Weak Measurement Protocols for Majorana Bound State Identification
Research output: Contribution to journal › Journal article › Research › peer-review
Documents
- PhysRevLett.124.096801
Final published version, 266 KB, PDF document
We propose a continuous weak measurement protocol testing the nonlocality of Majorana bound states through current shot noise correlations. The experimental setup contains a topological superconductor island with three normal-conducting leads weakly coupled to different Majorana states. Putting one lead at finite voltage and measuring the shot noise correlations between the other two (grounded) leads, devices with true Majorana states are distinguished from those without by strong current correlations. The presence of true Majorana states manifests itself in unusually high noise levels or the near absence of noise, depending on the chosen device configuration. Monitoring the noise statistics amounts to a weak continuous measurement of the Majorana qubit and yields information similar to that of a full braiding protocol, but at much lower experimental effort. Our theory can be adapted to different platforms and should allow for the clear identification of Majorana states.
Original language | English |
---|---|
Article number | 096801 |
Journal | Physical Review Letters |
Volume | 124 |
Issue number | 9 |
Number of pages | 7 |
ISSN | 0031-9007 |
DOIs | |
Publication status | Published - 6 Mar 2020 |
Number of downloads are based on statistics from Google Scholar and www.ku.dk
ID: 241832603