New viable means of storing information for quantum technologies?

Date:
August 3, 2021
Source:
CNRS
Summary:
Quantum information could be behind the next technological
revolution. By analogy with the bit in classical computing,
the qubit is the basic element of quantum computing. However,
demonstrating the existence of this information storage unit and
using it remains complex, and hence limited. An international
research team used theoretical calculations to show that it is
possible to realize a new type of qubit, in which information is
stored in the oscillation amplitude of a carbon nanotube.



FULL STORY ========================================================================== Quantum information could be behind the next technological revolution. By analogy with the bit in classical computing, the qubit is the basic
element of quantum computing. However, demonstrating the existence of this information storage unit and using it remains complex, and hence limited.


==========================================================================
In a study published on 3 August 2021 in Physical Review X, an
international research team consisting of CNRS researcher Fabio Pistolesi1
and two foreign researchers used theoretical calculations to show that
it is possible to realize a new type of qubit, in which information is
stored in the oscillation amplitude of a carbon nanotube. These nanotubes
can perform a large number of oscillations without diminishing, which
shows their low level of interaction with the environment, and makes
them excellent potential qubits. This property would enable for greater reliability in quantum computation.

A problem nevertheless persists with regard to the reading and writing of information stored in the first two energy levels2 of these oscillators.

Scientists successfully proved that this information could be read by
using the coupling between electrons, a negatively charged particle,
and the flexural mode of these nanotubes.

This changes the spacing between the first levels of energy enough to
make them accessible independently from other levels, thereby making it possible to read the information they contain. These promising theoretical predictions have not yet been verified experimentally.

Notes 1 -- Researcher at the Laboratoire ondes et matie`res d'Aquitaine
(CNRS/ Universite' de Bordeaux). He worked with a scientist from the
University of Chicago (United States) and from the Institute of Photonic Sciences in Barcelona (Spain).

2 -- The level of energy is a quantity that can describe systems in
physics, with a level corresponding to a "state" of the system.

========================================================================== Story Source: Materials provided by CNRS. Note: Content may be edited
for style and length.


========================================================================== Journal Reference:
1. F. Pistolesi, A.N. Cleland and A. Bachtold. Proposal for a
Nanomechanical
Qubit. Physical Review X, 3 August 2021 [abstract] ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2021/08/210803084916.htm

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