Persistent entanglement of valley exciton qubits in transition metal dichalcogenides integrated into a bimodal optical cavity

被引：5

作者：

Borges, Halyne S. ^{[1
]}

Junior, Celso A. N. ^{[2
]}

Brandao, David S. ^{[2
]}

Liu, Fujun ^{[2
]}

Pereira, V. V. R.

Xie, S. J. ^{[3
]}

Qu, Fanyao ^{[2
,4
]}

Alcalde, A. M. ^{[5
]}

机构：

[1] Inst Fed Triangulo Mineiro, BR-38747792 Patrocinio, MG, Brazil

[2] Univ Brasilia, Inst Fis, BR-70919970 Brasilia, DF, Brazil

[3] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[4] Univ Brasilia, Int Ctr Phys, BR-70910900 Brasilia, Brazil

[5] Univ Fed Uberlandia, Inst Fis, BR-38400902 Uberlandia, MG, Brazil

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 03期

基金：

中国国家自然科学基金;

关键词：

MONOLAYER; GENERATION; STATES;

D O I：

10.1103/PhysRevB.107.035404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report dissipative dynamics of two valley excitons residing in the K and K' valleys of a bare WSe2 monolayer and the one being integrated into a bimodal optical cavity. In the former, only when the exciton-field detunings in the K and K' valleys are rigorously equal (resonant detuning) can partially entangled stationary states be created. Otherwise, the concurrence of exciton qubits turns to zero. Remarkably, in the latter (the WSe2 monolayer in a bimodal optical cavity), the transfers of entanglement from one subsystem (exciton/light) to the other (light/exciton) take place. Hence a finite stationary concurrence of exciton qubits is always generated, independent of whether the exciton-field detuning in two valleys is resonant or nonresonant. In addition, it can even reach as high as 1 (maximally entangled state of two valley excitons). Since there no real system which has a strictly resonant detuning, an immersion of the WSe2 monolayer in a bimodal optical cavity provides an opportunity to overcome the challenge facing by the bare WSe2, opening a novel realm of potential qubits.

引用

页数：13

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