New research carried out by CQT researchers suggest that standard protocols that measure the dimensions of quantum systems may return incorrect numbers. For that reason, Cai Yu, Cong Wan and Valerio Scarani and Jean Bancal want to create a new concept of ‘irreducible dimensions.’ However, in doing so, physicists will need to re-evaluate how they’ll measure the dimensions of quantum states moving forward.
The CQT researchers concentrate on Hilbert Space when conducting their research, which is a realm of potentially infinite dimensions that are inhabited by quantum systems. “The goal of our paper is to show there is a conceptual problem in how dimension witnesses are defined,” confirms Valerio Scarani, CQT Principal Investigator.
For proper implementation of quantum communication and protocols, accurate measuring is needed, and that’s where the Hilbert Space dimension comes in. This part of the quantum system will let you know exactly how much information can be stored in the system.
In completing their research, the team discovered that the measurement protocols designed to calculate the dimension of a state (the dimension witness) were unable to distinguish between a high-dimension state and a low one. One of the first to raise doubts about the way in which dimension witnesses worked was Post doctorate Jean-Daniel.
Valerio told everyone to stop and reset, and the team proceeded to rewrite their conclusions. While some of the team were doing this, Wan and Cai began working on a new theory involving dimension witnesses, leading to the publishing of their paper.
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