none

DIAMOND QUANTUM COMPUTING?

14-07-2016
by 
in 

Researchers have designed a device that could one day form the building blocks of quantum information processing systems by carefully placing a tiny piece of diamond within a few nanometers of a carbon nanotube, and then sending an electric current through said nanotube.

In their recent study, they have shown that the electrified nanotube's mechanical vibrations couple to the magnetic (or spin) properties of defects in the diamond. This coupling allows for the quantum states of the nanotube and diamond to be transferred to each other as well as to a second diamond positioned several micrometers away.

The researchers, Peng-Bo Li et al., have published a paper on the new hybrid quantum device in a recent issue of Physical Review Letters.

Diamonds and carbon nanotubes, which are both carbon allotropes, each have their own unique properties that make building such a device possible.

Diamond contains defects called nitrogen-vacancy centers that emit highly coherent bright red light. The defects' optical properties can be well-controlled so that they occupy one of two distinct states, which enables the defects to act as qubits.

Carbon nanotubes, for their part, are well-known for their highly advantageous mechanical and electrical properties.

Both diamonds and carbon nanotubes have been widely studied as separate entities, but rarely together as an integrated device.

"This device could be used to mechanically address quantum logic gates based on electric spins and could serve as novel nanoscale sensors for detecting tiny pressure, temperature, electric, and magnetic-field changes in the physical and life sciences," Li said.

Related news & editorials

  1. 13.12.2018
    13.12.2018
    by      In
    Optibelt reckons its low-stretch and maintenance-free Red Power 3 v-belt drives offer a range of advantages in heavy-duty applicatioins. Crucially, the belts are designed so that once correctly tensioned the first time, they don’t require retensioning - a valuable saver of time and money.
    A major... Read More
  2. 13.12.2018
    13.12.2018
    by      In
    Exair’s has developed a fine-mesh nonwoven drum cover for use on 60 and 205 litre drums. The breathable material allows the air from an Exair Line Vac air-operated conveyor to circulate when moving material in or out of a drum. The drum cover prevents contamination of the material and keeps it... Read More
  3. 12.12.2018
    12.12.2018
    by      In
    With almost 40 years of experience in applications of incremental shaft encoders, Plant Control & Automation has developed a number of instruments for both testing and simulating these complex devices.
    Now the company has put all this expertise into one instrument: the EncoderLab is both an... Read More
  4. 11.12.2018
    11.12.2018
    by      In
    Wenglor has expanded its PNG smart generation of photoelectronic sensors, available in Australia from Treotham Automation. The range now comprises seven devices, including new compact 1P (50 x 50 x 20mm) and 1N (75 x 32.5 x 18mm) housings, all equipped with IO-Link 1.1 for Industry 4.0 integration... Read More