TY - JOUR

T1 - Interference and parity blockade in transport through a Majorana box

AU - Nitsch, Maximilian

AU - Souto, Ruben Seoane

AU - Leijnse, Martin

PY - 2022/11/17

Y1 - 2022/11/17

N2 - A Majorana box-two topological superconducting nanowires coupled via a trivial superconductor-is a building block in devices aiming to demonstrate non-Abelian physics, as well as for topological quantum computer architectures. We theoretically investigate charge transport through a Majorana box and show that current can be blocked when two Majoranas couple to the same lead, fixing their parity. In direct analogy to a Pauli spin blockade in spin qubits, this parity blockade can be used for fast and high-fidelity qubit initialization and readout, as well as for current-based measurements of decoherence times. Furthermore, we demonstrate that transport can distinguish between a clean Majorana box and a disordered box with additional unwanted Majorana or Andreev bound states.

AB - A Majorana box-two topological superconducting nanowires coupled via a trivial superconductor-is a building block in devices aiming to demonstrate non-Abelian physics, as well as for topological quantum computer architectures. We theoretically investigate charge transport through a Majorana box and show that current can be blocked when two Majoranas couple to the same lead, fixing their parity. In direct analogy to a Pauli spin blockade in spin qubits, this parity blockade can be used for fast and high-fidelity qubit initialization and readout, as well as for current-based measurements of decoherence times. Furthermore, we demonstrate that transport can distinguish between a clean Majorana box and a disordered box with additional unwanted Majorana or Andreev bound states.

KW - QUANTUM

KW - ANYONS

U2 - 10.1103/PhysRevB.106.L201305

DO - 10.1103/PhysRevB.106.L201305

M3 - Journal article

VL - 106

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 20

M1 - 201305

ER -