2022 Roadmap for Materials for Quantum Technologies

Becher, Christoph; Gao, Weibo; Kar, Swastik; Marciniak, Christian D.; Monz, Thomas; Bartholomew, John G.; Goldner, Philippe; Loh, Huanqian; Marcellina, Elizabeth; Goh, Kuan Eng Johnson; Koh, Teck Seng; Weber, Bent; Zhao, M. G.; Tsai, Jeng-Yuan; Yan, Qimin; Gyger, Samuel; Steinhauer, Stephan; Zwiller, Val

doi:10.48550/arxiv.2202.07309

Cited by 4 publications

(4 citation statements)

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“…Much has been written about the anticipated quantum advantage that novel computing technologies might demonstrate [1]. Yet actual demonstrations of a quantum system outperforming all existing classical alternatives are still very scarce and are typically based on highly constructed instances with little to no practical applications [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Assessing the performance of quantum annealing with nonlinear driving

et al. 2022

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Current-generation quantum annealers have already proven to be successful problem solvers. Yet quantum annealing is still very much in its infancy, with suboptimal applicability. For instance, to date it is still an open question which annealing protocol causes the fewest diabatic excitations for a given eigenspectrum, and even whether there is a universally optimal strategy. Therefore, in this paper, we report analytical and numerical studies of the diabatic excitations arising from nonlinear protocols applied to the transverse field Ising chain, the exactly solvable model that serves as a quantum annealing playground. Our analysis focuses on several driving schemes that inhibit or facilitate the dynamic phases discussed in a previous work. Rather remarkably, we find that the paradigmatic Kibble-Zurek behavior can be suppressed with "pauses" in the evolution, both for crossing and for stopping at the quantum critical point of the system.

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Section: Introductionmentioning

confidence: 99%

Assessing the performance of quantum annealing with nonlinear driving

et al. 2022

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“…The second Quantum Revolution's main objective lies in multipartite entangled states: their production, storage, certification, and application. Such states, i.e., many-body entangled and many-body Bell correlated states, are essential resources for quantum-based technologies and quantum-enhancement metrology [1][2][3][4][5][6]. As such, a general protocol allowing the controlled generation of such states is an extensive research direction in modern quantum science.…”

Section: Introductionmentioning

confidence: 99%

Accelerating many-body entanglement generation by dipolar interactions in the Bose-Hubbard model

Yanes¹,

Płodzień²,

Gajda³

et al. 2022

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The spin squeezing protocols allow the dynamical generation of massively correlated quantum many-body states, which can be utilized in entanglement-enhanced metrology and technologies. We study a quantum simulator generating twisting dynamics realized in a two-component Bose-Hubbard model with dipolar interactions. We show that the interplay of contact and long-range dipolar interactions between atoms in the superfluid phase activates the anisotropic two-axis countertwisting mechanism, accelerating the spin squeezing dynamics and allowing the Heisenberg-limited accuracy in spectroscopic measurements.

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“…Non-classical correlations, namely entanglement and Bell correlations are fundamental properties of the quantum many-body systems and crucial resources for emerging quantum technologies. Because of enormous challenges in fault-tolerant quantum computing, the main goal for quantum technologies in the next decade is to generate, characterize, validate, and certificate massively correlated quantum states [1][2][3][4][5][6]. In order to fully exploit many-body Bell correlations, we need an experimental protocol to generate such quantum states and a method for classifying the depth of many-body Bell correlations.…”

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confidence: 99%

“…gives the relevant time-scale. We performed many-body numerical calculations [48], to prepare the initial spin coherent state given by the symmetric superposition of atoms in states a and b, to evaluate the unitary evolution and calculate the spin squeezing parameter (3) and the Bell correlator (5). In Fig.…”

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confidence: 99%