Title :
Decoherence in quantum systems
Author_Institution :
Dept. of Phys. & Astron., Louisiana State Univ., Baton Rouge, LA, USA
Abstract :
We discuss various definitions of decoherence and how it can be measured. We compare and contrast decoherence in quantum systems with an infinite number of eigenstates (such as the free particle and the oscillator) and spin systems. In the former case, we point out the essential difference between assuming "entanglement at all times" and entanglement with the reservoir occuring at some initial time. We also discuss optimum calculational techniques in both arenas.
Keywords :
Wigner distribution; oscillators; quantum entanglement; spin systems; decoherence; entanglement; free particle; optimum calculational method; oscillator; quantum systems; spin systems; Cats; Computer interfaces; Extraterrestrial measurements; Oscillators; Probability distribution; Quantum computing; Quantum entanglement; Reservoirs; Teleportation; Temperature;
Journal_Title :
Nanotechnology, IEEE Transactions on
DOI :
10.1109/TNANO.2004.840158
