ar X iv : 0 70 5 . 31 55 v 2 [ qu an t - ph ] 9 O ct 2 00 7 Observation of Topological and Parity - dependent Phase of m = 0 Spin States

ar X iv : 0 70 5 . 31 41 v 1 [ as tr o - ph ] 2 2 M ay 2 00 7 The SARG Planet Search

ar X iv : 0 70 4 . 12 77 v 1 [ qu an t - ph ] 1 0 A pr 2 00 7 DISCRETE PHASE SPACE AND MINIMUM - UNCERTAINTY STATES

The quantum state of a system of n qubits can be represented by a Wigner function on a discrete phase space, each axis of the phase space taking values in the finite field F 2 n. Within this framework, we show that one can make sense of the notion of a " rotationally invariant state " of any collection of qubits, and that any such state is, in a well defined sense, a state of minimum uncertainty.

ar X iv : m at h - ph / 0 31 00 10 v 1 8 O ct 2 00 3 Obstructions , Extensions and Reductions . Some applications of Cohomology ∗

After introducing some cohomology classes as obstructions to orientation and spin structures etc., we explain some applications of cohomology to physical problems, in especial to reduced holonomy in M and F -theories.

ar X iv : 0 70 6 . 02 37 v 1 [ qu an t - ph ] 1 J un 2 00 7 Quantum Mechanics in Phase Space

In this paper, I am presenting the basics of the Wigner formulation of Quantum-Mechanics in a very simple language and write about few interpretational stuff raised around it.

ar X iv : 0 70 5 . 19 96 v 2 [ qu an t - ph ] 1 5 M ay 2 00 7 Critique of “ Quantum Enigma : Physics encounters Consciousness ”

The central claim that understanding quantum mechanics requires a conscious observer, which is made made by B. Rosenblum and F. Kuttner in their book ”Quantum Enigma: Physics encounters consciousnes”, is shown to be based on various misunderstandings and distortions of the foundations of quantum mechanics.