Teaching plan for the course unit

 

 

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General information

 

Course unit name: Quantum Communications and Cryptography

Course unit code: 574641

Academic year: 2021-2022

Coordinator: Bruno Julia Diaz

Department: Department of Quantum Physics and Astrophysics

Credits: 3

Single program: S

 

 

Estimated learning time

Total number of hours 75

 

Face-to-face and/or online activities

26

 

-  Lecture

Face-to-face and online

 

20

 

-  Lecture with practical component

Face-to-face and online

 

6

Supervised project

20

Independent learning

29

 

 

Recommendations

 

Students are advised to have completed or be enrolled in the subject Advanced Quantum Information Theory.

 

 

Competences to be gained during study

 


  1. Security analysis of quantum key distribution protocols.

  2. Understanding of long-distance quantum communication and the quantum internet.

 

 

 

 

Learning objectives

 

Referring to knowledge


  1. To become familiar with security proofs and computation of secret-key rates.

  2. To understand the role of entanglement in quantum communication.

 

 

Teaching blocks

 

1. Quantum key distribution protocols

*  BB84 protocol

Ekert protocol

Prepare and measure vs entanglement-based protocols

Protocols using continuous-variable systems

2. Security proofs

*  Structure of attacks

Key distillation using one-way and two-way communication

3. Implementations

*  Decoy-state protocols

Fibre optics, free space and satellites

Quantum hacking 

4. Device-independent protocols and relaxations

*  Bell-certified randomness

Semi-device-independent protocols

5. Long-distance q communication

*  Entanglement distillation

Quantum Repeaters

6. Quantum cryptography beyond quantum key distribution

*  Quantum random-number generation

Quantum secret sharing

 

 

Official assessment of learning outcomes

 

 

Examination-based assessment


  1. Evaluation of written exercises.  

  2. Written or oral examination. 

  3. Individual projects, e.g. security analysis of a cryptographic protocol.

  4. Participation.   

 

 

Reading and study resources

Consulteu la disponibilitat a CERCABIB

Book

Nielsen, Michael A.; Chuang, Isaac L. Quantum Computation and Quantum Information, Cambridge University Press. ​

Article

Valerio Scarani, Helle Bechmann-Pasquinucci, Nicolas J. Cerf, Miloslav Dušek, Norbert Lütkenhaus, and Momtchil Peev, The security of practical quantum key distribution, Rev. Mod. Phys. 81, 1301 (2009) 

Antonio Acín and Lluís Masanes, Nature 540, 213 (2016)

Nicolas Gisin and Rob Thew, Quantum communication, Nature Photonics volume 1, 165 (2007).