Papers

Yangming Zhao, C. Qiao·May 17, 2021

Quantum computing holds a great promise and this work proposes to use new quantum data networks (QDNs) to connect multiple small quantum computers to form a cluster. Such a QDN differs from existing QKD networks in that the former must deliver data q...

Hristo Tonchev, Petar Danev·May 17, 2021

This paper examines the stability of the quantum random walk search algorithm, when the walk coin is constructed by generalized Householder reflection and additional phase shift, against inaccuracies in the phases used to construct the coin. The opti...

Elizabeth R. Bennewitz, Florian Hopfmueller, B. Kulchytskyy +2 more·May 17, 2021

Near-term quantum computers provide a promising platform for finding the ground states of quantum systems, which is an essential task in physics, chemistry and materials science. However, near-term approaches are constrained by the effects of noise, ...

Thien Nguyen, Lindsay Bassman, Phillip C. Lotshaw +7 more·May 17, 2021

We present a composable design scheme for the development of hybrid quantum/classical algorithms and workflows for applications of quantum simulation. Our object-oriented approach is based on constructing an expressive set of common data structures a...

E. Peters, A. Li, G. Perdue·May 17, 2021

Readout errors on near-term quantum computers can introduce significant error to the empirical probability distribution sampled from the output of a quantum circuit. These errors can be mitigated by classical postprocessing given the access of an exp...

Ida C. Skogvoll, Jonas Lidal, J. Danon +1 more·May 16, 2021

The ongoing rapid progress towards quantum technologies relies on and strives for new hybrid platforms optimized for specific quantum computation and communication tasks. We theoretically study a spin qubit exchange-coupled to an anisotropic ferromag...

I. Dodin, E. Startsev·May 15, 2021

Quantum algorithms for computing classical nonlinear maps are widely known for toy problems but might not suit potential applications to realistic physics simulations. Here, we propose how to compute a general differentiable invertible nonlinear map ...

C. Gonçalves·May 15, 2021

The development of automated gate specification for quantum communications and quantum networked computation opens up the way for malware designed at corrupting the automation software, changing the automated quantum communications protocols and algo...

Gushu Li, Yunong Shi, Ali Javadi-Abhari·May 15, 2021

Computational chemistry is the leading application to demonstrate the advantage of quantum computing in the near term. However, large-scale simulation of chemical systems on quantum computers is currently hindered due to a mismatch between the comput...

Lukas Burgholzer, Hartwig Bauer, R. Wille·May 14, 2021

Classical simulations of quantum computations are vital for the future development of this emerging technology. To this end, decision diagrams have been proposed as a complementary technique which frequently allows to tackle the inherent exponential ...

Y. Tiwari, Aditya Dev, V. Poonia·May 14, 2021

Quantum dot-based spin qubit realization is one of the most promising quantum computing systems owing to its integrability with classical computation hardware and its versatility in realizing qubits and quantum gates. In this work, we investigate a q...

M. Strzałka, K. Roszak·May 14, 2021

W generalize the scheme for detection of qubit-environment entanglement to qudit-environment systems. This is of relevance for many-qubit systems and the quantification of the operation of quantum algorithms under the influence of external noise, sin...

M. Mezzini, F. Pelayo, F. Cuartero·May 14, 2021

In this paper we present a quantum algorithm which increases the amplitude of the states corresponding to the solutions of the search problem by a factor of almost two.

F. C'ardenas-L'opez, J. Yu, C. K. Andersen +2 more·May 14, 2021

We study the feasibility of reaching the ultrastrong (USC) and deep-strong coupling (DSC) regimes of light-matter interaction, in particular at resonance condition, with a superconducting charge qubit, also known as Cooper-Pair box (CPB). We numerica...

K. Robbins, P. Love·May 14, 2021

The Variational Quantum Eigensolver (VQE) is a promising algorithm for Noisy Intermediate Scale Quantum (NISQ) computation. Verification and validation of NISQ algorithms' performance on NISQ devices is an important task. We consider the exactly-diag...

Prajit Dhara, N. Linke, E. Waks +2 more·May 14, 2021

Trapped ions form an advanced technology platform for quantum information processing with long qubit coherence times, high-fidelity quantum logic gates, optically active qubits, and a potential to scale up in size while preserving a high level of con...

Sam Cole, Michał Eckstein, S. Friedland +1 more·May 14, 2021

We analyze a quantum version of the Monge–Kantorovich optimal transport problem. The quantum transport cost related to a Hermitian cost matrix C is minimized over the set of all bipartite coupling states ρAB\documentclass[12pt]{minimal} \usepackage{a...

Santosh Kumar Radha·May 14, 2021

The quantum approximate optimization algorithm (QAOA) is a hybrid quantum-classical variational algorithm which offers the potential to handle combinatorial optimization problems. Introducing constraints in such combinatorial optimization problems po...

Stuart Hadfield, T. Hogg, E. Rieffel·May 14, 2021

We develop a framework for analyzing layered quantum algorithms such as quantum alternating operator ansätze (QAOA). In the context of combinatorial optimization, our framework relates quantum cost gradient operators, derived from the cost and mixing...

A. Kardashin, A. Pervishko, J. Biamonte +1 more·May 13, 2021

Implementing variational quantum algorithms with noisy intermediate-scale quantum machines of up to a hundred qubits is nowadays considered as one of the most promising routes towards achieving a quantum practical advantage. In multiqubit circuits, r...