Quantum key distribution is the first application of quantum physics which has entered the commercial market. The security of QKD protocols relies on the quantum nature of the physical system used. In this work, we present a QKD protocol, security of which depends upon the contextuality of mono-party system. It has been shown[1] that Bell CHSH non-locality inequality[2] probes contextuality in single four-level system. We use this contextuality inequality in the proposed protocol as a security check. The advantage of the proposed protocols as compared to Ekert is that it does not involve entangled states, but provides the same level of security. Thus, the cost of generation of entangled states is saved. The experimental key generation rate of proposed protocol will also be higher than the one with entangled states because one can use weak coherent pulses instead of limited brightness of entangled photon pair sources[3].With advancement in generation and manipulation of higher dimensional OAM states, our protocols can be experimentally realized. Thus, we also propose the setup for experimental implementation of the protocol using orbital angular momentum states. Our work is generalizable to conference QKD as w

Contextuality based Quantum key distribution(QKD)

### **This Poster Session Sponsored by**

[![](https://assets.underline.io/uploads/markdown_image/1/image/cccc06bd98192f078cd86c0b3bcf03db.png)](https://www2.bluefors.com/l/853133/2020-10-13/6wsqs)

P1: Quantum communication

poster

The Institute of Physics and IOP Publishing, in partnership with the Chinese Physical Society (CPS) and the University of Science and Technology of China (USTC) are proud to have brought together the international quantum science community online for this inaugural conference.


Early career and leading researchers from universities, industry and government worldwide came together to share, learn and collaborate on the latest research and emerging areas of high interest across quantum science and technology. The broad themes covered by Quantum 2020 included:

Quantum communication;
Quantum computing and quantum simulation;
Quantum sensing, metrology and imaging;
Quantum information theory, software and algorithms;
Quantum foundations;
Quantum technology in industry.
The four-day event featured talks from world-renowned scientists, interactive poster sessions and two exciting panel discussions on the themes of Quantum Technology in Industry and Quantum Technology Programmes Around the World.


You will need to [register](https://www.iopconferences.org/iop/frontend/reg/tRegisterEmailNew.csp?pageID=978403&eventID=1552&tempPersonID=536224) to obtain a ticket. . If you have already registered you should have been sent an email from Underline (to the email address that you registered with) with the subject line ‘Welcome to Quantum 2020’. This email includes your ticket for the event. 

If you have a ticket and are experiencing problems in accessing the event, please contact us. 

Quantum 2020

The Institute of Physics and IOP Publishing, in partnership with the Chinese Physical Society (CPS) and the University of Science and Technology of China (USTC) are proud to have brought together the international quantum science community online for this inaugural conference.

Early career and leading researchers from universities, industry and government worldwide came together to share, learn and collaborate on the latest research and emerging areas of high interest across quantum science and technology. 

Rajni Bala

1

SHORT BIO

Presentations

Contextuality based Quantum key distribution(QKD)

Stay up to date with the latest Underline news!

PRESENTATIONS

CONFERENCES

COMPANY

RESOURCES