette, C. Heunen, R. Kaarsgaard +1 more·Oct 21, 2023
Rig groupoids provide a semantic model of Π, a universal classical reversible programming language over finite types. We prove that extending rig groupoids with just two maps and three equations about them results in a model of quantum computing that...
Tensorized Pauli decomposition algorithm
Lukas Hantzko, Lennart Binkowski, Sabhyata Gupta·Oct 20, 2023
This paper introduces a novel general-purpose algorithm for Pauli decomposition that employs matrix slicing and addition rather than expensive matrix multiplication, significantly accelerating the decomposition of multi-qubit matrices. In a detailed ...
Efficient General Waveform Catching by a cavity at a Virtual Absorbing Exceptional Point
Asaf Farhi, Wei Dai, Seunghwi Kim +2 more·Oct 20, 2023
State transfer and photon detection are fundamental processes that have direct implications in fields such as quantum computing and photonic circuits. However, while naturally emitted photons decay exponentially in time, to perfectly capture a photon...
Gottesman-Kitaev-Preskill Encoding in Continuous Modal Variables of Single Photons.
Éloi Descamps, Arne Keller, P. Milman·Oct 19, 2023
GKP states, introduced by Gottesman, Kitaev, and Preskill, are continuous variable logical qubits that can be corrected for errors caused by phase space displacements. Their experimental realization is challenging, in particular, using propagating fi...
Quantum computer error structure probed by quantum error correction syndrome measurements
S. Gicev, L. Hollenberg, Muhammad Usman·Oct 19, 2023
With quantum devices rapidly approaching qualities and scales needed for fault tolerance, the validity of simplified error models underpinning the study of quantum error correction needs to be experimentally evaluated. In this work, we have assessed ...
Continuous-variable quantum computation of the O(3) model in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math> dimensions
Raghav G. Jha, Felix Ringer, G. Siopsis +1 more·Oct 19, 2023
We formulate the $O(3)$ non-linear sigma model in 1+1 dimensions as a limit of a three-component scalar field theory restricted to the unit sphere in the large squeezing limit. This allows us to describe the model in terms of the continuous variable ...
Pre-optimizing variational quantum eigensolvers with tensor networks
Abid Khan, Bryan K. Clark, N. Tubman·Oct 19, 2023
The variational quantum eigensolver (VQE) is a promising algorithm for demonstrating quantum advantage in the noisy intermediate-scale quantum (NISQ) era. However, optimizing VQE from random initial starting parameters is challenging due to a variety...
Quantum Annealing Solutions for the Closest String Problem with D-Wave Systems
Chandeepa Dissanayake·Oct 19, 2023
The Closest String Problem is an NP-complete problem which appears more commonly in bioinformatics and coding theory. Less surprisingly, classical approaches have been pursued with two prominent algorithms being the genetic algorithm and simulated an...
Redundant string symmetry-based error correction: Demonstrations on quantum devices
Zhangjie Qin, Daniel Azses, E. Sela +2 more·Oct 19, 2023
Computational power in measurement-based quantum computing stems from the symmetry-protected topological (SPT) order of entangled resource states. However, resource states are prone to preparation errors. We introduce a quantum error correction appro...
Generalized Quantum Data-Syndrome Codes and Belief Propagation Decoding for Phenomenological Noise
Kao-Yueh Kuo, Ching-Yi Lai·Oct 19, 2023
Quantum stabilizer codes often struggle with syndrome errors due to measurement imperfections. Typically, multiple rounds of syndrome extraction are employed to ensure reliable error information. In this paper, we consider phenomenological decoding p...
Native Two-Qubit Gates in Fixed-Coupling, Fixed-Frequency Transmons Beyond Cross-Resonance Interaction
K. X. Wei, I. Lauer, E. Pritchett +3 more·Oct 18, 2023
Fixed-frequency superconducting qubits demonstrate remarkable success as platforms for stable and scalable quantum computing. Cross-resonance gates have been the workhorse of fixed-coupling, fixed-frequency superconducting processors, leveraging the ...
A hyperparameter study for quantum kernel methods
Sebastian Egginger, Alona Sakhnenko, J. Lorenz·Oct 18, 2023
Quantum kernel methods are a promising method in quantum machine learning thanks to the guarantees connected to them. Their accessibility for analytic considerations also opens up the possibility of prescreening datasets based on their potential for ...
Genuine Multipartite Entanglement Detection with Imperfect Measurements: Concept and Experiment.
H. Cao, Simon Morelli, L. Rozema +3 more·Oct 18, 2023
Standard procedures for entanglement detection assume that experimenters can exactly implement specific quantum measurements. Here, we depart from such idealizations and investigate, in both theory and experiment, the detection of genuine multipartit...