Information-theoretic meaning of quantum information flow and its applications to amplitude amplification algorithms

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 14
  • Download : 0
The advantages of quantum information processing are in many cases obtained as consequences of quantum interactions, especially for computational tasks where two-qubit interactions are essential. In this work, we establish the framework of analyzing and quantifying loss or gain of information on a quantum system when the system interacts with its environment. We show that the information flow, the theoretical method of characterizing (non-)Markovianity of quantum dynamics, corresponds to the rate of the minimum uncertainty about the system given quantum side information. Thereafter, we analyze the information exchange among subsystems that are under the performance of quantum algorithms, in particular, the amplitude amplification algorithms where the computational process relies fully on quantum evolution. Different realizations of the algorithm are considered, such as (i) quantum circuits, (ii) analog computation, and (iii) adiabatic computation. It is shown that, in all the cases, our formalism provides insight into the process of amplifying the amplitude from the information flow or leakage on the subsystems.
Publisher
AMER PHYSICAL SOC
Issue Date
2019-09
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW A, v.100, no.3

ISSN
2469-9926
DOI
10.1103/PhysRevA.100.032303
URI
http://hdl.handle.net/10203/267504
Appears in Collection
EE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0