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quant-ph2022★ 3 cited
Newton's identities and positivity of trace class integral operators
G. Homa, R. Balka, J. Z. Bernád +2
We provide a countable set of conditions based on elementary symmetric polynomials that are necessary and sufficient for a trace class integral operator to be positive semidefinite…
quant-ph2020★ 10 cited
Range of applicability of the Hu-Paz-Zhang master equation
G. Homa, A. Csordás, M. A. Csirik +1
We investigate a case of the Hu-Paz-Zhang master equation of the Caldeira-Leggett model without Lindblad form obtained in the weak-coupling limit up to the second-order perturbatio…