Nonlocal entanglement and noise between spin qubits induced by Majorana bound states

2015 ◽  
Vol 379 (3) ◽  
pp. 170-174 ◽  
Author(s):  
Sha-Sha Ke ◽  
Hai-Feng Lü ◽  
Hua-Jun Yang ◽  
Yong Guo ◽  
Huai-Wu Zhang
Keyword(s):  
Bound States ◽  
Spin Qubits ◽  
Majorana Bound States ◽  
Nonlocal Entanglement

scholarly journals Topological isoconductance signatures in Majorana nanowires

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
L. S. Ricco ◽  
J. E. Sanches ◽  
Y. Marques ◽  
M. de Souza ◽  
M. S. Figueira ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Transport Properties ◽  
Spin Polarization ◽  
Bound States ◽  
Spin Asymmetry ◽  
Experimental Protocol ◽  
Zero Bias ◽  
Topological Superconductor ◽  
Hybrid Device ◽  
Majorana Bound States

AbstractWe consider transport properties of a hybrid device composed by a quantum dot placed between normal and superconducting reservoirs, and coupled to a Majorana nanowire: a topological superconducting segment hosting Majorana bound states (MBSs) at the opposite ends. It is demonstrated that if highly nonlocal and nonoverlapping MBSs are formed in the system, the zero-bias Andreev conductance through the dot exhibits characteristic isoconductance profiles with the shape depending on the spin asymmetry of the coupling between the dot and the topological superconductor. Otherwise, for overlapping MBSs with less degree of nonlocality, the conductance is insensitive to the spin polarization and the isoconductance signatures disappear. This allows to propose an alternative experimental protocol for probing the nonlocality of the MBSs in Majorana nanowires.

scholarly journals Majorana Bound States Hallmarks in a Quantum Topological Interferometer Ring

2021 ◽  
pp. 2100040
Author(s):  
Ana M. Calle ◽  
Pedro A. Orellana ◽  
Jorge A. Otálora
Keyword(s):  
Bound States ◽  
Majorana Bound States

Odd–Even Effect of the Persistent Current in a Quantum Dot Ring with Embedded Majorana Bound States

2015 ◽  
Vol 84 (2) ◽  
pp. 024707 ◽  
Author(s):  
Wei-Jiang Gong ◽  
Ying Zhao ◽  
Zhen Gao ◽  
Guangyu Yi ◽  
Xin Zhang
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Persistent Current ◽  
Majorana Bound States

scholarly journals Assessing Bound States in a One-Dimensional Topological Superconductor: Majorana versus Tamm

2021 ◽  
Author(s):  
Niccolò Traverso Ziani ◽  
Lucia Vigliotti ◽  
Matteo Carrega ◽  
Fabio Cavaliere
Keyword(s):  
Quantum Computation ◽  
Bound States ◽  
Research Activity ◽  
One Dimensional ◽  
Majorana Bound States ◽  
Topological Superconductors ◽  
Topological Quantum ◽  
Tamm State ◽  
Topological Quantum Computation ◽  
Intense Research

Majorana bound states in topological superconductors have attracted intense research activity in view of applications in topological quantum computation. However, they are not the only example of topological bound states that can occur in such systems. We here study a model in which both Majorana and Tamm bound states compete. We show both numerically and analytically that, surprisingly, the Tamm state remains partially localized even when the spectrum becomes gapless. Despite this fact, we demonstrate that the Majorana polarization shows a clear transition between the two regimes.

scholarly journals Photon-Assisted Transport Through a Quantum Dot Side-Coupled to Majorana Bound States

2020 ◽  
Vol 8 ◽  
Author(s):  
Feng Chi ◽  
Tian-Yu He ◽  
Jing Wang ◽  
Zhen-Guo Fu ◽  
Li-Ming Liu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Majorana Bound States

scholarly journals Induced Topological Superconductivity in a BiSbTeSe2-Based Josephson Junction

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 794 ◽  
Author(s):  
Bob de Ronde ◽  
Chuan Li ◽  
Yingkai Huang ◽  
Alexander Brinkman
Keyword(s):  
Radio Frequency ◽  
Josephson Junction ◽  
Frequency Response ◽  
Systematic Study ◽  
Bound States ◽  
Shapiro Step ◽  
Majorana Bound States ◽  
Irradiation Power ◽  
Radio Frequency Waves ◽  
High Irradiation

A 4 π -periodic supercurrent through a Josephson junction can be a consequence of the presence of Majorana bound states. A systematic study of the radio frequency response for several temperatures and frequencies yields a concrete protocol for examining the 4 π -periodic contribution to the supercurrent. This work also reports the observation of a 4 π -periodic contribution to the supercurrent in BiSbTeSe 2 -based Josephson junctions. As a response to irradiation by radio frequency waves, the junctions showed an absence of the first Shapiro step. At high irradiation power, a qualitative correspondence to a model including a 4 π -periodic component to the supercurrent is found.

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