Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,509 papers in 12 months (-19% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Relaxed Peephole Optimization: A Novel Compiler Optimization for Quantum Circuits
Ji Liu, Luciano Bello, Huiyang Zhou·Dec 14, 2020
As in classical computing, compilers play an important role in quantum computing. Quantum processors typically support a limited set of primitive operations or quantum gates and have certain hardware-related limitations. A quantum compiler is respons...
Variational quantum algorithms for trace distance and fidelity estimation
Ranyiliu Chen, Zhixin Song, Xuanqiang Zhao +1 more·Dec 10, 2020
Estimating the difference between quantum data is crucial in quantum computing. However, as typical characterizations of quantum data similarity, the trace distance and quantum fidelity are believed to be exponentially-hard to evaluate in general. In...
Correlated charge noise and relaxation errors in superconducting qubits
C. Wilen, S. Abdullah, N. Kurinsky +19 more·Dec 10, 2020
The central challenge in building a quantum computer is error correction. Unlike classical bits, which are susceptible to only one type of error, quantum bits (qubits) are susceptible to two types of error, corresponding to flips of the qubit state a...
How to enhance quantum generative adversarial learning of noisy information
Paolo Braccia, F. Caruso, L. Banchi·Dec 10, 2020
Quantum machine learning is where nowadays machine learning (ML) meets quantum information science. In order to implement this new paradigm for novel quantum technologies, we still need a much deeper understanding of its underlying mechanisms, before...
Experimental Realization of Quantum Darwinism State on Quantum Computers.
Rakesh Saini, B. K. Behera·Dec 10, 2020
It is well-known that decoherence is a crucial barrier in realizing various quantum information processing tasks; on the other hand, it plays a pivotal role in explaining how a quantum system's fragile state leads to the robust classical state. Zurek...
Quantum Advantage with Timestamp Membosonsampling
Jun Gao, Xiao-Wei Wang, Wenhao Zhou +10 more·Dec 7, 2020
Quantum computer, harnessing quantum superposition to boost a parallel computational power, promises to outperform its classical counterparts and offer an exponentially increased scaling. The term "quantum advantage" was proposed to mark the key poin...
Quantum Internet: The Future of Internetworking
A. Abelém, D. Towsley, Gayane Vardoyan·Dec 7, 2020
Quantum information, computation and communication, will have a great impact on our world. One important subfield will be quantum networking and the quantum Internet. The purpose of a quantum Internet is to enable applications that are fundamentally ...
Query Complexity of Unitary Operation Discrimination
Xiao-Wei Huang, Lvzhou Li·Dec 5, 2020
Discrimination of unitary operations is fundamental in quantum computation and information. A lot of quantum algorithms including the well-known Deutsch-Jozsa algorithm, Simon algorithm, and Grover algorithm can essentially be regarded as discriminat...
Efficient Algorithms for Causal Order Discovery in Quantum Networks
Ge Bai, Yadong Wu, Yan Zhu +2 more·Dec 3, 2020
Given black-box access to the input and output systems, we develop the first efficient quantum causal order discovery algorithm with polynomial query complexity with respect to the number of systems. We model the causal order with quantum combs, and ...
Anyonic Partial Transpose I: Quantum Information Aspects.
Hassan Shapourian, Roger S. K. Mong, S. Ryu·Dec 3, 2020
A basic diagnostic of entanglement in mixed quantum states is known as the partial transpose and the corresponding entanglement measure is called the logarithmic negativity. Despite the great success of logarithmic negativity in characterizing bosoni...
Floquet engineering of continuous-time quantum walks: Toward the simulation of complex and next-nearest-neighbor couplings
Leonardo Novo, S. Ribeiro·Dec 1, 2020
The formalism of continuous-time quantum walks on graphs has been widely used in the study of quantum transport of energy and information, as well as in the development of quantum algorithms. In experimental settings, however, there is limited contro...
All-optical long-distance quantum communication with Gottesman-Kitaev-Preskill qubits
Kosuke Fukui, R. N. Alexander, P. van Loock·Nov 30, 2020
Quantum repeaters are a promising platform for realizing long-distance quantum communication and thus could form the backbone of a secure quantum internet, a scalable quantum network, or a distributed quantum computer. Repeater protocols that encode ...
Quantum repeaters based on concatenated bosonic and discrete-variable quantum codes
F. Rozpędek, Kyungjoo Noh, Qiang-Da Xu +2 more·Nov 30, 2020
We propose an architecture of quantum-error-correction-based quantum repeaters that combines techniques used in discrete- and continuous-variable quantum information. Specifically, we propose to encode the transmitted qubits in a concatenated code co...
Experimental Detection of the Correlation Rényi Entropy in the Central Spin Model.
Mohamad Niknam, L. F. Santos, D. Cory·Nov 27, 2020
We propose and experimentally measure an entropy that quantifies the volume of correlations among qubits. The experiment is carried out on a nearly isolated quantum system composed of a central spin coupled and initially uncorrelated with 15 other sp...
Cosine series quantum sampling method with applications in signal and image processing
Kamil Wereszczy'nski, A. Michalczuk, Damian Pkeszor +3 more·Nov 25, 2020
A novel family of Cosine series Quantum Sampling (QCoSamp) operators appropriate for quantum computing is described. The development of quantum algorithms, analogous to classical algorithms, we apply to the harmonic analysis of signals. We show quant...
Quantization of Blackjack: Quantum Basic Strategy and Advantage
Yushi Mura, Hiroki Wada·Nov 24, 2020
Quantum computers that process information by harnessing the remarkable power of quantum mechanics are increasingly being put to practical use. In the future, their impact will be felt in numerous fields, including in online casino games. This is o...
Particle Track Classification Using Quantum Associative Memory
L. Ice, G. Quiroz, Andrea Delgado +1 more·Nov 24, 2020
Pattern recognition algorithms are commonly employed to simplify the challenging and necessary step of track reconstruction in sub-atomic physics experiments. Aiding in the discrimination of relevant interactions, pattern recognition seeks to acceler...
The Quantum Rashomon Effect: A Strengthened Frauchiger-Renner Argument
Jochen Szangolies·Nov 23, 2020
The Frauchiger-Renner argument aims to show that `quantum theory cannot consistently describe the use of itself': in many-party settings where agents are themselves subject to quantum experiments, agents may make predictions that contradict observati...
Robust Shadow Estimation
Senrui Chen, Wenjun Yu, Pei Zeng +1 more·Nov 19, 2020
Efficiently estimating properties of large and strongly coupled quantum systems is a central focus in many-body physics and quantum information theory. While quantum computers promise speedups for many such tasks, near-term devices are prone to noise...
Reservoir Computing Approach to Quantum State Measurement
Gerasimos Angelatos, S. Khan, H. Türeci·Nov 19, 2020
Rapid and accurate quantum state measurement is important for maximizing the extracted information from a quantum system. Its optimization plays a critical role in particular for multi-qubit quantum processors deployed for NISQ-era quantum algorithms...