J 2003

Generalized measurements via programmable quantum processor

ROŠKO, C., Vladimír BUŽEK, P.R. CHOUHA and M. HILLERY

Basic information

Original name

Generalized measurements via programmable quantum processor

Authors

ROŠKO, C. (703 Slovakia), Vladimír BUŽEK (703 Slovakia, guarantor), P.R. CHOUHA (703 Slovakia) and M. HILLERY (840 United States of America)

Edition

Physical Review A, New York, American Physical Society, 2003, 1050-2947

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10201 Computer sciences, information science, bioinformatics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 2.589

RIV identification code

RIV/00216224:14330/03:00008713

Organization unit

Faculty of Informatics

Keywords in English

measurement; processor

Tags

Změněno: 28/5/2004 23:42, doc. RNDr. Jan Bouda, Ph.D.

Abstract

V originále

We show that it is possible to control the trade-off between information gain and disturbance in generalized measurements of qudits by utilizing a programmable quantum processor. This universal quantum machine allows us to perform a generalized measurement on the initial state of the input qudit to construct a Husimi function of this state. The trade-off between the gain and the disturbance of the qudit is controlled by the initial state of ancillary system that acts as a program for the quantum-information distributor. The trade-off fidelity does not depend on the initial state of the qudit.

Links

GA201/01/0413, research and development project
Name: Kvantové zpracování informací
Investor: Czech Science Foundation, Quantum information processing
MSM 143300001, plan (intention)
Name: Nesekvenční modely výpočtů - kvantové a souběžné distribuované modely výpočetních procesů
Investor: Ministry of Education, Youth and Sports of the CR, Non-sequential Models of Computing -- Quantum and Concurrent Distributed Models of Computing