A silicon-based single-electron interferometer coupled to a fermionic sea

被引：25

作者：

Chatterjee, Anasua ^{[1
]}

Shevchenko, Sergey N. ^{[2
,3
,4
]}

Barraud, Sylvain ^{[5
]}

Otxoa, Ruben M. ^{[6
,7
,8
]}

Nori, Franco ^{[2
,9
]}

Morton, John J. L. ^{[1
,10
]}

Gonzalez-Zalba, M. Fernando ^{[6
]}

机构：

[1] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

[2] RIKEN, Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan

[3] B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine

[4] V Kazarin Kharkov Natl Univ, UA-61022 Kharkov, Ukraine

[5] CEA Grenoble, CEA LETI MINATEC, F-38000 Grenoble, France

[6] Hitachi Cambridge Lab, JJ Thomson Ave, Cambridge CB3 0HE, England

[7] Donostia Int Phys Ctr, Donostia San Sebastian 20018, Spain

[8] Univ Basque Country, UPV EHU, Dept Mat Phys, San Sebastian 20018, Spain

[9] Univ Michigan, Phys Dept, Ann Arbor, MI 48109 USA

[10] UCL, Dept Elect & Elect Engn, London WC1E 7JE, England

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 04期

基金：

英国工程与自然科学研究理事会; 欧盟地平线“2020”; 日本学术振兴会;

关键词：

QUANTUM INFORMATION; SPIN-BLOCKADE; GATE; CHARGE; QUBIT;

D O I：

10.1103/PhysRevB.97.045405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study Landau-Zener-Stuckelberg-Majorana (LZSM) interferometry under the influence of projective readout using a charge qubit tunnel-coupled to a fermionic sea. This allows us to characterize the coherent charge-qubit dynamics in the strong-driving regime. The device is realized within a silicon complementary metal-oxide-semiconductor (CMOS) transistor. We first read out the charge state of the system in a continuous nondemolition manner by measuring the dispersive response of a high-frequency electrical resonator coupled to the quantum system via the gate. By performing multiple fast passages around the qubit avoided crossing, we observe a multipassage LZSM interferometry pattern. At larger driving amplitudes, a projective measurement to an even-parity charge state is realized, showing a strong enhancement of the dispersive readout signal. At even larger driving amplitudes, two projective measurements are realized within the coherent evolution resulting in the disappearance of the interference pattern. Our results demonstrate a way to increase the state readout signal of coherent quantum systems and replicate single-electron analogs of optical interferometry within a CMOS transistor.

引用

页数：7

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