Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,749 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
On the natural gradient for variational quantum eigensolver
N. Yamamoto·Sep 11, 2019
The variational quantum eigensolver is a hybrid algorithm composed of quantum state driving and classical parameter optimization, for finding the ground state of a given Hamiltonian. The natural gradient method is an optimization method taking into a...
Parallel in time dynamics with quantum annealers
Konrad Jalowiecki, A. Więckowski, P. Gawron +1 more·Sep 11, 2019
Recent years have witnessed an unprecedented increase in experiments and hybrid simulations involving quantum computers. In particular, quantum annealers. There exist a plethora of algorithms promising to outperform classical computers in the near-te...
Benchmarking Noise Extrapolation with OpenPulse
J. Garmon, R. Pooser, E. Dumitrescu·Sep 11, 2019
Distilling precise estimates from noisy intermediate scale quantum (NISQ) data has recently attracted considerable attention. In order to augment digital qubit metrics, such as gate fidelity, we discuss analog error mitigability, i.e. the ability to ...
Exact and Practical Pattern Matching for Quantum Circuit Optimization
Raban Iten, Romain Moyard, Tony Metger +2 more·Sep 11, 2019
Quantum computations are typically performed as a sequence of basic operations, called quantum gates. Different gate sequences, called quantum circuits, can implement the same overall quantum computation. Since every additional quantum gate takes tim...
End-to-End Quantum Secured Inter-Domain 5G Service Orchestration Over Dynamically Switched Flex-Grid Optical Networks Enabled by a q-ROADM
Rui Wang, Qibing Wang, G. Kanellos +10 more·Sep 10, 2019
Dynamic and flexible optical networking combined with virtualization and softwarisation enabled by network function virtualization (NFV) and software defined networking (SDN) are the key technology enablers for supporting the dynamicity, bandwidth, a...
Noise-robust exploration of quantum matter on near-term quantum devices
J. Borregaard, M. Christandl, Daniel Stilck Francca·Sep 10, 2019
We describe a resource-efficient approach to studying many-body quantum states on noisy, intermediate-scale quantum devices. We employ a sequential generation model that allows to bound the range of correlations in the resulting many-body quantum sta...
Studying Qubit Interactions with Multimode Cavities Using QuTiP
S. Shreeram·Sep 10, 2019
The project uses QuTiP, a quantum computing framework, to simulate interactions between two-qubits coupled with each other via three resonators. The main aim of this project is to build machinery of techniques to understand complex qubit-cavity inter...
Variational algorithms for linear algebra.
Xiaosi Xu, Jinzhao Sun, Suguru Endo +3 more·Sep 9, 2019
Quantum algorithms have been developed for efficiently solving linear algebra tasks. However, they generally require deep circuits and hence universal fault-tolerant quantum computers. In this work, we propose variational algorithms for linear algebr...
A quantum search decoder for natural language processing
Johannes Bausch, Sathyawageeswar Subramanian, Stephen Piddock·Sep 9, 2019
Probabilistic language models, e.g. those based on recurrent neural networks such as long short-term memory models (LSTMs), often face the problem of finding a high probability prediction from a sequence of random variables over a set of tokens. This...
On the universality of the quantum approximate optimization algorithm
Mauro E. S. Morales, J. Biamonte, Z. Zimborás·Sep 6, 2019
The quantum approximate optimization algorithm (QAOA) is considered to be one of the most promising approaches towards using near-term quantum computers for practical application. In its original form, the algorithm applies two different Hamiltonians...
Optimizing Clifford gate generation for measurement-only topological quantum computation with Majorana zero modes
Alan Tran, Alex Bocharov, B. Bauer +1 more·Sep 6, 2019
One of the main challenges for quantum computation is that while the number of gates required to perform a non-trivial quantum computation may be very large, decoherence and errors in realistic quantum architectures limit the number of physical gate ...
Measurement on quantum devices with applications to time-dependent density functional theory
Jun Yang, James Brown, J. Whitfield·Sep 6, 2019
Quantum algorithms are touted as a way around some classically intractable problems such as the simulation of quantum mechanics. At the end of all quantum algorithms is a quantum measurement whereby classical data is extracted and utilized. In fact, ...
QCOR
Tiffany M. Mintz, A. McCaskey, E. Dumitrescu +3 more·Sep 5, 2019
Quantum computing (QC) is an emerging computational paradigm that leverages the laws of quantum mechanics to perform elementary logic operations. Existing programming models for QC were designed with fault-tolerant hardware in mind, envisioning stand...
Robust quantum control in games: An adversarial learning approach
Xiaozhen Ge, Haijin Ding, H. Rabitz +1 more·Sep 5, 2019
High-precision operation of quantum computing systems must be robust to uncertainties and noises in the quantum hardware. In this paper, we show that through a game played between the uncertainties (or noises) and the controls, adversarial uncertaint...
Quantum classifier with tailored quantum kernel
Carsten Blank, D. Park, J. Rhee +1 more·Sep 5, 2019
Kernel methods have a wide spectrum of applications in machine learning. Recently, a link between quantum computing and kernel theory has been formally established, opening up opportunities for quantum techniques to enhance various existing machine-l...
Effects of Quantum Noise on Quantum Approximate Optimization Algorithm
Cheng 程 Xue 薛, Z. Chen 陈, Y. Wu 吴 +1 more·Sep 5, 2019
The quantum-classical hybrid algorithm is a promising algorithm with respect to demonstrating the quantum advantage in noisy-intermediate-scale quantum (NISQ) devices. When running such algorithms, effects due to quantum noise are inevitable. In our ...
Analytical Model and Topology Evaluation of Quantum Secure Communication Network
Qiong Li, Yaxing Wang, Haokun Mao +2 more·Sep 5, 2019
Due to the intrinsic point-to-point feature of quantum key distribution system, it is inevitable to study and develop the Quantum Secure Communication Network (QSCN) technology to provide security communication service for a large-scale of nodes over...
Alibaba Cloud Quantum Development Platform: Applications to Quantum Algorithm Design
Cupjin Huang, M. Szegedy, Fang Zhang +3 more·Sep 5, 2019
We report our work on the Alibaba Cloud Quantum Development Platform (AC-QDP). The capability of AC-QDP's computational engine was already reported in \cite{CZH+18, ZHN+19}.In this follow-up article, we demonstrate with figures how AC-QDP helps in te...
Transitionless phonon assisted photon-qubit quantum state transfer in a hybrid optomechanical system
A. Saha, A. Sarma·Sep 5, 2019
Quantum state transfer is crucial for quantum information processing and quantum computation. Here, we propose a hybrid optomechanical system capable of coupling a qubit, an optical mode and a mechanical oscillator. The displacement of the mechanical...
Quantum Natural Gradient
J. Stokes, J. Izaac, N. Killoran +1 more·Sep 4, 2019
A quantum generalization of Natural Gradient Descent is presented as part of a general-purpose optimization framework for variational quantum circuits. The optimization dynamics is interpreted as moving in the steepest descent direction with respect ...