Double Quantum Dot Floquet Gain Medium

被引：38

作者：

Stehlik, J. ^{[1
]}

Liu, Y. -Y. ^{[1
]}

Eichler, C. ^{[1
]}

Hartke, T. R. ^{[1
]}

Mi, X. ^{[1
]}

Gullans, M. J. ^{[2
,3
]}

Taylor, J. M. ^{[2
,3
]}

Petta, J. R. ^{[1
]}

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] NIST, Joint Quantum Inst, Gaithersburg, MD 20899 USA

[3] Univ Maryland, Joint Ctr Quantum Informat & Comp Sci, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW X | 2016年 / 6卷 / 04期

基金：

美国国家科学基金会;

关键词：

JOSEPHSON-PARAMETRIC-AMPLIFIER; SUPERCONDUCTING QUBIT; AMPLIFICATION; COHERENT; CIRCUIT; SYSTEM; NOISE; ELECTRODYNAMICS; PHOTONS; CAVITY;

D O I：

10.1103/PhysRevX.6.041027

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Strongly driving a two-level quantum system with light leads to a ladder of Floquet states separated by the photon energy. Nanoscale quantum devices allow the interplay of confined electrons, phonons, and photons to be studied under strong driving conditions. Here, we show that a single electron in a periodically driven double quantum dot functions as a "Floquet gain medium," where population imbalances in the double quantum dot Floquet quasienergy levels lead to an intricate pattern of gain and loss features in the cavity response. We further measure a large intracavity photon number n(c) in the absence of a cavity drive field, due to equilibration in the Floquet picture. Our device operates in the absence of a dc current-one and the same electron is repeatedly driven to the excited state to generate population inversion. These results pave the way to future studies of nonclassical light and thermalization of driven quantum systems.

引用

页数：11

共 46 条

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