Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,586 papers in 12 months (-18% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Efficient Algorithms for Tensor Scaling, Quantum Marginals, and Moment Polytopes
Peter Bürgisser, Cole Franks, A. Garg +3 more·Apr 12, 2018
We present a polynomial time algorithm to approximately scale tensors of any format to arbitrary prescribed marginals (whenever possible). This unifies and generalizes a sequence of past works on matrix, operator and tensor scaling. Our algorithm pro...
Tracking quantum error correction
Kosuke Fukui, A. Tomita, A. Okamoto·Apr 11, 2018
To implement fault-tolerant quantum computation with continuous variables, the Gottesman--Kitaev--Preskill (GKP) qubit has been recognized as an important technological element. We have proposed a method to reduce the required squeezing level to real...
Coupling a Superconducting Quantum Circuit to a Phononic Crystal Defect Cavity
Patricio Arrangoiz-Arriola, E. Alex Wollack, M. Pechal +3 more·Apr 10, 2018
Connecting nanoscale mechanical resonators to microwave quantum circuits opens new avenues for storing, processing, and transmitting quantum information. In this work, we couple a phononic crystal cavity to a tunable superconducting quantum circuit. ...
Neural network decoder for topological color codes with circuit level noise
P. Baireuther, M. D. Caio, B. Criger +2 more·Apr 9, 2018
A quantum computer needs the assistance of a classical algorithm to detect and identify errors that affect encoded quantum information. At this interface of classical and quantum computing the technique of machine learning has appeared as a way to ta...
Decrease of Fisher information and the information geometry of evolution equations for quantum mechanical probability amplitudes.
C. Cafaro, P. Alsing·Apr 9, 2018
The relevance of the concept of Fisher information is increasing in both statistical physics and quantum computing. From a statistical mechanical standpoint, the application of Fisher information in the kinetic theory of gases is characterized by its...
Strawberry Fields: A Software Platform for Photonic Quantum Computing
N. Killoran, J. Izaac, N. Quesada +3 more·Apr 9, 2018
We introduce Strawberry Fields, an open-source quantum programming architecture for light-based quantum computers, and detail its key features. Built in Python, Strawberry Fields is a full-stack library for design, simulation, optimization, and quant...
Dynamic linear response quantum algorithm
A. Roggero, J. Carlson·Apr 4, 2018
The dynamic linear response of a quantum system is critical for understanding both the structure and dynamics of strongly interacting quantum systems, including neutron scattering from materials, photon and electron scattering from atomic systems, an...
A note on state preparation for quantum machine learning
Zhikuan Zhao, V. Dunjko, Jack K. Fitzsimons +2 more·Apr 1, 2018
The intersection between the fields of machine learning and quantum information processing is proving to be a fruitful field for the discovery of new quantum algorithms, which potentially offer an exponential speed-up over their classical counterpart...
Controllable two-photon interference with versatile quantum frequency processor
Hsuan-Hao Lu, J. Lukens, N. Peters +3 more·Mar 28, 2018
Quantum information is the next frontier in information science, promising unconditionally secure communications, enhanced channel capacities, and computing capabilities far beyond their classical counterparts. And as quantum information processing d...
Quantum Chemistry Calculations on a Trapped-Ion Quantum Simulator
Cornelius Hempel, C. Maier, J. Romero +10 more·Mar 27, 2018
Quantum-classical hybrid algorithms are emerging as promising candidates for near-term practical applications of quantum information processors in a wide variety of fields ranging from chemistry to physics and materials science. We report on the expe...
Tunable Coupling Scheme for Implementing High-Fidelity Two-Qubit Gates
F. Yan, P. Krantz, Youngkyu Sung +6 more·Mar 26, 2018
The prospect of computational hardware with quantum advantage relies critically on the quality of quantum gate operations. Imperfect two-qubit gates is a major bottleneck for achieving scalable quantum information processors. Here, we propose a gener...
Entanglement-Based Feature Extraction by Tensor Network Machine Learning
Yuhan Liu, Xiao Zhang, M. Lewenstein +1 more·Mar 24, 2018
It is a hot topic how entanglement, a quantity from quantum information theory, can assist machine learning. In this work, we implement numerical experiments to classify patterns/images by representing the classifiers as matrix product states (MPS). ...
Joint Quantum-State and Measurement Tomography with Incomplete Measurements.
Adam C. Keith, Adam C. Keith, C. Baldwin +3 more·Mar 22, 2018
Estimation of quantum states and measurements is crucial for the implementation of quantum information protocols. The standard method for each is quantum tomography. However, quantum tomography suffers from systematic errors caused by imperfect knowl...
Designing quantum router in IBM quantum computer
B. K. Behera, Tasnum Reza, Angad Gupta +1 more·Mar 17, 2018
Quantum router is an essential ingredient in a quantum network. Here, we propose a new quantum circuit for designing quantum router by using IBM’s five-qubit quantum computer. We design an equivalent quantum circuit, by means of single-qubit and two-...
Restoring Heisenberg scaling in noisy quantum metrology by monitoring the environment
F. Albarelli, M. Rossi, D. Tamascelli +1 more·Mar 15, 2018
We study quantum frequency estimation for N qubits subjected to independent Markovian noise, via strategies based on time-continuous monitoring of the environment. Both physical intuition and an extended convexity property of the quantum Fisher infor...
Independent indistinguishable quantum light sources on a reconfigurable photonic integrated circuit
D. Ellis, A. Bennett, C. Dangel +7 more·Mar 12, 2018
We report a compact, scalable, quantum photonic integrated circuit realised by combining multiple, independent InGaAs/GaAs quantum-light-emitting-diodes (QLEDs) with a silicon oxynitride waveguide circuit. Each waveguide joining the circuit can then ...
Quantum Coherence Measures for Quantum Switch
Marek Sawerwain, J. Wiśniewska·Mar 8, 2018
We suppose that a structure working as a quantum switch will be a significant element of future networks realizing transmissions of quantum information. In this chapter we analyze a process of switch's operating -- especially in systems with a noise ...
Estimating localizable entanglement from witnesses
D. Amaro, Markus P. Müller, A. Pal·Mar 7, 2018
Computing localizable entanglement for noisy many-particle quantum states is difficult due to the optimization over all possible sets of local projection measurements. Therefore, it is crucial to develop lower bounds, which can provide useful informa...
Quantum algorithm for energy matching in hard optimization problems
C. Baldwin, C. Laumann·Mar 6, 2018
We consider the ability of local quantum dynamics to solve the energy matching problem: given an instance of a classical optimization problem and a low energy state, find another macroscopically distinct low energy state. Energy matching is difficult...
Generation of multiphoton entangled quantum states with a single silicon nanowire
Ming Zhang, Lantian Feng, Zhi-yuan Zhou +7 more·Mar 5, 2018
Multiphoton entanglement plays a critical role in quantum information processing, and greatly improves our fundamental understanding of the quantum world. Despite tremendous efforts in either bulk media or fiber-based devices, nonlinear interactions ...