115 citations · 425 across the 28 of their papers we have counts for
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quant-ph2017★ 5 cited
The unavoidable information flow to environment in quantum measurements
Erkka Haapasalo, Teiko Heinosaari, Takayuki Miyadera
One of the basic lessons of quantum theory is that one cannot obtain information on an unknown quantum state without disturbing it. Hence, by performing a certain measurement, we l…
quant-ph2017★ 16 cited
Optimal quantum observables
Erkka Haapasalo, Juha-Pekka Pellonpaa
Various forms of optimality for quantum observables described as normalized positive operator valued measures (POVMs) are studied in this paper. We give characterizations for obser…