Towards an Electronic Interferometer based on Spin-Resolved Quantum Hall Edge States

20th International Conference on the Application of High Magnetic Fields in Semiconductor Physics

Karmakar, B.^1 ; Venturelli, D.^1 ; Chirolli, L.^1 ; Taddei, F.^1 ; Giovannetti, V.^1 ; Fazio, R.^1 ; Roddaro, S.^1 ; Biasiol, G.^2 ; Sorba, L.^1 ; Pfeiffer, L.N.^3 ; West, K.W.^3 ; Pellegrini, V.^1 ; Beltram, F.^1

NEST, Scuola Normale Superiore and Instituto Nanoscienrze-CNR, Pisa, Italy^1

Istituto Officina Dei Materiali CNR, Laboratorio TASC, Basovizza (TS), Italy^2

School of Engineering and Applied Science, Princeton University, NJ, United States^3

关键词: Close proximity;    Coherent beams;    Coherent properties;    Impact of temperatures;    Magnetic arrays;    Periodic magnetic fields;    Spin-flip scattering;    Transport analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/456/1/012019/pdf
DOI  :  10.1088/1742-6596/456/1/012019

来源: IOP

【 摘 要 】

Spin resolved edge states are ideal candidates for the implementation of dual-rail quantum computation architectures by encoding the qubit in the spin degree of freedom of the co-propagating edge states. An important element for the realization of such architectures is a coherent beam splitter that controllably mixes the two co-propagating spin-resolved edge channels. Coupling of the spin resolved edge states is demonstrated recently by spin-flip scattering event that is induced by in-plane spatially-dependent periodic magnetic field of the nano-magnet array placed at the boundary of the mesa. In this paper we discuss the nanofabrication and our preliminary transport analysis of an electronic interferometer device made of two nano-magnetic arrays placed in close proximity. The impact of temperature in the coherent properties of the devices is addressed.