Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Stabilizing Arrays of Photonic Cat States via Spontaneous Symmetry Breaking.
Jos'e Lebreuilly, C. Aron, C. Mora·Sep 27, 2018
The controlled generation and the protection of entanglement is key to quantum simulation and quantum computation. At the single-mode level, protocols based on photonic cat states hold strong promise as they present unprecedentedly long-lived coheren...
Gauge structures: From stabilizer codes to continuum models
A. Schmitz·Sep 26, 2018
Stabilizer codes are a powerful method for implementing fault-tolerant quantum memory and in the case of topological codes, they form useful models for topological phases of matter. In this paper, we discuss the theory of stabilizer codes as a discre...
QFlow lite dataset: A machine-learning approach to the charge states in quantum dot experiments
J. P. Zwolak, Sandesh S. Kalantre, Xingyao Wu +2 more·Sep 26, 2018
Background Over the past decade, machine learning techniques have revolutionized how research and science are done, from designing new materials and predicting their properties to data mining and analysis to assisting drug discovery to advancing cybe...
Boosting linear-optical Bell measurement success probability with predetection squeezing and imperfect photon-number-resolving detectors
Thomas Kilmer, S. Guha·Sep 25, 2018
Linear optical realizations of Bell state measurement (BSM) on two single-photon qubits succeed with probability $p_s$ no higher than $0.5$. However pre-detection quadrature squeezing, i.e., quantum noise limited phase sensitive amplification, in the...
Quantum Circuit Designs of Integer Division Optimizing T-count and T-depth
H. Thapliyal, Edgard Muñoz-Coreas, T. Varun +1 more·Sep 25, 2018
Quantum circuits for mathematical functions such as division are necessary to use quantum computers for scientific computing. Quantum circuits based on Clifford+T gates can easily be made fault-tolerant but the T gate is very costly to implement. The...
Quantum phase estimation of multiple eigenvalues for small-scale (noisy) experiments
T. O’Brien, B. Tarasinski, B. Terhal·Sep 25, 2018
Quantum phase estimation (QPE) is the workhorse behind any quantum algorithm and a promising method for determining ground state energies of strongly correlated quantum systems. Low-cost QPE techniques make use of circuits which only use a single anc...
Expected Optimal Time for the NMR Implementation of Shor's Algorithm for Factorising 15
Vlad Cuarare, Alejandro Cros Carrillo de Albornoz, John Taylor·Sep 25, 2018
In this paper, we briefly discuss the methodology for simulating a quantum computer which per-forms Shor’s algorithm on a 7-qubit system to factorise 15. Using this simulation and the overlooked quantum brachistochrone method, we devised a Monte Carlo...
Quantum interference device for controlled two-qubit operations
N. Loft, M. Kjaergaard, L. B. Kristensen +5 more·Sep 24, 2018
Universal quantum computing relies on high-fidelity entangling operations. Here, we demonstrate that four coupled qubits can operate as a quantum gate, where two qubits control the operation on two target qubits (a four-qubit gate). This configuratio...
Fast, Accurate, and Realizable Two-Qubit Entangling Gates by Quantum Interference in Detuned Rabi Cycles of Rydberg Atoms
Xiao-Feng Shi·Sep 24, 2018
High-fidelity entangling quantum gates based on Rydberg interactions are required for scalable quantum computing with neutral atoms. Their realization, however, meets a major stumbling block -- the motion-induced dephasing of the transition between t...
T-count Optimized Quantum Circuits for Bilinear Interpolation
Edgard Muñoz-Coreas, H. Thapliyal·Sep 24, 2018
Quantum circuits for basic image processing functions such as bilinear interpolation are required to implement image processing algorithms on quantum computers. In this work, we propose quantum circuits for the bilinear interpolation of NEQR encoded ...
Environmental effects in quantum annealing
T. Chasseur, S. Kehrein, F. Wilhelm·Sep 24, 2018
For quantum annealing, as opposed to circuit based quantum computing, the solution to a computational problem is encoded in the ground state of a quantum system. Therefore its susceptibility to environmental effects is a different but not less import...
Stern–Gerlach detection of neutral-atom qubits in a state-dependent optical lattice
Tsung-Yao Wu, Aishwarya Kumar, Felipe Giraldo +1 more·Sep 24, 2018
Qubit state measurements are an essential part of any quantum computer, constituting the readout. Accurate measurements are also an integral component of one-way quantum computation and of error correction, which is needed for fault-tolerant quantum ...
An Efficient Algorithmic Way to Construct Boltzmann Machine Representations for Arbitrary Stabilizer Code
Yuanhua Zhang, Zhian Jia, Yuchun Wu +1 more·Sep 23, 2018
Restricted Boltzmann machines (RBMs) have demonstrated considerable success as variational quantum states; however, their representational power remains incompletely understood. In this work, we present an analytical proof that RBMs can exactly and e...
Integrated Analysis of Performance and Resources in Large-Scale Quantum Computing
Yongsoo Hwang, Taewan Kim, Chungheon Baek +1 more·Sep 21, 2018
To see the feasibility of a large-scale quantum computing, it is required to accurately analyze the performance and the quantum resource. However, most of the analysis reported so far have focused on the statistical examination, i.e., simply calculat...
Hierarchical system mapping for large-scale fault-tolerant quantum computing
Yongsoo Hwang, Byung-Soo Choi·Sep 21, 2018
With respect to large-scale quantum computing, it is important to know precisely and quickly how much quantum computational resources are necessary to study components and the whole system. If such quantum resources are provided, how much performance...
Tensor Network Annealing Algorithm for Two-Dimensional Thermal States.
Augustine Kshetrimayum, Augustine Kshetrimayum, Matteo Rizzi +4 more·Sep 21, 2018
Tensor network methods have become a powerful class of tools to capture strongly correlated matter, but methods to capture the experimentally ubiquitous family of models at finite temperature beyond one spatial dimension are largely lacking. We intro...
High-speed Implementation of FFT-based Privacy Amplification on FPGA in Quantum Key Distribution.
Qiong Li, Bingze Yan, Haokun Mao +1 more·Sep 20, 2018
Privacy amplification (PA) is a vital procedure in quantum key distribution (QKD) to generate the secret key that the eavesdropper has only negligible information from the identical correcting key for the communicating parties. With the increase of r...
Dissipative self-interference and robustness of continuous error-correction to miscalibration
Victor V. Albert, Kyungjoo Noh, F. Reiter·Sep 19, 2018
We derive an effective equation of motion within the steady-state subspace of a large family of Markovian open systems (i.e., Lindbladians) due to perturbations of their Hamiltonians and system-bath couplings. Under mild and realistic conditions, ...
A hybrid universal blind quantum computation
Xiaoqian Zhang, Weiqi Luo, Guoqiang Zeng +4 more·Sep 17, 2018
Abstract In blind quantum computation (BQC), a client delegates her quantum computation to a server with universal quantum computers who learns nothing about the client’s private information. In measurement-based BQC model, entangled states are gener...
Computing Wasserstein Distance for Persistence Diagrams on a Quantum Computer
Jesse Berwald, J. Gottlieb, E. Munch·Sep 17, 2018
Persistence diagrams are a useful tool from topological data analysis which can be used to provide a concise description of a filtered topological space. What makes them even more useful in practice is that they come with a notion of a metric, the Wa...