ar X iv : q ua nt - p h / 04 08 07 4 v 1 1 1 A ug 2 00 4 Tightening The Theory - Experiment Connection In

ar X iv : q ua nt - p h / 04 11 17 2 v 1 2 3 N ov 2 00 4 Information and Entropy in Quantum Theory

ar X iv : q ua nt - p h / 04 08 18 1 v 1 30 A ug 2 00 4 Wigner Rotations and Iwasawa Decompositions in Polarization Optics

Wigner rotations and Iwasawa decompositions are manifestations of the internal space-time symmetries of massive and massless particles, respectively. It is shown to be possible to produce combinations of optical filters which exhibit transformations corresponding to Wigner rotations and Iwasawa decompositions. This is possible because the combined effects of rotation, phase-shift, and attenuati...

ar X iv : q ua nt - p h / 01 08 04 9 v 3 18 A ug 2 00 1 Simple Scheme for Efficient Linear Optics Quantum Gates

We describe the construction of a conditional quantum control-not (CNOT) gate from linear optical elements following the program of Knill, Laflamme and Milburn [Nature 409, 46 (2001)]. We show that the basic operation of this gate can be tested using current technology. We then simplify the scheme significantly.

ar X iv : q ua nt - p h / 04 05 11 6 v 2 1 0 A ug 2 00 4 Complementarity of Entanglement and Interference

A complementarity relation is shown between the visibility of interference and bipartite entanglement in a two qubit interferometric system when the parameters of the quantum operation change for a given input state. The entanglement measure is a decreasing function of the visibility of interference. The implications for quantum computation are briefly discussed.

ar X iv : q ua nt - p h / 05 08 06 7 v 1 8 A ug 2 00 5 NEW SCHEME OF QUANTUM TELEPORTATION

A new scheme for quantum teleportation is presented, in which the complete teleportation can be occurred even when an entangled state between Alice and Bob is not maximal.