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quant-ph2005
Quantitative conditions do not guarantee the validity of the adiabatic approximation
D. M. Tong, K. Singh, L. C. Kwek +1
In this letter, we point out that the widely used quantitative conditions in the adiabatic theorem are insufficient in that they do not guarantee the validity of the adiabatic appr…
quant-ph2003
Geometric phases for non-degenerate and degenerate mixed states
K. Singh, D. M. Tong, K. Basu +2
This paper focuses on the geometric phase of general mixed states under unitary evolution. Here we analyze both non-degenerate as well as degenerate states. Starting with the non-d…