Details
| Original language | English |
|---|---|
| Article number | 195420 |
| Journal | Physical Review B |
| Volume | 101 |
| Issue number | 19 |
| Publication status | Published - 15 May 2020 |
| Externally published | Yes |
Abstract
Topologically protected qubits based on nanostructures hosting Majorana bound states (MBSs) hold great promise for fault-tolerant quantum computing. We study the transport properties of nanowire networks hosting MBSs with a focus on the effects of the charging energy and the overlap between neighboring MBSs in short mesoscopic samples. In particular, we investigate structures hosting four MBSs such as T junctions and Majorana boxes. Using a master equation in the Markovian approximation, we discuss the leading transport processes mediated by the MBSs. Single-electron tunneling and processes involving creation and annihilation of Cooper pairs dominate in the sequential-tunneling limit. In the cotunneling regime the charge in the MBSs is fixed and transport is governed by transitions via virtual intermediate states. Our results show that four-terminal measurements in the T junction and Majorana box geometries can be useful tools for the characterization of the properties of MBSs with finite overlaps and charging energy.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Physical Review B, Vol. 101, No. 19, 195420, 15.05.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Transport properties of coupled Majorana bound states in the Coulomb blockade regime
AU - Ekström, Johan
AU - Recher, Patrik
AU - Schmidt, Thomas L.
N1 - Funding information: J.E. and T.L.S. acknowledge support by the National Research Fund, Luxembourg, under Grants No. ATTRACT 7556175 and No. CORE 11352881. P.R. acknowledges financial support from the Hannover-Braunschweig science cooperation QUANOMET and DFG-EXC 2123, Quantum Frontiers.
PY - 2020/5/15
Y1 - 2020/5/15
N2 - Topologically protected qubits based on nanostructures hosting Majorana bound states (MBSs) hold great promise for fault-tolerant quantum computing. We study the transport properties of nanowire networks hosting MBSs with a focus on the effects of the charging energy and the overlap between neighboring MBSs in short mesoscopic samples. In particular, we investigate structures hosting four MBSs such as T junctions and Majorana boxes. Using a master equation in the Markovian approximation, we discuss the leading transport processes mediated by the MBSs. Single-electron tunneling and processes involving creation and annihilation of Cooper pairs dominate in the sequential-tunneling limit. In the cotunneling regime the charge in the MBSs is fixed and transport is governed by transitions via virtual intermediate states. Our results show that four-terminal measurements in the T junction and Majorana box geometries can be useful tools for the characterization of the properties of MBSs with finite overlaps and charging energy.
AB - Topologically protected qubits based on nanostructures hosting Majorana bound states (MBSs) hold great promise for fault-tolerant quantum computing. We study the transport properties of nanowire networks hosting MBSs with a focus on the effects of the charging energy and the overlap between neighboring MBSs in short mesoscopic samples. In particular, we investigate structures hosting four MBSs such as T junctions and Majorana boxes. Using a master equation in the Markovian approximation, we discuss the leading transport processes mediated by the MBSs. Single-electron tunneling and processes involving creation and annihilation of Cooper pairs dominate in the sequential-tunneling limit. In the cotunneling regime the charge in the MBSs is fixed and transport is governed by transitions via virtual intermediate states. Our results show that four-terminal measurements in the T junction and Majorana box geometries can be useful tools for the characterization of the properties of MBSs with finite overlaps and charging energy.
UR - http://www.scopus.com/inward/record.url?scp=85085992884&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.101.195420
DO - 10.1103/PhysRevB.101.195420
M3 - Article
AN - SCOPUS:85085992884
VL - 101
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 19
M1 - 195420
ER -