Domino

Happy New Year 2008 with Domino

=Conventional computer=

Determinist sciences
Nearly all electronic computers in use today are based on deterministic system : everything that has and will occur in the system is based on the physical outcomes of causality. In a Domino system, every cause produces an effect, and every action becomes the cause of subsequent reactions. These cascading events can show how the system will exist at any moment in time.

To understand this concept, visualize a set of three dominoes lined up in a row. Each domino is less than a domino's length away from its neighbors. Once the first domino has toppled, the third domino will fall because the second will be contacted by the first one. Classical physics is the deterministic system assumed in the domino example. It includes Newton's laws, electrodynamics, thermodynamics, the theory of relativity and chaos theory.

Binary computing
Information is binary stored into physical transistors as bits "0" or "1" ; a classical computer uses Boolean algebra to modify its transistors. Moore's Law observed that integrated circuits doubles in performance every 18 months ; INTEL concluded the increasing performance of transistors should stop in 2020 because their size will be close to atom.

=Quantum computer= A quantum computer makes direct use of quantum mechanical phenomena, such as superposition and entanglement, to perform operations on data. Information is stored as qubits (quantum bits) in any particule such as electron, photon or atom. Quatum teleportation is the movement of elementary particles instantaneously traveling through space and time, faster than the speed of light !

History

 * 1982: Aspect experiment
 * 1993: Teleportation invention ; An international group of six scientists, including IBM Fellow Charles H. Bennett, showed that perfect teleportation is possible, but only if the original is destroyed.
 * 1994: Shor's algorithm while working at ATT Bell Labs
 * 1996: Bell proof of quantum superiority for database seach
 * 1997: Photons teleportation
 * 2004: Atoms teleportation

Power
David Deutsch thinks a 300 qubits quantum computer can simulate the universe. Other scientists believe it can explain the big bang and solve this paradox. According to Nature magazine, last quantum computers are :
 * 2003: 2 qubits
 * 2004: 3 qubits
 * 2005: 8 qubits

Future
Quantum physics holds that certain events such as radioactive movement of particles are completely random. For almost all everyday occurrences, the probability of such random events is extremely close to zero.

=Notes = Some systems are particularly difficult to classify as deterministic or not. The major example is the human mind.