33 research outputs found
Direct cavity detection of Majorana pairs
No experiment could directly test the particle/antiparticle duality of
Majorana fermions, so far. However, this property represents a necessary
ingredient towards the realization of topological quantum computing schemes.
Here, we show how to complete this task by using microwave techniques. The
direct coupling between a pair of overlapping Majorana bound states and the
electric field from a microwave cavity is extremely difficult to detect due to
the self-adjoint character of Majorana fermions which forbids direct energy
exchanges with the cavity. We show theoretically how this problem can be
circumvented by using photo-assisted tunneling to fermionic reservoirs. The
absence of direct microwave transition inside the Majorana pair in spite of the
light-Majorana coupling would represent a smoking gun for the Majorana
self-adjoint character.Comment: 6 pages, 4 figure
Towards hybrid circuit quantum electrodynamics with quantum dots
Cavity quantum electrodynamics allows one to study the interaction between
light and matter at the most elementary level. The methods developed in this
field have taught us how to probe and manipulate individual quantum systems
like atoms and superconducting quantum bits with an exquisite accuracy. There
is now a strong effort to extend further these methods to other quantum
systems, and in particular hybrid quantum dot circuits. This could turn out to
be instrumental for a noninvasive study of quantum dot circuits and a
realization of scalable spin quantum bit architectures. It could also provide
an interesting platform for quantum simulation of simple fermion-boson
condensed matter systems. In this short review, we discuss the experimental
state of the art for hybrid circuit quantum electrodynamics with quantum dots,
and we present a simple theoretical modeling of experiments.Comment: Minor differences with published versio