This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy.
Skip to the content

Share this

Free weekly newswire

Sign up to receive all our latest news direct to your inbox.

Physics on film

100 Second Science Your scientific questions answered simply by specialists in less than 100 seconds.

Watch now

Bright Recruits

At all stages of your career – whether you're an undergraduate, graduate, researcher or industry professional – can help find the job for you.

Find your perfect job

Physics connect

Are you looking for a supplier? Physics Connect lists thousands of scientific companies, businesses, non-profit organizations, institutions and experts worldwide.

Start your search today


Super single-photon source

Artist's impression of the single-photon source in action. (Courtesy: C Lu).

Artist’s impression of the single-photon source in action. (Courtesy: C Lu)

By Hamish Johnston

One requirement for many quantum-computing schemes is a device that can deliver a succession of single particles such as photons on demand. This has proven to be a challenge because in the quantum world probability reigns, so you can never be certain what will pop out of your device. Another challenging requirement is that these particles must be indistinguishable from each other.

Now, physicists in China, Germany and the UK say they have created the best single-photon source yet to be made from a system of quantum dots. You can read all about how the device delivers photons with “near-unity indistinguishability” in this article on our sister website

This entry was posted in General and tagged , . Bookmark the permalink.
View all posts by this author  | View this author's profile


  1. reader01

    Is possible to use such source of identical photons for slot experiment and confirm it?

  2. reader01

    Can quantum dots also produce indistiguishable polarized photons? Such photons bear two different quantum characteristic that can be used for quantum entanglement.


  • Comments should be relevant to the article and not be used to promote your own work, products or services.
  • Please keep your comments brief (we recommend a maximum of 250 words).
  • We reserve the right to remove excessively long, inappropriate or offensive entries.

Show/hide formatting guidelines

Tag Description Example Output
<a> Hyperlink <a href="">google</a> google
<abbr> Abbreviation <abbr title="World Health Organisation" >WHO</abbr> WHO
<acronym> Acronym <acronym title="as soon as possible">ASAP</acronym> ASAP
<b> Bold <b>Some text</b> Some text
<blockquote> Quoted from another source <blockquote cite="">IOP</blockquote>
<cite> Cite <cite>Diagram 1</cite> Diagram 1
<del> Deleted text From this line<del datetime="2012-12-17"> this text was deleted</del> From this line this text was deleted
<em> Emphasized text In this line<em> this text was emphasised</em> In this line this text was emphasised
<i> Italic <i>Some text</i> Some text
<q> Quotation WWF goal is to build a future <q cite="">
where people live in harmony with nature and animals</q>
WWF goal is to build a future
where people live in harmony with nature and animals
<strike> Strike text <strike>Some text</strike> Some text
<strong> Stronger emphasis of text <strong>Some text</strong> Some text