Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,669 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Stoquastic simulations of non-stoquastic superconducting flux circuits
Harel Kol-Namer, Tom Halverson, Lalit Gupta +2 more·Nov 7, 2020
There is a tremendous interest in fabricating superconducting flux circuits that are nonstoquastic -- i.e., have positive off-diagonal matrix elements -- in their qubit representation, as these circuits are thought to be unsimulable by classical appr...
Efficient quantum algorithm for dissipative nonlinear differential equations
Jin-Peng Liu, Herman Oie Kolden, H. Krovi +3 more·Nov 6, 2020
Significance Nonlinear differential equations appear in many domains and are notoriously difficult to solve. Whereas previous quantum algorithms for general nonlinear differential equations have complexity exponential in the evolution time, we give t...
Even More Efficient Quantum Computations of Chemistry Through Tensor Hypercontraction
Joonho Lee, D. Berry, C. Gidney +4 more·Nov 6, 2020
We describe quantum circuits with only $\widetilde{\cal O}(N)$ Toffoli complexity that block encode the spectra of quantum chemistry Hamiltonians in a basis of $N$ arbitrary (e.g., molecular) orbitals. With ${\cal O}(\lambda / \epsilon)$ repetitions ...
Dimensional Expressivity Analysis of Parametric Quantum Circuits
L. Funcke, T. Hartung, K. Jansen +2 more·Nov 6, 2020
Parametric quantum circuits play a crucial role in the performance of many variational quantum algorithms. To successfully implement such algorithms, one must design efficient quantum circuits that sufficiently approximate the solution space while ma...
Testing of flag-based fault-tolerance on IBM quantum devices.
Anirudh Lanka, Yuan-Jiun Wang, Prithviraj Prabhu·Nov 6, 2020
It is hard to achieve a theoretical quantum advantage on NISQ devices. Besides the attempts to reduce error using error mitigation and dynamical decoupling, small quantum error correction and fault-tolerant schemes that reduce the high overhead of tr...
Highly efficient phase-tunable photonic thermal diode
G. Marchegiani, A. Braggio, F. Giazotto·Nov 5, 2020
We investigate the photon-mediated thermal transport between a superconducting electrode and a normal metal. When the quasiparticle contribution can be neglected, the photon-mediated channel becomes an efficient heat transport relaxation process for ...
TEQUILA: a platform for rapid development of quantum algorithms
Jakob S. Kottmann, Sumner Alperin-Lea, Teresa Tamayo-Mendoza +11 more·Nov 5, 2020
Variational quantum algorithms are currently the most promising class of algorithms for deployment on near-term quantum computers. In contrast to classical algorithms, there are almost no standardized methods in quantum algorithmic development yet, a...
Qualities, challenges and future of genetic algorithms: a literature review
A. Vié, Alissa M. Kleinnijenhuis, D. Farmer·Nov 5, 2020
Genetic algorithms, computer programs that simulate natural evolution, are increasingly applied across many disciplines. They have been used to solve various optimisation problems from neural network architecture search to strategic games, and to mod...
Efficient classical calculation of the Quantum Natural Gradient
Tyson Jones·Nov 5, 2020
Quantum natural gradient has emerged as a superior minimisation technique in quantum variational algorithms. Classically simulating the algorithm running on near-future quantum hardware is paramount in its study, as it is for all variational algorith...
Pathways for Entanglement-Based Quantum Communication in the Face of High Noise.
Xiao-Min Hu, Chao Zhang, Yu Guo +10 more·Nov 5, 2020
Entanglement-based quantum communication offers an increased level of security in practical secret shared key distribution. One of the fundamental principles enabling this security-the fact that interfering with one photon will destroy entanglement a...
Verifying Random Quantum Circuits with Arbitrary Geometry Using Tensor Network States Algorithm.
Chu Guo, You-Wei Zhao, Heliang Huang·Nov 5, 2020
The ability to efficiently simulate random quantum circuits using a classical computer is increasingly important for developing noisy intermediate-scale quantum devices. Here, we present a tensor network states based algorithm specifically designed t...
Quantum simulation and computing with Rydberg-interacting qubits
M. Morgado, Shannon Whitlock·Nov 5, 2020
Arrays of optically trapped atoms excited to Rydberg states have recently emerged as a competitive physical platform for quantum simulation and computing, where high-fidelity state preparation and readout, quantum logic gates and controlled quantum d...
Realization of a quantum Fredkin gate with hybrid degrees of freedom in a single photon
Feiran Wang, Shihao Ru, Yunlong Wang +3 more·Nov 4, 2020
Optimizing the physical realization of quantum gates is important to build a quantum computer. Fredkin gate, also named controlled-swap gate, can be widely applicable in various quantum information processing schemes. In the present research, we prop...
Quantum speedup of Monte Carlo integration with respect to the number of dimensions and its application to finance
K. Kaneko, Koichi Miyamoto, Naoyuki Takeda +1 more·Nov 4, 2020
Monte Carlo integration using quantum computers has been widely investigated, including applications to concrete problems. It is known that quantum algorithms based on quantum amplitude estimation (QAE) can compute an integral with a smaller number o...
Microwaves in Quantum Computing
J. Bardin, D. Slichter, D. Reilly·Nov 3, 2020
Quantum information processing systems rely on a broad range of microwave technologies and have spurred development of microwave devices and methods in new operating regimes. Here we review the use of microwave signals and systems in quantum computin...
Post-Hartree–Fock method in quantum chemistry for quantum computer
Yutaka Shikano, Hiroshi C. Watanabe, Ken M. Nakanishi +1 more·Nov 3, 2020
Quantum computational chemistry is a potential application of quantum computers that is expected to effectively solve several quantum-chemistry problems, particularly the electronic structure problem. Quantum computational chemistry can be compared t...
Surpassing the classical limit in magic square game with distant quantum dots coupled to optical cavities
Sinan Bugu, Fatih Ozaydin, T. Kodera·Nov 3, 2020
The emergence of quantum technologies is heating up the debate on quantum supremacy, usually focusing on the feasibility of looking good on paper algorithms in realistic settings, due to the vulnerability of quantum systems to myriad sources of noise...
Selected topics of quantum computing for nuclear physics*
Dan-Bo Zhang, H. Xing, Hui Yan +2 more·Nov 3, 2020
Nuclear physics, whose underling theory is described by quantum gauge field coupled with matter, is fundamentally important and yet is formidably challenge for simulation with classical computers. Quantum computing provides a perhaps transformative a...
Bayesian Variational Optimization for Combinatorial Spaces
Tony C Wu, Daniel Flam-Shepherd, Alán Aspuru-Guzik·Nov 3, 2020
This paper focuses on Bayesian Optimization in combinatorial spaces. In many applications in the natural science. Broad applications include the study of molecules, proteins, DNA, device structures and quantum circuit designs, a on optimization over ...
Power of data in quantum machine learning
Hsin-Yuan Huang, M. Broughton, M. Mohseni +4 more·Nov 3, 2020
The use of quantum computing for machine learning is among the most exciting prospective applications of quantum technologies. However, machine learning tasks where data is provided can be considerably different than commonly studied computational ta...