update quantum wire example

content/index.txt

@@ -30,8 +30,8 @@ numerics. To aid that, it is provided along with a detailed hand-on `tutorial
 </doc/1.0/tutorial/>`_ and the Kwant `paper </paper>`_, which describes the
 guiding principles underlying its design.
 
-Examples of the use of Kwant
-----------------------------
+Examples of Kwant usage
+-----------------------
 
 The following examples are mostly taken from real research projects done with
 Kwant.  The tutorial_ and the `Kwant paper
@@ -39,21 +39,20 @@ Kwant.  The tutorial_ and the `Kwant paper
 pedagogical examples with line-by-line explanations (`zipfile of all examples
 <http://downloads.kwant-project.org/examples/kwant-examples.zip>`_).
 
-3-d systems
-...........
+3-d system: Majorana states
+...........................
 
 .. container:: rightside
 
-   .. image:: quantum_wire_3d.png
+   .. image:: quantum-wire.png
 
-.. container:: leftside
-
-   .. image:: bilayer_graphene_3d.png
+Kwant allows systems of any dimensionality, for example three-dimensional ones.
+This image shows a 3-d model of a semiconducting quantum wire (gray cylinder).
+The red region is a tunnel barrier, used to measure tunneling conductance, the
+blue region is a superconducting electrode.  In this simulated device, a
+Majorana bound state appears close to the superconducting-normal interface.
 
-The left figure shows a piece of bilayer graphene.  On the right, one can see a
-quantum wire (gray) to which a superconducting electrode (blue) is attached.
-This device has been built in order to give rise to a Majorana bound state close
-to the superconducting-normal interface.
+Taken from: S. Mi, A. R. Akhmerov, M. Wimmer (to be published).
 
 
 Numerical experiment: flying qubit
@@ -71,7 +70,7 @@ reproduced.  Such "numerical experiments" can not only be used to interpret the
 experimental data but also can help to design the sample geometry and in to
 choose the right materials.
 
-Taken from: T. Bautze et al., to be submitted to Phys. Rev. B.  See Yamamoto et
+Taken from T. Bautze et al., to be submitted to Phys. Rev. B.  See Yamamoto et
 al., `Nature Nanotechnology 7, 247 (2012)
 <http://dx.doi.org/doi:10.1038/nnano.2012.28>`_ for details about the
 experiment.