Decoherence and information encoding in quantum reference frames
- URL: http://arxiv.org/abs/2006.07298v2
- Date: Thu, 25 Jun 2020 12:26:55 GMT
- Title: Decoherence and information encoding in quantum reference frames
- Authors: Jan Tuziemski
- Abstract summary: In most situations, e.g. in laboratories, physical processes are described within reference frames constituted by physical systems.
One of its consequences is the fact that quantum correlations depend on a physical state of an observers reference frame.
I discuss implications of this results for modern developments of decoherence theory: Quantum Darwinism and Spectrum Broadcast Structures.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Reference frames are of special importance in physics. They are usually
considered to be idealized entities. However, in most situations, e.g. in
laboratories, physical processes are described within reference frames
constituted by physical systems. As new technological developments make it
possible to demonstrate quantum properties of complex objects an interesting
conceptual problem arises: Could one use states of quantum systems to define
reference frames? Recently such a framework has been introduced in [F.
Giacomini, E. Castro-Ruiz, and \v{C}. Brukner, Nat Commun 10, 494 (2019)]. One
of its consequences is the fact that quantum correlations depend on a physical
state of an observers reference frame. The aim of this work is to examine the
dynamical aspect of this phenomena and show that the same is true for
correlations established during an evolution of a composite systems. Therefore,
decoherence process is also relative: For some observers the reduced evolution
of subsystems is unitary, whereas for others not. I also discuss implications
of this results for modern developments of decoherence theory: Quantum
Darwinism and Spectrum Broadcast Structures.
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