2012/09/03 by Yuri I. Ozhigov, Ozhigov, Yuri I.
Physics and Astronomy · #81-08 #FOS: Physical sciences #General Physics (physics.gen-ph) #Quantum Physics (quant-ph) #msc:81-08 #physics.gen-ph #quant-ph
paper · pdf · doi:10.48550/arxiv.1209.0747
14 pages, 1 figure
arxiv created 2012/09/03 · arxiv updated 2012/09/18
It is shown that quantum devices based only on oscillators cannot serve as the universal quantum computer, despite of entanglement in such devices, which we roughly estimate for the ideal case and for the harmful entanglement with photonic modes. We show that quasi-particles are the native shell for the entanglement already for ground state, in contast to the free electromagnetic field where vacuum state does not produce entanglement at all.