Work

Uncertainty relation revisited from quantum estimation theory

Year: 2011

Type: article

Abstract: We use quantum estimation theory to formulate bounds of errors in quantum measurement for arbitrary quantum states and observables in a finite-dimensional Hilbert space. We prove that the measurement errors of two noncommuting observables satisfy Heisenberg-type uncertainty relation, find the achievable bound, and propose a strategy to achieve it.

Source: Physical Review A

DOI: 10.1103/physreva.84.042121

Authors: Yu Watanabe, Takahiro Sagawa, Masahito Ueda

Institutions: The University of Tokyo, Kyoto University, Yukawa Institute for Theoretical Physics, Japan Science and Technology Agency

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Awards: Nonequilibrium Statistical Mechanics of Nonequilibrium Steady States with Information Processing, Study on spontaneous symmetry breaking in ultracold atomic gases