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quant-ph2020★ 2 cited
Higher-order uncertainty bounds for mixed states
Alex J. Belfield, Dorje C. Brody
Uncertainty lower bounds for parameter estimations associated with a unitary family of mixed-state density matrices are obtained by embedding the space of density matrices in the H…
quant-ph2020
Quantum Measurement of Space-Time Events
Dorje C. Brody, Lane P. Hughston
The phase space of a relativistic system can be identified with the future tube of complexified Minkowski space. As well as a complex structure and a symplectic structure, the futu…