Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,611
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Research Volume
15,669 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
No-Go Theorems for Quantum Resource Purification: New Approach and Channel Theory
K. Fang, Zi-Wen Liu·Oct 22, 2020
It is recently shown that there exist fundamental limits to the accuracy and efficiency of purifying generic noisy resource states in any well-behaved quantum resource theory [Fang/Liu, Phys. Rev. Lett. 125, 060405 (2020)]. Here, we develop a novel a...
On the Compressed-Oracle Technique, and Post-Quantum Security of Proofs of Sequential Work
Kai-Min Chung, S. Fehr, Yu-Hsuan Huang +1 more·Oct 22, 2020
We revisit the so-called compressed oracle technique, introduced by Zhandry for analyzing quantum algorithms in the quantum random oracle model (QROM). To start off with, we offer a concise exposition of the technique, which easily extends to the par...
Secure Software Leasing from Standard Assumptions
Fuyuki Kitagawa, R. Nishimaki, Takashi Yamakawa·Oct 21, 2020
Secure software leasing (SSL) is a quantum cryptographic primitive that enables users to execute software only during the software is leased. It prevents users from executing leased software after they return the leased software to its owner. SSL can...
Promoting quantum correlations in DQC1 model via post-selection
E. Goettems, T. O. Maciel, D. Soares-Pinto +1 more·Oct 21, 2020
The deterministic quantum computation with one qubit (DQC1) model is a restricted model of quantum computing able to calculate efficiently the normalized trace of a unitary matrix. In this work we analyse the quantum correlations named entanglement, ...
Ultrasensitive Calorimetric Detection of Single Photons from Qubit Decay
J. Pekola, B. Karimi·Oct 21, 2020
We describe a qubit linearly coupled to a heat bath, either directly or via a cavity. The main focus of the paper is on calorimetric detection in a realistic circuit, specifically a solid-state qubit coupled to a resistor as an absorber. The bath in ...
Quantum tomography of an entangled three-qubit state in silicon
K. Takeda, A. Noiri, T. Nakajima +3 more·Oct 20, 2020
Quantum entanglement is a fundamental property of coherent quantum states and an essential resource for quantum computing1. In large-scale quantum systems, the error accumulation requires concepts for quantum error correction. A first step toward err...
Adaptive bandwidth management for entanglement distribution in quantum networks
Navin B. Lingaraju, Hsuan-Hao Lu, Suparna Seshadri +3 more·Oct 20, 2020
Flexible-grid wavelength-division multiplexing is a powerful tool in lightwave communications for maximizing spectral efficiency. In the emerging field of quantum networking, the need for effective resource provisioning is particularly acute, given t...
Variational quantum algorithm for estimating the quantum Fisher information
J. Beckey, M. Cerezo, A. Sone +1 more·Oct 20, 2020
The Quantum Fisher information (QFI) quantifies the ultimate precision of estimating a parameter from a quantum state, and can be regarded as a reliability measure of a quantum system as a quantum sensor. However, estimation of the QFI for a mixed st...
Optical Signatures of Defect Centers in Transition Metal Dichalcogenide Monolayers
Pedro Miguel M. C. de Melo, Z. Zanolli, M. Verstraete·Oct 20, 2020
Even the best quality 2D materials have non‐negligible concentrations of vacancies and impurities. It is critical to understand and quantify how defects change intrinsic properties, and use this knowledge to generate functionality. This challenge can...
Implementing Bilinear Interpolation on Quantum Images
Fei Yan, Shan Zhao, S. Venegas-Andraca·Oct 20, 2020
In this paper, we present an interpolation scheme for FRQI images based on bilinear interpolation. To accomplish this, we formulated several quantum modules, i.e., assignment module, increment module, and quarter module, and suffused them into our pr...
Quantum Coding with Low-Depth Random Circuits
M. Gullans, Stefan Krastanov, D. Huse +2 more·Oct 19, 2020
Random quantum circuits have played a central role in establishing the computational advantages of near-term quantum computers over their conventional counterparts. Here, we use ensembles of low-depth random circuits with local connectivity in $D\ge ...
Introduction to the Pontryagin Maximum Principle for Quantum Optimal Control
U. Boscain, M. Sigalotti, D. Sugny·Oct 19, 2020
Optimal Control Theory is a powerful mathematical tool, which has known a rapid development since the 1950s, mainly for engineering applications. More recently, it has become a widely used method to improve process performance in quantum technologies...
Fast simulation of quantum algorithms using circuit optimization
G. Guerreschi·Oct 19, 2020
Classical simulators play a major role in the development and benchmark of quantum algorithms and practically any software framework for quantum computation provides the option of running the algorithms on simulators. However, the development of quan...
Optimizing radiotherapy plans for cancer treatment with Tensor Networks
Samuele Cavinato, Timo Felser, M. Fusella +2 more·Oct 19, 2020
We present a novel application of Tensor Network methods in cancer treatment as a potential tool to solve the dose optimization problem in radiotherapy. In particular, the intensity-modulated radiation therapy technique—that allows treating irregular...
Error correction of a logical grid state qubit by dissipative pumping
B. de Neeve, T. Nguyen, T. Behrle +1 more·Oct 19, 2020
Stabilization of encoded logical qubits using quantum error correction is crucial for the realization of reliable quantum computers. Although error-correcting codes implemented using individual physical qubits require many separate systems to be cont...
Abrupt transitions in variational quantum circuit training
E. Campos, A. Nasrallah, J. Biamonte·Oct 19, 2020
Variational quantum algorithms dominate gate-based applications of modern quantum processors. The so called, {\it layer-wise trainability conjecture} appears in various works throughout the variational quantum computing literature. The conjecture ass...
Bayesian Quantum Multiphase Estimation Algorithm
Valentin Gebhart, A. Smerzi, L. Pezzè·Oct 18, 2020
Quantum phase estimation (QPE) is the key subroutine of several quantum computing algorithms as well as a central ingredient in quantum computational chemistry and quantum simulation. While QPE strategies have focused on the estimation of a single ph...
Adaptive Circuit Learning for Quantum Metrology
Ziqi Ma, P. Gokhale, Tian-Xing Zheng +5 more·Oct 17, 2020
Quantum sensing is an important application of emerging quantum technologies. We explore whether a hybrid system of quantum sensors and quantum circuits can surpass the classical limit of sensing. In particular, we use optimization techniques to sear...
Bosonic quantum error correction codes in superconducting quantum circuits
W. Cai, Yuwei Ma, Wei Wang +2 more·Oct 17, 2020
Quantum information is vulnerable to environmental noise and experimental imperfections, hindering the reliability of practical quantum information processors. Therefore, quantum error correction (QEC) that can protect quantum information against noi...
Measurement Error Mitigation for Variational Quantum Algorithms
George S. Barron, C. J. Wood·Oct 16, 2020
Variational Quantum Algorithms (VQAs) are a promising application for near-term quantum processors, however the quality of their results is greatly limited by noise. For this reason, various error mitigation techniques have emerged to deal with noise...