6.2.1 Distributed systems

Course subject(s) Module 6: Various applications of a quantum internet

Everywhere in our lives (at work, school and at home), we are all connected to shared systems such as printers and hard drives. How does such a system create order, when we all send a print assignment to the same printer?
How can you be sure that a hard drive only shows you the latest version of a file?

Stephanie will review these concepts and introduce the concept of distributed systems.  We will determine what is the advantage of a quantum internet in this field of application.

Main takeaways

  • A challenge in computing is to coordinate between different computers and different processors; a distributed system.
  • Distributed systems are already known in classical computer science, where people have created protocols that can coordinate between different processors, even when these processors are behaving randomly.
  • The key to solving an agreement problem, which is basically a series of messages that the processors will exchange with each other, in order to solve this problem. This is commonly known as Byzantine agreement problem.
  • Quantum protocols can solve such tasks with a constant number of qubit rounds of communication, so a number of rounds that does not depend on how many processors there are within the network.
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Quantum Internet and quantum computers how will they change the world I by TU Delft OpenCourseWare is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Based on a work at https://ocw.tudelft.nl/courses/quantum-internet-quantum-computers-will-change-world/
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