Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
How Much Entanglement Is Needed for Quantum Error Correction?
S. Bravyi, Dongjin Lee, Zhi Li +1 more·May 2, 2024
It is commonly believed that logical states of quantum error-correcting codes have to be highly entangled such that codes capable of correcting more errors require more entanglement to encode a qubit. Here, we show that the validity of this belief de...
Spanning Tree Matching Decoder for Quantum Surface Codes
Diego Forlivesi, L. Valentini, M. Chiani·May 2, 2024
We introduce the spanning tree matching (STM) decoder for surface codes, which guarantees the error correction capability up to the code’s designed distance by first employing an instance of the minimum spanning tree on a subset of ancilla qubits wit...
Continuous-variable quantum kernel method on a programmable photonic quantum processor
Keitaro Anai, Shion Ikehara, Yoshichika Yano +2 more·May 2, 2024
Among various quantum machine learning (QML) algorithms, the quantum kernel method has especially attracted attention due to its compatibility with noisy intermediate-scale quantum devices and its potential to achieve quantum advantage. This method p...
On Quantum Ambiguity and Potential Exponential Computational Speed-Ups to Solving Dynamic Asset Pricing Models
Eric Ghysels, Jack Morgan·May 2, 2024
We formulate quantum computing solutions to a large class of dynamic nonlinear asset pricing models using algorithms, in theory exponentially more efficient than classical ones, which leverage the quantum properties of superposition and entanglement....
Generalising quantum imaginary time evolution to solve linear partial differential equations
Swagat Kumar, C. Wilmott·May 2, 2024
The quantum imaginary time evolution (QITE) methodology was developed to overcome a critical issue as regards non-unitarity in the implementation of imaginary time evolution on a quantum computer. QITE has since been used to approximate ground states...
Digital-analog counterdiabatic quantum optimization with trapped ions
Shubham Kumar, N. N. Hegade, Alejandro Gomez-Cadavid +3 more·May 2, 2024
We introduce a hardware-specific, problem-dependent digital-analog quantum algorithm of a counterdiabatic quantum dynamics tailored for optimization problems. Specifically, we focus on trapped-ion architectures, taking advantage from global Mølmer–Sø...
Quantum wave packet transforms with compact frequency support
Hongkang Ni, Lexing Ying·May 2, 2024
Different kinds of wave packet transforms are widely used for extracting multi-scale structures in signal processing tasks. This paper introduces the quantum circuit implementation of a broad class of wave packets, including Gabor atoms and wavelets,...
Quantum Machine Learning: Quantum Kernel Methods
S. Naguleswaran·May 2, 2024
Quantum algorithms based on quantum kernel methods have been investigated previously [1]. A quantum advantage is derived from the fact that it is possible to construct a family of datasets for which, only quantum processing can recognise the intrinsi...
High-Frequency Tails in Spectral Densities
R. Korol, Xinxian Chen, Ignacio Franco·May 2, 2024
Recent advances in numerically exact quantum dynamics methods have brought the dream of accurately modeling the dynamics of chemically complex open systems within reach. Path-integral-based methods, hierarchical equations of motion, and quantum analo...
Distribution of Non-Locality On Quantum Random Circuits
A. Arango, F. Holik, R. Giuntini +2 more·May 2, 2024
In this work we explore how different types of resources are distributed among the states generated by quantum random circuits (QRC). We focus on multipartite non-locality, but we also analyze quantum correlations by appealing to different entangleme...
On-demand shaped-photon emission based on a parametrically modulated qubit
Xiang Li, Sheng-Yong Li, Si-Lu Zhao +13 more·May 2, 2024
In the circuit quantum electrodynamics architectures, to realize a long-range quantum network mediated by flying photon, it is necessary to shape the temporal profile of emitted photons to achieve high transfer efficiency between two quantum nodes. I...
QSimPy: A Learning-centric Simulation Framework for Quantum Cloud Resource Management
H. T. Nguyen, Muhammad Usman, R. Buyya·May 2, 2024
Quantum cloud computing is an emerging computing paradigm that allows seamless access to quantum hardware as cloud-based services. However, effective use of quantum resources is challenging and necessitates robust simulation frameworks for effective ...
Multivariate trace estimation using quantum state space linear algebra
L. Yosef, Shashanka Ubaru, L. Horesh +1 more·May 2, 2024
In this paper, we present a quantum algorithm for approximating multivariate traces, i.e. the traces of matrix products. Our research is motivated by the extensive utility of multivariate traces in elucidating spectral characteristics of matrices, as...
Driven multiphoton qubit-resonator interactions
M. Ayyash, Xicheng Xu, S. Ashhab +1 more·May 2, 2024
We develop a general theory for multiphoton qubit-resonator interactions enhanced by a qubit drive. The interactions generate qubit-conditional operations in the resonator when the driving is near $n$-photon cross-resonance, namely, the qubit drive i...
Quantum Repeater Protocol using Quantum Error Correction for Distillation
Ashlesha Patil, Michele Pacenti, Bane Vasić +2 more·May 1, 2024
Bell-state measurement (BSM) on entangled states shared between quantum repeaters is the fundamental operation used to route entanglement in quantum networks. Performing BSMs on Werner states shared between repeaters leads to exponential decay in the...
Classically Spoofing System Linear Cross Entropy Score Benchmarking
Andrew Tanggara, Mile Gu, Kishor Bharti·May 1, 2024
In recent years, several experimental groups have claimed demonstrations of ``quantum supremacy'' or computational quantum advantage. A notable first claim by Google Quantum AI revolves around a metric called the Linear Cross Entropy Benchmarking (Li...
Entanglement and fidelity across quantum phase transitions in locally perturbed topological codes with open boundaries
Harikrishnan K J, Amit Kumar Pal·May 1, 2024
We investigate the topological-to-non-topological quantum phase transitions (QPTs) occurring in the Kitaev code under local perturbations in the form of local magnetic field and spin-spin interactions of the Ising-type using fidelity susceptibility (...
Schwinger–Keldysh nonperturbative field theory of open quantum systems beyond the Markovian regime: application to spin-boson and spin-chain-boson models
Felipe Reyes-Osorio, Federico García-Gaitán, David J Strachan +3 more·May 1, 2024
We develop a unified framework for open quantum systems composed of many mutually interacting quantum spins, or any isomorphic systems like qubits and qudits, surrounded by one or more independent bosonic baths. Our framework, based on Schwinger–Keld...
SHARE: Secure Hardware Allocation and Resource Efficiency in Quantum Systems
S. Upadhyay, Swaroop Ghosh·May 1, 2024
Quantum computing (QC) is poised to revolutionize problem-solving across various fields, with research suggesting that systems with over 50 qubits may achieve quantum advantage-surpassing supercomputers in certain optimization tasks. As the hardware ...
An RNN–policy gradient approach for quantum architecture search
Gang Wang, Banghai Wang, Shao-Ming Fei·May 1, 2024
Variational quantum circuits are one of the promising ways to exploit the advantages of quantum computing in the noisy intermediate-scale quantum technology era. The design of the quantum circuit architecture might greatly affect the performance capa...