>VITAE:
Masanao Ozawa is full professor at Graduate School of Information Sciences, Tohoku University, formerly professor at Nagoya.
He is well known expert of Quantum Information, Quantum Measurements and Quantum Open Systems. His realization theorem for instruments is largely known.

It has long been accepted that the product of the measurement noise in measuring A and the disturbance caused on B has a lower bound determined by the expectation of [A,B]. In the debate on the quantum limit on gravitational detection, we have experienced that such a reciprocal relation, called the Heisenberg Uncertainty Principle, is not reliable as a universally valid relation; Yuen's contractive state measurement is physically realizable, and yet violates not only the stated limit for monitoring but also the Heisenberg Uncertainty Principle. Here, we show an answer to the remaining problem: what is the universally valid relation for measurement noise and disturbance?
We also discuss the fundamental quantum limit on the accuracy of universal quantum logic gates derived by the new uncertainty principle in the light of conservation laws and the non-classicality of controlling systems.