Journal
CHINESE PHYSICS B
Volume 23, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/23/3/030309
Keywords
quantum dot; Majorana fermion; topological qubit
Categories
Funding
- National Basic Research Program of China [2011CB922100, 2011CBA00205, 2013CB921804]
- General Research Fund (GRF) of the Research Grants Council (RGC) of Hong Kong, China [HKU7058/11P, HKU7045/13P]
- Collaborative Research Fund (CRF) of the Research Grants Council (RGC) of Hong Kong, China [HKU-8/11G]
- University Research Committee (URC) Fund of the Hong Kong University (HKU), China
- National Natural Science Foundation of China [11074111, 11023002, 11004065]
- Priority Academic Program Development of Jiangsu Higher Education Institutions, China
- Program for New Century Excellent Talents in University of Ministry of Education of China
- Program for Changjiang Scholars and Innovative Research Team in University, China
- Fundamental Research Funds for the Central Universities of Ministry of Education of China
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We analyze the reading and initialization of a topological qubit encoded by Majorana fermions in one-dimensional semiconducting nanowires, weakly coupled to a single level quantum dot (QD). It is shown that when the Majorana fermions are fused by tuning gate voltage, the topological qubit can be read out directly through the occupation of the QD in an energy window. The initialization of the qubit can also be realized via adjusting the gate voltage on the QD, with the total fermion parity conserved. As a result, both reading and initialization processes can be achieved in an all-electrical way.
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