Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Hybrid quantum-classical algorithms for solving quantum chemistry in Hamiltonian–wave-function space
Z. Yuan, Tao Yin, Dan-Bo Zhang·Aug 20, 2020
The variational quantum eigensolver (VQE) typically optimizes variational parameters in a quantum circuit to prepare eigenstates for a quantum system. Its application to many problems may involve a group of Hamiltonians, e.g., a Hamiltonian of a mole...
Scattering in the Ising model with the quantum Lanczos algorithm
Kubra Yeter-Aydeniz, G. Siopsis, R. Pooser·Aug 20, 2020
Time evolution and scattering simulation in phenomenological models are of great interest for testing and validating the potential for near-term quantum computers to simulate quantum field theories. Here, we simulate one-particle propagation and two-...
Momentum-Space Unitary Couple Cluster and Translational Quantum Subspace Expansion for Periodic Systems on Quantum Computers
D. Manrique, I. Khan, Kentaro Yamamoto +2 more·Aug 19, 2020
We demonstrate the use of the Variational Quantum Eigensolver (VQE) to simulate solid state crystalline materials. We adapt the Unitary Coupled Cluster ansatz to periodic boundary conditions in real space and momentum space representations and direct...
Microcanonical and finite-temperature ab initio molecular dynamics simulations on quantum computers
I. O. Sokolov, P. Barkoutsos, Lukas Moeller +3 more·Aug 18, 2020
Ab initio molecular dynamics (AIMD) is a powerful tool to predict properties of molecular and condensed matter systems. The quality of this procedure is based on accurate electronic structure calculations. The development of quantum processors has sh...
Merged-Element Transmon
R. Zhao, S. Park, T. Zhao +4 more·Aug 17, 2020
Transmon qubits are ubiquitous in the pursuit of quantum computing using superconducting circuits. However, they have some drawbacks that still need to be addressed. Most importantly, the scalability of transmons is limited by the large device footpr...
A quantum circuit simulator and its applications on Sunway TaihuLight supercomputer
Zhimin Wang, Zhao-Yun Chen, Shengbin Wang +4 more·Aug 17, 2020
Classical simulation of quantum computation is vital for verifying quantum devices and assessing quantum algorithms. We present a new quantum circuit simulator developed on the Sunway TaihuLight supercomputer. Compared with other simulators, the pres...
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...
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 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...
Assessing three closed-loop learning algorithms by searching for high-quality quantum control pulses
Xiaodong Yang, C. Arenz, I. Pelczer +4 more·Aug 10, 2020
Designing a high-quality control is crucial for reliable quantum computation. Among the existing approaches, closed-loop leaning control is an effective choice. Its efficiency depends on the learning algorithm employed, thus deserving algorithmic com...
Quantum Power Method by a Superposition of Time-Evolved States
K. Seki, S. Yunoki·Aug 9, 2020
We propose a quantum-classical hybrid algorithm of the power method, here dubbed as quantum power method, to evaluate $\hat{\mathcal{H}}^{n}|\psi\rangle$ with quantum computers, where $n$ is a nonnegative integer, $\hat{\mathcal{H}}$ is a time-indepe...
Simulating Periodic Systems on a Quantum Computer Using Molecular Orbitals.
Jie Liu, Lingyun Wan, Zhenyu Li +1 more·Aug 7, 2020
The variational quantum eigensolver (VQE) is one of the most appealing quantum algorithms to simulate electronic structure properties of molecules on near-term noisy intermediate-scale quantum devices. In this work, we generalize the VQE algorithm fo...
A Sparse Model of Quantum Holography
Shenglong Xu, L. Susskind, Yuan Su +1 more·Aug 5, 2020
We study a sparse version of the Sachdev-Ye-Kitaev (SYK) model defined on random hypergraphs constructed either by a random pruning procedure or by randomly sampling regular hypergraphs. The resulting model has a new parameter, $k$, defined as the ra...
Faster Schrödinger-style simulation of quantum circuits
Aneeqa Fatima, I. Markov·Aug 1, 2020
Recent demonstrations of superconducting quantum computers by Google and IBM and trapped-ion computers from IonQ fueled new research in quantum algorithms, compilation into quantum circuits, and empirical algorithmics. While online access to quantum ...
Polyadic Quantum Classifier
William Cappelletti, Rebecca Erbanni, J. Keller·Jul 28, 2020
We introduce here a supervised quantum machine learning algorithm for multi-class classification on NISQ architectures. A parametric quantum circuit is trained to output a specific bit string corresponding to the class of the input datapoint. We trai...
Enhanced Quantum Key Distribution using Hybrid Channels and Natural Random Numbers
Hemant Rana, Nitin Verma·Jul 28, 2020
Since the introduction of quantum computation by Richard Feynman in 1982, Quantum computation has shown exemplary results in various applications of computer science including unstructured database search, factorization, molecular simulations to name...
ARC 3.0: An expanded Python toolbox for atomic physics calculations
E. J. Robertson, N. Šibalić, R. Potvliege +1 more·Jul 23, 2020
ARC 3.0 is a modular, object-oriented Python library combining data and algorithms to enable the calculation of a range of properties of alkali and divalent atoms. Building on the initial version of the ARC library [N. Sibalic et al, Comput. Phys. Co...
Limitations of Hartree-Fock with quantum resources.
Sahil Gulania, J. Whitfield·Jul 19, 2020
The Hartree-Fock problem provides the conceptual and mathematical underpinning of a large portion of quantum chemistry. As efforts in quantum technology aim to enhance computational chemistry algorithms, the Hartree-Fock method, central to many other...
Abelian topological order of ν=2/5 and 3/7 fractional quantum Hall states in lattice models
Bartholomew Andrews, M. Mohan, T. Neupert·Jul 17, 2020
Determining the statistics of elementary excitations supported by fractional quantum Hall states is crucial to understanding their properties and potential applications. In this paper, we use the topological entanglement entropy as an indicator of Ab...
Achieving fair sampling in quantum annealing
Vaibhaw Kumar, Casey Tomlin, C. Nehrkorn +2 more·Jul 16, 2020
Sampling all ground states of a Hamiltonian with equal probability is a desired feature of a sampling algorithm, but recent studies indicate that common variants of transverse field quantum annealing sample the ground state subspace unfairly. In this...