2020/10/14 by Pandey, Ravi Kamal, Prakash, Ranjana, Prakash, Hari
#FOS: Physical sciences #Optics (physics.optics) #Quantum Physics (quant-ph)
paper · doi:10.48550/arxiv.2010.06829
We propose here a new idea for quantum teleportation of superposed coherent state which is not only almost perfect, in principle, but also feasible experimentally. We use entangled resource ∼ |α,\fracα√(2)⟩-|-α,-\fracα√(2)⟩ in contrast with the usual ∼ |α,α⟩-|-α,-α⟩ (both states unnormalized). Bob receives state which is then superposition of the states |± \fracα√(2)⟩ . Bob mixes these with even or odd coherent states involving superposition of states |± \fracα√(2)⟩ to obtain a two-mode state which is one of ∼ |I,0⟩ ± |0,I⟩, |I⟩ being the information state. Bob then obtains the teleported information by using interaction of one of these modes in two cavities with resonant two-level atoms. This scheme results in average fidelity of ≃ 0.95 for |α|2 ≃ 10, which increases with |α|2 and tends to 1 asymptotically, varying as 1-(π2)/(16|α|2)+(π2(π2+8))/(256|α|4) for large values of |α|2.