Abstract
The theory underpinning the measurement of density matrices of a pair of quantum two-level systems was described with particular emphasis on qubits realized by the two polarization degrees of freedom of a pair of entangled photons generated in a down-conversion experiment. Two techniques of measurement were discussed, namely a maximum likelihood technique and a tomographic reconstruction technique. Error analysis was presented to estimate errors in quantities derived from the density matrix.
| Original language | English (US) |
|---|---|
| Article number | 052312 |
| Pages (from-to) | 523121-5231215 |
| Number of pages | 4708095 |
| Journal | Physical Review A. Atomic, Molecular, and Optical Physics |
| Volume | 64 |
| Issue number | 5 |
| State | Published - Nov 1 2001 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics