All-electrically reading out and initializing topological qubits with quantum dots

Abstract

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.

References in corpus (14)

• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• New directions in the pursuit of Majorana fermions in solid state systems
• Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
• Search for Majorana fermions in superconductors
• Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
• Observation of the fractional ac Josephson effect: the signature of Majorana particles
• Detecting Non-Abelian Statistics in the nu=5/2 Fractional Quantum Hall State
• Anyonic interferometry without anyons: How a flux qubit can read out a topological qubit
• Interface Between Topological and Superconducting Qubits
• Proximity Effects in Topological Insulator Heterostructures
• Intra-valley Spin-triplet $p+ip$ Superconducting Pairing in Lightly Doped Graphene

Cited by in corpus (1)

• Correlated parity measurements as a probe of non-abelian statistics in 1D superconducting wires