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JOURNALS // Teoreticheskaya i Matematicheskaya Fizika // Archive

TMF, 1969 Volume 1, Number 2, Pages 287–294 (Mi tmf4572)

This article is cited in 6 papers

Conditions for the representability of the density matrix

M. M. Mestechkin


Abstract: The necessary and sufficient condition for the $N$-representability of reduced density matrices is found for functions of limited rank.

Received: 26.03.1969


 English version:
Theoretical and Mathematical Physics, 1969, 1:2, 221–226

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© Steklov Math. Inst. of RAS, 2026