Name: Elise Teo
Index Number: 06
Independent Learning Log (No.4)
Date: 15 June 2016
Time: 4pm - 4:30pm
What I did:
I decided to read up on some news on Science. I found this article on using satellites to transmit uncrackable quantum messages, hence I decided to make a summary of the article and learn new words.
What I learned:
Words I learnt:
Cryptography: art of writing or solving codes
From the article:
Photons can be used to send messages by quantum interference.To produce the quantum interference, the scientists first split photons in two — a feat that is possible because quantum mechanical particles can be in two places at once, a state known as a superposition. The scientists sent light pulses through an optical apparatus, designed so that each photon traversed two paths simultaneously before recombining at the other side. But because one of the paths was longer than the other, when a photon came out the other end, it was split into two packets, one lagging a few billionths of a second behind the other. Such a state is known as a temporal superposition.
The photons will then be reflected back by the satellite.
This article is about how quantum communication in space is feasible.