Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,666 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Qudits and High-Dimensional Quantum Computing
Yuchen Wang, Zixuan Hu, B. Sanders +1 more·Jul 30, 2020
Qudit is a multi-level computational unit alternative to the conventional 2-level qubit. Compared to qubit, qudit provides a larger state space to store and process information, and thus can provide reduction of the circuit complexity, simplification...
Noise Reduction in Qubit Readout with a Two-Mode Squeezed Interferometer
G. Liu, X. Cao, T. Chien +3 more·Jul 30, 2020
Fault-tolerant quantum information processing with flawed qubits and gates requires highly efficient, quantum non-demolition (QND) qubit readout. In superconducting circuits, qubit readout using coherent light with fidelity above 99% has been achieve...
Optimal Layout Synthesis for Quantum Computing
Daniel Bochen Tan, J. Cong·Jul 30, 2020
Recent years have witnessed the fast development of quantum computing. Researchers around the world are eager to run larger and larger quantum algorithms that promise speedups impossible to any classical algorithm. However, the available quantum comp...
Quantum state verification in the quantum linear systems problem
R. Somma, Yiğit Subaşı·Jul 30, 2020
We analyze the complexity of quantum state verification in the context of solving systems of linear equations of the form $A \vec x = \vec b$. We show that any quantum operation that verifies whether a given quantum state is within a constant distanc...
Experimental semi-autonomous eigensolver using reinforcement learning
ComputationsVictor Y. Pan, M. Hao, N. Barraza +2 more·Jul 30, 2020
The characterization of observables, expressed via Hermitian operators, is a crucial task in quantum mechanics. For this reason, an eigensolver is a fundamental algorithm for any quantum technology. In this work, we implement a semi-autonomous algori...
Sufficient conditions for adiabaticity in open quantum systems
Alan C. Santos, M. S. Sarandy·Jul 29, 2020
The adiabatic approximation exhibits wide applicability in quantum mechanics, providing a simple approach for nontransitional dynamics in quantum systems governed by slowly varying time-dependent Hamiltonians. However, the standard adiabatic theorem ...
Quantum-enhanced algorithms for classical target detection in complex environments
P. Weichman·Jul 29, 2020
Quantum computational approaches to some classic target identification and localization algorithms, especially for radar images, are investigated, and are found to raise a number of quantum statistics and quantum measurement issues with much broader ...
Quantum algorithm for online convex optimization
Jianhao He, Feidiao Yang, Jialin Zhang +1 more·Jul 29, 2020
We explore whether quantum advantages can be found for the zeroth-order online convex optimization (OCO) problem, which is also known as bandit convex optimization with multi-point feedback. In this setting, given access to zeroth-order oracles (that...
Quantifying the Efficiency of State Preparation via Quantum Variational Eigensolvers
G. Matos, S. Johri, Z. Papi'c·Jul 28, 2020
Recently, there has been much interest in the efficient preparation of complex quantum states using low-depth quantum circuits, such as Quantum Approximate Optimization Algorithm (QAOA). While it has been numerically shown that such algorithms prepar...
Quantum computing model of an artificial neuron with continuously valued input data
Stefano Mangini, F. Tacchino, D. Gerace +2 more·Jul 28, 2020
Artificial neural networks have been proposed as potential algorithms that could benefit from being implemented and run on quantum computers. In particular, they hold promise to greatly enhance Artificial Intelligence tasks, such as image elaboration...
Quantum-soft QUBO Suppression for Accurate Object Detection
Junde Li, Swaroop Ghosh·Jul 28, 2020
Non-maximum suppression (NMS) has been adopted by default for removing redundant object detections for decades. It eliminates false positives by only keeping the image M with highest detection score and images whose overlap ratio with M is less than ...
Enhanced Quantum Key Distribution using Hybrid Channels and Natural Random Numbers
Hemant Rana, Nitin Verma·Jul 28, 2020
Since the introduction of quantum computation by Richard Feynman in 1982, Quantum computation has shown exemplary results in various applications of computer science including unstructured database search, factorization, molecular simulations to name...
Quantum computing enhanced computational catalysis
Vera von Burg, G. Low, Thomas Häner +4 more·Jul 28, 2020
The quantum computation of electronic energies can break the curse of dimensionality that plagues many-particle quantum mechanics. It is for this reason that a universal quantum computer has the potential to fundamentally change computational chemist...
Noise-induced barren plateaus in variational quantum algorithms
Samson Wang, Enrico Fontana, M. Cerezo +4 more·Jul 28, 2020
Variational Quantum Algorithms (VQAs) may be a path to quantum advantage on Noisy Intermediate-Scale Quantum (NISQ) computers. A natural question is whether noise on NISQ devices places fundamental limitations on VQA performance. We rigorously prove ...
Polyadic Quantum Classifier
William Cappelletti, Rebecca Erbanni, J. Keller·Jul 28, 2020
We introduce here a supervised quantum machine learning algorithm for multi-class classification on NISQ architectures. A parametric quantum circuit is trained to output a specific bit string corresponding to the class of the input datapoint. We trai...
Witness of topological phase transition and Weyl points in an open topological system
M. Weng, Weijun Cheng, Zhihai Wang +1 more·Jul 27, 2020
Recently, the tunable Weyl-semimetal bands and the associate topological phase transition have been successfully simulated in superconducting quantum circuits [X. Tan, \textit{et al.} Phys. Rev. Lett. {\bf 122}, 010501 (2019)]. Since the superconduct...
Quantum Embedded Superstates
N. Nefedkin, A. Alú, A. Krasnok·Jul 27, 2020
Optical supercavity modes (superstates), i.e., hybrid modes emerging from the strong coupling of two modes of an open cavity, can support ultranarrow lines in their scattering spectra associated with quasi bound states in the continuum (quasi‐BIC). T...
Observation of Two-Vertex Four-Dimensional Spin Foam Amplitudes with a 10-qubit Superconducting Quantum Processor
Pengfei Zhang, Zichang Huang, Chao Song +8 more·Jul 27, 2020
Quantum computers are an increasingly hopeful means for understanding large quantum many-body systems bearing high computational complexity. Such systems exhibit complex evolutions of quantum states, and are prevailing in fundamental physics, e.g., q...
Dominant Reaction Pathways by Quantum Computing.
P. Hauke, Giovanni Mattiotti, P. Faccioli·Jul 27, 2020
Characterizing thermally activated transitions in high-dimensional rugged energy surfaces is a very challenging task for classical computers. Here, we develop a quantum annealing scheme to solve this problem. First, the task of finding the most proba...
Verification of graph states in an untrusted network
Anupama Unnikrishnan, D. Markham·Jul 26, 2020
Graph states are a large class of multipartite entangled quantum states that form the basis of schemes for quantum computation, communication, error correction, metrology, and more. In this work, we consider verification of graph states generated by ...