Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Walk in Momentum Space with a Bose-Einstein Condensate.
S. Dadras, Alexander Gresch, C. Groiseau +2 more·Feb 22, 2018
We present a discrete-time, one-dimensional quantum walk based on the entanglement between the momentum of ultracold rubidium atoms (the walk space) and two internal atomic states (the "coin" degree of freedom). Our scheme is highly flexible and can ...
Quantum linear systems algorithms: a primer
Danial Dervovic, M. Herbster, P. Mountney +3 more·Feb 22, 2018
The Harrow-Hassidim-Lloyd (HHL) quantum algorithm for sampling from the solution of a linear system provides an exponential speed-up over its classical counterpart. The problem of solving a system of linear equations has a wide scope of applications,...
Error correction for gate operations in systems of exchange-coupled singlet-triplet qubits in double quantum dots
Donovan Buterakos, R. Throckmorton, S. Das Sarma·Feb 22, 2018
We present a scheme for correcting for crosstalk- and noise-induced errors in exchange-coupled singlet-triplet semiconductor double quantum dot qubits. While exchange coupling allows the coupling strength to be controlled independently of the intraqu...
Microscopic characterisation of laser-written phenomena for component-wise testing of photonic integrated circuits
J. Guan, Xiang Liu, A. Menssen +1 more·Feb 22, 2018
Photonic integrated circuits (PICs) directly written with a femtosecond laser have shown great potential in many areas such as quantum information processing (QIP). Many applications, like photon-based quantum computing, demand the up-scaling of PICs...
Demonstration of a Bayesian quantum game on an ion-trap quantum computer
N. Solmeyer, N. Linke, C. Figgatt +4 more·Feb 22, 2018
We demonstrate a Bayesian quantum game on an ion-trap quantum computer with five qubits. The players share an entangled pair of qubits and perform rotations on their qubit as the strategy choice. Two five-qubit circuits are sufficient to run all 16 p...
Deterministic quantum network for distributed entanglement and quantum computation
I. Cohen, K. Mølmer·Feb 22, 2018
We propose a simple architecture for a scalable quantum network, in which the quantum nodes consist of qubit systems confined in cavities. The nodes are deterministically coupled by transmission and reflection of photons, which are disentangled from ...
QuEST and High Performance Simulation of Quantum Computers
Tyson Jones, Anna Brown, I. Bush +1 more·Feb 22, 2018
We introduce QuEST, the Quantum Exact Simulation Toolkit, and compare it to ProjectQ, qHipster and a recent distributed implementation of Quantum++. QuEST is the first open source, hybrid multithreaded and distributed, GPU accelerated simulator of un...
Approaching the Quantum Speed Limit with Global-Local Optimization
J. J. Sørensen, Mikel Aranburu, T. Heinzel +1 more·Feb 21, 2018
We propose a Global-Local optimization algorithm for quantum control that combines standard local search methodologies with evolutionary algorithms. This allows us to find faster solutions to a set of problems relating to ultracold control of Bose-Ei...
Contextuality bounds the efficiency of classical simulation of quantum processes
Angela Karanjai, Joel J. Wallman, S. Bartlett·Feb 21, 2018
Contextuality has been conjectured to be a super-classical resource for quantum computation, analogous to the role of non-locality as a super-classical resource for communication. We show that the presence of contextuality places a lower bound on the...
Quantum annealing versus classical machine learning applied to a simplified computational biology problem
Richard Y. Li, R. Di Felice, R. Rohs +1 more·Feb 21, 2018
Transcription factors regulate gene expression, but how these proteins recognize and specifically bind to their DNA targets is still debated. Machine learning models are effective means to reveal interaction mechanisms. Here we studied the ability of...
Gaussian random number generator: Implemented in FPGA for quantum key distribution
Yue Hu, Yan Wu, Yi Chen +2 more·Feb 20, 2018
Quantum key distribution is the process of using quantum communication to establish a shared key between two parties. It has been demonstrated the unconditional security and effective communication of quantum communication system can be guaranteed by...
64-qubit quantum circuit simulation.
Zhao-Yun Chen, Qi Zhou, Cheng Xue +3 more·Feb 20, 2018
Classical simulations of quantum circuits are limited in both space and time when the qubit count is above 50, the realm where quantum supremacy reigns. However, recently, for the low depth circuit with more than 50 qubits, there are several methods ...
Electron-Phonon Systems on a Universal Quantum Computer.
A. Macridin, P. Spentzouris, J. Amundson +1 more·Feb 20, 2018
We present an algorithm that extends existing quantum algorithms for simulating fermion systems in quantum chemistry and condensed matter physics to include bosons in general and phonons in particular. We introduce a qubit representation for the low-...
Quantum Divide-and-Conquer Anchoring for Separable Non-negative Matrix Factorization
Yuxuan Du, Tongliang Liu, Yinan Li +2 more·Feb 20, 2018
It is NP-complete to find non-negative factors W and H with fixed rank r from a non-negative matrix X by minimizing ||X-WH^Τ ||^2. Although the separability assumption (all data points are in the conical hull of the extreme rows) enables polynomial-t...
A Note on "Quantum Algorithm for Linear Systems of Equations"
Yongzhen Xu, Yifan Huang, Zekun Ye +1 more·Feb 20, 2018
Recently, an efficient quantum algorithm for linear systems of equations introduced by Harrow, Hassidim, and Lloyd, has received great concern from the academic community. However, the error and complexity analysis for this algorithm seems so complic...
One-step implementation of a hybrid Fredkin gate with quantum memories and single superconducting qubit in circuit QED and its applications.
Tongqi Liu, Bao-qing Guo, Chang-shui Yu +1 more·Feb 19, 2018
In a recent remarkable experiment [Sci. Adv. 2, e1501531 (2016)], a 3-qubit quantum Fredkin (i.e., controlled-SWAP) gate was demonstrated by using linear optics. Here we propose a simple experimental scheme by utilizing the dispersive interaction in ...
Deep neural decoders for near term fault-tolerant experiments
C. Chamberland, Pooya Ronagh·Feb 18, 2018
Finding efficient decoders for quantum error correcting codes adapted to realistic experimental noise in fault-tolerant devices represents a significant challenge. In this paper we introduce several decoding algorithms complemented by deep neural dec...
Leader-follower based coalition formation in large-scale UAV networks, a quantum evolutionary approach
Sajad Mousavi, F. Afghah, J. Ashdown +1 more·Feb 18, 2018
The problem of decentralized multiple Point of Interests (Pols) detection and associated task completion in an unknown environment with multiple resource-constrained and self-interested Unmanned Aerial Vehicles (UAVs) is studied. The UAVs form severa...
Introduction to topological quantum computation with non-Abelian anyons
Bernard Field, T. Simula·Feb 17, 2018
Topological quantum computers promise a fault tolerant means to perform quantum computation. Topological quantum computers use particles with exotic exchange statistics called non-Abelian anyons, and the simplest anyon model which allows for universa...
Classification with Quantum Neural Networks on Near Term Processors
E. Farhi, H. Neven·Feb 16, 2018
We introduce a quantum neural network, QNN, that can represent labeled data, classical or quantum, and be trained by supervised learning. The quantum circuit consists of a sequence of parameter dependent unitary transformations which acts on an input...