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
Deterministic Generation of Loss-Tolerant Photonic Cluster States with a Single Quantum Emitter.
Y. Zhan, Shuo Sun·Jul 13, 2020
A photonic cluster state with a tree-type entanglement structure constitutes an efficient resource for quantum error correction of photon loss. But the generation of a tree cluster state with an arbitrary size is notoriously difficult. Here, we propo...
Quantum Key Distribution Over Quantum Repeaters with Encoding: Using Error Detection as an Effective Postselection Tool
Yumang Jing, D. Alsina, M. Razavi·Jul 13, 2020
We propose a post-selection technique, based on quantum error detection, for quantum key distribution (QKD) systems that run over quantum repeaters with encoding. In such repeaters, quantum error correction techniques are used for entanglement distil...
Benchmarking 16-element quantum search algorithms on IBM quantum processors
Jan Gwinner, Marcin Bria'nski, W. Burkot +2 more·Jul 13, 2020
We present experimental results on running 4-qubit unstructured search on IBM quantum processors. Our best attempt attained probability of success around 24.5%. We try several algorithms and use the most recent developments in quantum search to reduc...
Qubits on the horizon: decoherence and thermalization near black holes
G. Kaplanek, C. Burgess·Jul 12, 2020
We examine the late-time evolution of a qubit (or Unruh-De Witt detector) that hovers very near to the event horizon of a Schwarzschild black hole, while interacting with a free quantum scalar field. The calculation is carried out perturbatively in t...
Quantum error-correcting codes and their geometries
Simeon Ball, Aina Centelles, Felix Huber·Jul 12, 2020
This is an expository article aiming to introduce the reader to the underlying mathematics and geometry of quantum error correction. Information stored on quantum particles is subject to noise and interference from the environment. Quantum error-corr...
Sampling random quantum circuits: a pedestrian's guide
Sean Mullane·Jul 10, 2020
Recent experiments completed by collaborating research groups from Google, NASA Ames, UC Santa Barbara, and others provided compelling evidence that quantum supremacy has finally been achieved on a superconducting quantum processor. The theoretical b...
Reverse annealing for nonnegative/binary matrix factorization
John K. Golden, D. O’Malley·Jul 10, 2020
It was recently shown that quantum annealing can be used as an effective, fast subroutine in certain types of matrix factorization algorithms. The quantum annealing algorithm performed best for quick, approximate answers, but performance rapidly plat...
Exploring complex graphs using three-dimensional quantum walks of correlated photons
M. Ehrhardt, R. Keil, L. Maczewsky +3 more·Jul 10, 2020
Correlated photons undergo quantum walks on 3D graphs governed by their spatial and polarization degrees of freedom. Graph representations are a powerful concept for solving complex problems across natural science, as patterns of connectivity can giv...
Estimation of one-dimensional discrete-time quantum walk parameters by using machine learning algorithms
Parth Rajauria, Prateek Chawla, C. M. Chandrashekar·Jul 9, 2020
Estimation of the coin parameter(s) is an important part of the problem of implementing more robust schemes for quantum simulation using quantum walks. We present the estimation of the quantum coin parameter used for one-dimensional discrete-time qua...
Experimental implementation of leakage elimination operators.
B. G. Markaida, L. -A. Wu·Jul 9, 2020
Decoherence-induced leakage errors can potentially damage physical or logical qubits by coupling them to other system levels. Here we report the first experimental implementation of Leakage Elimination Operators (LEOs) that aims to reduce this underm...
A Quantum Finite Automata Approach to Modeling the Chemical Reactions
A. Bhatia, Shenggen Zheng·Jul 8, 2020
In recent years, the modeling interest has increased significantly from molecular level to atomic and quantum levels. Computational chemistry plays a significant role in designing computational models for the operation and simulation of systems rangi...
Thermal Entanglement and Correlated Coherence in Two Coupled Double Quantum Dots Systems
C. Filgueiras, Onofre Rojas, M. Rojas·Jul 8, 2020
In this work, the thermal quantum correlations in two coupled double semiconductor charge qubits are investigated. This is carried out by deriving analytical expressions for both the thermal concurrence and the correlated coherence. The effects of th...
Quantum Fan-out: Circuit Optimizations and Technology Modeling
P. Gokhale, S. Koretsky, Shilin Huang +4 more·Jul 8, 2020
Instruction scheduling is a key compiler optimization in quantum computing, just as it is for classical computing. Current schedulers optimize for data parallelism by allowing simultaneous execution of instructions, as long as their qubits do not ove...
MoG-VQE: Multiobjective genetic variational quantum eigensolver
D. Chivilikhin, A. Samarin, V. Ulyantsev +3 more·Jul 8, 2020
Variational quantum eigensolver (VQE) emerged as a first practical algorithm for near-term quantum computers. Its success largely relies on the chosen variational ansatz, corresponding to a quantum circuit that prepares an approximate ground state of...
Stabilizer extent is not multiplicative
Arne Heimendahl, Felipe Montealegre-Mora, F. Vallentin +1 more·Jul 8, 2020
The Gottesman-Knill theorem states that a Clifford circuit acting on stabilizer states can be simulated efficiently on a classical computer. Recently, this result has been generalized to cover inputs that are close to a coherent superposition of loga...
Algorithm for quantum computation of particle decays
A. Ciavarella·Jul 8, 2020
A quantum algorithm is developed to calculate decay rates and cross sections using quantum resources that scale polynomially in the system size assuming similar scaling for state preparation and time evolution. This is done by computing finite-volume...
Adiabatic quantum state transfer in a semiconductor quantum-dot spin chain
Y. Kandel, Haifeng Qiao, S. Fallahi +3 more·Jul 8, 2020
Semiconductor quantum-dot spin qubits are a promising platform for quantum computation, because they are scalable and possess long coherence times. In order to realize this full potential, however, high-fidelity information transfer mechanisms are re...
5G network slicing with QKD and quantum-safe security
P. Wright, C. White, Ryan C. Parker +9 more·Jul 7, 2020
We demonstrate how the 5G network slicing model can be enhanced to address data security requirements. In this work, we demonstrate two different slice configurations, with different encryption requirements, representing two diverse use-cases for 5G ...
Policies for elementary links in a quantum network
Sumeet Khatri·Jul 7, 2020
Distributing entanglement over long distances is one of the central tasks in quantum networks. An important problem, especially for near-term quantum networks, is to develop optimal entanglement distribution protocols that take into account the limit...
Riemannian optimization of isometric tensor networks
M. Hauru, M. Damme, J. Haegeman·Jul 7, 2020
Several tensor networks are built of isometric tensors, i.e. tensors satisfying W\dagger W = \mathbb{1}W†W=1. Prominent examples include matrix product states (MPS) in canonical form, the multiscale entanglement renormalization ansatz (MERA), and qua...