Shot noise distinguishes Majorana fermions from vortices injected in the edge mode of a chiral p-wave superconductor
@article{Beenakker2020ShotND, title={Shot noise distinguishes Majorana fermions from vortices injected in the edge mode of a chiral p-wave superconductor}, author={C. W. J. Beenakker and D. O. Oriekhov}, journal={arXiv: Superconductivity}, year={2020} }
The chiral edge modes of a topological superconductor support two types of excitations: fermionic quasiparticles known as Majorana fermions and $\pi$-phase domain walls known as edge vortices. Edge vortices are injected pairwise into counter-propagating edge modes by a flux bias or voltage bias applied to a Josephson junction. An unpaired edge mode carries zero electrical current on average, but there are time-dependent current fluctuations. We calculate the shot noise power produced by a…
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References
SHOWING 1-10 OF 27 REFERENCES
Electrical detection of the Majorana fusion rule for chiral edge vortices in a topological superconductor
- PhysicsSciPost Physics
- 2019
Majorana zero-modes bound to vortices in a topological superconductor
have a non-Abelian exchange statistics expressed by a non-deterministic
fusion rule: When two vortices merge they may or they
may…
Topologically protected charge transfer along the edge of a chiral p-wave superconductor.
- Physics
- 2015
The Majorana fermions propagating along the edge of a topological superconductor with $p_x+ip_y$ pairing deliver a shot noise power of $\frac{1}{2}\times e^2/h$ per eV of voltage bias. We calculate…
Deterministic Creation and Braiding of Chiral Edge Vortices.
- PhysicsPhysical review letters
- 2019
This work proposes to use the chiral motion along the boundary of the superconductor to braid a mobile vortex in the edge channel with an immobile vortex with Majorana zero mode in the bulk.
Time-resolved electrical detection of chiral edge vortex braiding
- PhysicsSciPost Physics
- 2020
A 2\pi2π
phase shift across a Josephson junction in a topological superconductor
injects vortices into the chiral edge modes at opposite ends of the
junction. When two vortices are fused they…
Interferometric and noise signatures of Majorana fermion edge states in transport experiments.
- PhysicsPhysical review letters
- 2011
This work proposes to study noise correlations in a Hanbury Brown-Twiss type interferometer and finds three signatures of the Majorana nature of the channels, including an anomalously large shot noise in the output ports for a vanishing average current signal.
Half-integer charge injection by a Josephson junction without excess noise
- PhysicsPhysical Review B
- 2020
A Josephson junction in a topological superconductor can inject a charge e/2 into a normal-metal contact, carried by chiral Majorana edge modes. Here we address the question whether this half-integer…
Electrically detected interferometry of Majorana fermions in a topological insulator.
- PhysicsPhysical review letters
- 2009
This work shows how a pair of neutral Majorana fermions can be converted reversibly into a charged Dirac fermion, and enables electrical detection of a qubit by an interferometric measurement.
Current-phase relation and h/e -periodic critical current of a chiral Josephson contact between one-dimensional Majorana modes
- Physics
- 2016
We explore a long Josephson contact transporting Cooper pairs between one-dimensional (1D) charge-neutral chiral Majorana modes in the leads via charged Dirac chiral modes in the normal region. We…
Probing neutral Majorana fermion edge modes with charge transport.
- PhysicsPhysical review letters
- 2009
A point contact formed by a superconducting junction is introduced and it is shown that its transmission can be controlled by the phase difference across the junction.
Quantized conductance at the Majorana phase transition in a disordered superconducting wire.
- PhysicsPhysical review letters
- 2011
It is shown that the phase transition itself is signaled by a quantized thermal conductance and electrical shot noise power, irrespective of the degree of disorder, in a ring geometry.