Matrices conjugate density

McWeeny, R., Proc. Roy. Soc. [London) A237, 355, (ii) "The density matrix in self-consistent field theory. II. Applications in the molecular orbital theory of conjugated systems."... 

Millam, J. M., Scuseria, G. E., 1997, Linear Scaling Conjugate Gradient Density Matrix Search as an Alternative to Diagonalization for First Principles Electronic Structure Calculations , J. Chem. Phys., 106, 5569. 

The higher surface area of CNTs can support a much higher density of enzymes than previous approaches such as thin films. Their high aspect ratio aids in the retention of enzyme-CNT conjugates in the matrix. CNTs also enhance the stability of adsorbed proteins relative to micro- or macro-scale supports, thereby helping to preserve or enhance enzyme bioactivity in the nanocomposites (Wang,... 

Yaron, D., Moore, E.E., Shuai, Z., Bredas, J.L. Comparison of density matrix renormalization group calculations with electron-hole models of exciton binding in conjugated polymers. J. Chem. Phys. 1998, 108(17), 7451. 

It is not possible to write (1.6) as a matrix sandwiched between a single wave function and its conjugate as in (1.2). To write it nonetheless in a compact fashion one defines a density matrix p by... 

Figure 15. Feynman diagrams for r > 0 where rephasing is possible and r < 0 where rephasing is not possible. Note that for r > 0 the density matrix element during r and ( are complex conjugate of each other, but they have the same phase for r < 0.

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