Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,666 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Tropical Tensor Network for Ground States of Spin Glasses.
Jin-Guo Liu, Lei Wang, Pan Zhang·Aug 16, 2020
We present a unified exact tensor network approach to compute the ground state energy, identify the optimal configuration, and count the number of solutions for spin glasses. The method is based on tensor networks with the tropical algebra defined on...
Quantum Hoare logic with classical variables
Yuan Feng, M. Ying·Aug 15, 2020
Hoare logic provides a syntax-oriented method to reason about program correctness and has been proven effective in the verification of classical and probabilistic programs. Existing proposals for quantum Hoare logic either lack completeness or suppor...
Error mitigation on a near-term quantum photonic device
D. Su, R. Israel, Kunal Sharma +3 more·Aug 15, 2020
We present two schemes to mitigate the effects of photon loss for a Gaussian Boson Sampling device, in particular, to improve the estimation of the sampling probabilities. Instead of using error correction codes which are expensive in terms of their ...
A Quantum-Inspired Algorithm for the Factorized Form of Unitary Coupled Cluster Theory
Jia Chen, Hai-Ping Cheng, J. Freericks·Aug 15, 2020
The factorized form of unitary coupled cluster theory (UCC) is a promising wave-function ansatz for the variational quantum eigensolver algorithm. Here, we present a quantum inspired algorithm for UCC based on an exact operator identity for the indiv...
Reinforcement Learning with Quantum Variational Circuits
Owen Lockwood, Mei Si·Aug 15, 2020
The development of quantum computational techniques has advanced greatly in recent years, parallel to the advancements in techniques for deep reinforcement learning. This work explores the potential for quantum computing to facilitate reinforcement l...
Quantum algorithm for alchemical optimization in material design†
P. Barkoutsos, F. Gkritsis, Pauline J. Ollitrault +3 more·Aug 14, 2020
The development of tailored materials for specific applications is an active field of research in chemistry, material science and drug discovery. The number of possible molecules obtainable from a set of atomic species grow exponentially with the siz...
Material platforms for defect qubits and single-photon emitters
Gang Zhang, Yuan Cheng, J. Chou +1 more·Aug 14, 2020
Quantum technology has grown out of quantum information theory and now provides a valuable tool that researchers from numerous fields can add to their toolbox of research methods. To date, various systems have been exploited to promote the applicatio...
Exact Quantum Query Algorithms Outperforming Parity -- Beyond The Symmetric functions.
Chandra Sekhar Mukherjee, S. Maitra·Aug 14, 2020
The Exact Quantum Query model is the least explored query model, and almost all of the functions for which non-trivial query algorithms exist are symmetric in nature. In this paper we first explore the Maiorana-McFarland(MM) type Bent functions, defi...
Ab initio molecular dynamics on quantum computers.
D. Fedorov, M. Otten, S. Gray +1 more·Aug 14, 2020
Ab initio molecular dynamics (AIMD) is a valuable technique for studying molecules and materials at finite temperatures where the nuclei evolve on potential energy surfaces obtained from accurate electronic structure calculations. In this work, we pr...
Quantum advantage for computations with limited space
D. Maslov, Jin-Sung Kim, S. Bravyi +2 more·Aug 14, 2020
Quantum computers promise the ability to solve problems that are intractable in the classical setting1, but in many cases this is not rigorously proven. It is often possible to establish a provable theoretical advantage for quantum computations by re...
Fast computation of spherical phase-space functions of quantum many-body states
Bálint Koczor, R. Zeier, S. Glaser·Aug 14, 2020
Quantum devices are preparing increasingly more complex entangled quantum states. How can one effectively study these states in light of their increasing dimensions? Phase spaces such as Wigner functions provide a suitable framework. We focus on phas...
Quantum-enhanced analysis of discrete stochastic processes
Carsten Blank, D. Park, Francesco Petruccione·Aug 14, 2020
Discrete stochastic processes (DSP) are instrumental for modeling the dynamics of probabilistic systems and have a wide spectrum of applications in science and engineering. DSPs are usually analyzed via Monte-Carlo methods since the number of realiza...
A simple method for sampling random Clifford operators
E. Berg·Aug 13, 2020
We describe a simple algorithm for sampling $n$-qubit Clifford operators uniformly at random. The algorithm outputs the Clifford operators in the form of quantum circuits with at most $5n + 2n^2$ elementary gates and a maximum depth of $\mathcal{O}(n...
Correlating AGP on a quantum computer
Armin Khamoshi, Francesco A. Evangelista, G. Scuseria·Aug 13, 2020
For variational algorithms on the near term quantum computing hardware, it is highly desirable to use very accurate ansatze with low implementation cost. Recent studies have shown that the antisymmetrized geminal power (AGP) wavefunction can be an ex...
Single-Photon Image Classification
T. Fischbacher, L. Sbaiz·Aug 13, 2020
Quantum computing-based machine learning mainly focuses on quantum computing hardware that is experimentally challenging to realize due to requiring quantum gates that operate at very low temperature. Instead, we demonstrate the existence of a lower ...
Solving quantum master equations with deep quantum neural networks
Zidu Liu, L. Duan, D. Deng·Aug 12, 2020
Deep quantum neural networks may provide a promising way to achieve quantum learning advantage with noisy intermediate scale quantum devices. Here, we use deep quantum feedforward neural networks capable of universal quantum computation to represent ...
Lanczos recursion on a quantum computer for the Green's function and ground state
T. E. Baker·Aug 12, 2020
The technique of quantum counting is used to obtain coefficients from a Lanczos recursion from a single ground-state wavefunction on the quantum computer. This is used to compute the continued fraction representation of a general Green's function, wh...
Density functionals and Kohn-Sham potentials with minimal wavefunction preparations on a quantum computer
T. E. Baker, D. Poulin·Aug 12, 2020
One of the potential applications of a quantum computer is solving quantum chemical systems. It is known that one of the fastest ways to obtain somewhat accurate solutions classically is to use approximations of density functional theory. We demonstr...
The Argument against Quantum Computers, the Quantum Laws of Nature, and Google's Supremacy Claims
G. Kalai·Aug 12, 2020
My 2018 lecture at the ICA workshop in Singapore dealt with quantum computation as a meeting point of the laws of computation and the laws of quantum mechanics. We described a computational complexity argument against the feasibility of quantum compu...
Short Shor-style syndrome sequences
Nicolas Delfosse, B. Reichardt·Aug 12, 2020
We optimize fault-tolerant quantum error correction to reduce the number of syndrome bit measurements. Speeding up error correction will also speed up an encoded quantum computation, and should reduce its effective error rate. We give both code-speci...