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On a Trace Formula for Functions of Noncommuting Operators
A. B. Aleksandrova, V. V. Pellerbc, D. S. Potapovd a St. Petersburg Department of Steklov Mathematical Institute of Russian Academy of Sciences
b Michigan State University, Department of Mathematics
c Peoples' Friendship University of Russia, Moscow
d University of New South Wales
Abstract:
The main result of the paper is that the Lifshits–Krein trace formula cannot be generalized to the case of functions of noncommuting self-adjoint operators. To prove this, we show that, for pairs (A1,B1) and (A2,B2) of bounded self-adjoint operators with trace class differences A2−A1 and B2−B1, it is impossible to estimate the modulus of the trace of the difference f(A2,B2)−f(A1,B1) in terms of the norm of f in the Lipschitz class.
Keywords:
trace, trace class operators, operators Lipschitz functions, Lifshits–Krein trace formula.
Received: 24.11.2018
Citation:
A. B. Aleksandrov, V. V. Peller, D. S. Potapov, “On a Trace Formula for Functions of Noncommuting Operators”, Mat. Zametki, 106:4 (2019), 483–490; Math. Notes, 106:4 (2019), 481–487
Linking options:
https://www.mathnet.ru/eng/mzm12259https://doi.org/10.4213/mzm12259 https://www.mathnet.ru/eng/mzm/v106/i4/p483
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Abstract page: | 515 | Full-text PDF : | 54 | References: | 55 | First page: | 16 |
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