24 citations · 45 across the 2 of their papers we have counts for
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math-ph2007★ 24 cited
The Significance of the -Numerical Range and the Local -Numerical Range in Quantum Control and Quantum Information
Thomas Schulte-Herbrueggen, Gunther Dirr, Uwe Helmke +1
This paper shows how C-numerical-range related new strucures may arise from practical problems in quantum control--and vice versa, how an understanding of these structures helps to…
math-ph2007★ 21 cited
Relative "-Numerical Ranges for Applications in Quantum Control and Quantum Information
G. Dirr, U. Helmke, M. Kleinsteuber +1
Motivated by applications in quantum information and quantum control, a new type of "-numerical range, the relative "-numerical range denoted , is introduced. It ar…