A randomized measurement toolbox for an interacting Rydberg-atom quantum simulator

被引：15

作者：

Notarnicola, Simone ^{[1
,2
,3
,4
]}

Elben, Andreas ^{[5
,6
,7
,8
]}

Lahaye, Thierry ^{[9
]}

Browaeys, Antoine ^{[9
]}

Montangero, Simone ^{[1
,3
,4
]}

Vermersch, Benoit ^{[7
,8
,10
]}

机构：

[1] Univ Padua, Dipartimento Fis & Astron G Galilei, I-35131 Padua, Italy

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Univ Padua, Padua Quantum Technol Res Ctr, I-35131 Padua, Italy

[4] Ist Nazl Fis Nucleare INFN, Sez Padova, I-35131 Padua, Italy

[5] CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA

[6] CALTECH, Walter Burke Inst Theoret Phys, Pasadena, CA 91125 USA

[7] Univ Innsbruck, Ctr Quantum Phys, A-6020 Innsbruck, Austria

[8] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria

[9] Univ Paris Saclay, CNRS, Inst Opt Grad Sch, Lab Charles Fabry, F-91127 Palaiseau, France

[10] Univ Grenoble Alpes, CNRS, LPMMC, Grenoble 38000, France

来源：

NEW JOURNAL OF PHYSICS | 2023年 / 25卷 / 10期

关键词：

random measurements; local unitaries; Rydberg atoms; STATES;

D O I：

10.1088/1367-2630/acfcd3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a toolbox to probe quantum many-body states implemented on Rydberg-atoms quantum hardware via randomized measurements. We illustrate the efficacy of this measurement toolbox in the context of probing entanglement, via the estimation of the purity, and of verifying a ground-state preparation using measurements of the Hamiltonian variance. To achieve this goal, we develop and discuss in detail a protocol to realize independent, local unitary rotations. We benchmark the protocol by investigating the ground state of the one-dimensional Su-Schrieffer-Heeger model, recently realized on a chain of Rydberg atom, and the state resulting after a sudden quench in a staggered XY chain. We probe the robustness of our toolbox by taking into account experimental imperfections, such as pulse fluctuations and measurement errors.

引用

页数：11