Pioneering quantum information science

Quantum Information Science Notes

2 Quantum Error Correction 3 2.1 Quantum operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.1 Density matrices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.2 System-environment model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1.3 Quantum operations definition . . . . . . . . . . . ....

Quantum Information Science

Quantum Information Science

Quantum Information Science and Complex Quantum Systems

My subject in this paper is using quantum information science as an approach to the study of complex quantum systems. The work I describe has involved many collaborators at the University of Queensland and MIT, but I would especially like to emphasize the contribution of Tobias Osborne. Let me begin by asking what it is that makes quantum information science a science? Friends outside the field...

Introduction to Quantum Information Science

Quantum mechanics, at least at some instrumental level, can be viewed as a modification of the probability theory. We replace positive numbers (probabilities) with complex numbers z (probability amplitudes) such that the squares of their absolute values, |z|2, are interpreted as probabilities. The rules for combining amplitudes are very reminiscent of the rules for combining probabilities. z1 z2