Marichu T. Miscala In quantum mechanics, the presence of spin-orbit coupling gives rise to the Hamiltonian that will no longer commute with [eq]\vec{L}[/eq], and [eq]\vec{S}[/eq], so the spin and orbital momenta are not separately conserved. In order to understand this concept better, a commutation problem for orbital angular momentum [eq]\vec{L}[/eq], spin [eq]\vec{S}[/eq], and spin-orbital momentum [eq]\vec{J}[/eq] is […]

## Archive for March 20th, 2010

### Commutation of Spin, Angular and Spin-Orbital Momentum

Saturday, March 20th, 2010Posted in Quantum Science Philippines **|** No Comments »

### Quantum Mechanics Violating Bell’s Inequality

Saturday, March 20th, 2010Lotis R. Racines Einstein never liked quantum mechanics. He didn’t like the idea that the momentum of a particle, if it’s position was known, was completely unknowable: that is, random [1]. He even said that: “God does not play dice with the universe.” which was referred to Copenhagen Interpretation of quantum mechanics that there exists […]

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### Three Dimensional Virial Theorem for the Hydrogen Atom

Saturday, March 20th, 2010Catherine Therese J. Quiñones The virial theorem is a general theorem relating the potential energy (V) and the kinetic energy (T) in a bound system. A simple physical example is a small object orbiting around another object bound by a force as in the case of a hydrogen atom. The average kinetic energy and potential […]

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### BATTLING DECOHERENCE: THE FAULT-TOLERANT QUANTUM COMPUTER

Saturday, March 20th, 2010EDWIN B. FABILLAR Introduction Information carried by a quantum system has notoriously weird properties. Physicists and engineers are now learning how to put that weirdness to work. Quantum computers, which manipulate quantum states rather than classical bits, may someday be able to perform tasks that would be inconceivable with conventional digital technology. A particularly daunting […]

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