1–26 Apr 2019
Nordita, Stockholm
Europe/Stockholm timezone

Quantum computation and the additional degrees of freedom in a physical system

26 Apr 2019, 11:00
1h
122:026 (Nordita, Stockholm)

122:026

Nordita, Stockholm

Speaker

Prof. Jan-Åke Larsson (Linköping University)

Description

The speed-up of Quantum Computers is the current drive of an entire scientific field with several large research programmes both in industry and academia world-wide. Many of these programmes are intended to build hardware for quantum computers. A related important goal is to understand the reason for quantum computational speed-up; to understand what resources are provided by the quantum system used in quantum computation. Some candidates for such resources include superposition and interference, entanglement, nonlocality, contextuality, and the continuity of state-space. The standard approach to these issues is to restrict quantum mechanics and characterize the resources needed to restore the advantage. Our approach is dual to that, instead extending a classical information processing systems with additional properties in the form of additional degrees of freedom, normally only present in quantum-mechanical systems. In this talk, we will have a look at these additional degrees of freedom and how quantum computers make use of them to achieve the so-called quantum speedup. We will also discuss whether the additional degrees of freedom can be viewed as a ”side channel,” a term often seen in cryptology, and whether quantum parallelism rather should be viewed as computation performed in some additional degree of freedom.

Primary author

Prof. Jan-Åke Larsson (Linköping University)

Presentation materials

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