量子通訊與量子自動控制 Quantum Communication/Quantum Control

Presentation on theme: "量子通訊與量子自動控制 Quantum Communication/Quantum Control"— Presentation transcript:

1 量子通訊與量子自動控制 Quantum Communication/Quantum Control
丁致良 崇右企專

2 Stochastic Resonance for Quantum Channels
Stochastic Resonance for Quantum Channels, Phys. Rev. E (1999). Noise Effects for the Depolarizing Channel, Phys. Lett. A (1999).

3 Synergy of Modern Sciences

4 Information Theory Shannon’s theories 網路是無線寬廣的 寬頻上網 最寬到底能多寬?
網路是無線寬廣的 寬頻上網 最寬到底能多寬? WinZip 壓縮檔案能壓多小?

5 What is Stochastic Resonance?

6 Quantum Computers 1995 P.Shore 科學月刊 27卷 6 期 1998 年 李國鼎文教基金會通俗科學寫作獎
長榮月刊2000年9月轉載 教育部高中生加油站 盜用

7 Schrödinger’s Cat 1

8 一石二鳥 Is there stochastic resonance for quantum channels?
How could we have larger capacity for a quantum channel?

9 Channel

10 Mutual Information in the classical Limit is

11 Channel Capacity

12

13 Call for Participation:
Teleportation Channels by P.Shore New Definitions for Capacities

14 Quantum Feedback Control without Measurement

15 Traditional Method for Feedback Control
measurement

16 Non-Cloning Theorem Cloner: Quantum States CANNOT be Cloned
V. Buzek and M. Hillery, Phys. Rev. A, 54, (1996). N.J.Cerf, Phys. Rev. Lett., 84, 4497 (2000). L.M.Duan and G. C. Guo, Phys. Rev. Lett., 80, (1998).

17 The Method I Proposed for Quantum Control

18 Example:2-Level Atoms Sponteneous Decay

19