Abstract
The quantum illumination is examined by making use of the three-mode maximally entangled Gaussian state, which involves one signal and two idler beams. It is shown that the quantum Bhattacharyya bound between rho (state for target absence) and sigma (state for target presence) is less than the previous result derived by two-mode Gaussian state when N_S, average photon number per signal, is less than 0.295. This indicates that the quantum illumination with three-mode Gaussian state gives less error probability compared to that with two-mode Gaussian state when N_S < 0.295.
Highlights
As IC becomes smaller and smaller in modern classical technology, the effect of quantum mechanics becomes prominent more and more
It is used in various quantum information processing, such as quantum teleportation [5,6], superdense coding [7], quantum cloning [8], quantum cryptography [9,10], quantum metrology [11], and quantum computer [2,12,13]
As we will show in the following, the states ρ and σ derived from the three-mode maximally entangled state still have zero bipartite entanglement for first biparty while nonzero for the remaining parties. In this reason the noise discussed in our quantum illumination scheme is not completely entanglement-breaking, because it survives between two idler beams
Summary
As IC (integrated circuit) becomes smaller and smaller in modern classical technology, the effect of quantum mechanics becomes prominent more and more. Quantum entanglement [1,3,4] plays an important role as a physical resource. It is used in various quantum information processing, such as quantum teleportation [5,6], superdense coding [7], quantum cloning [8], quantum cryptography [9,10], quantum metrology [11], and quantum computer [2,12,13]. The entanglement-assisted target detection protocol called the quantum illumination [14,15] and its experimental realization [16,17,18,19,20] were explored. Quantum illumination is a protocol which takes advantage of quantum entanglement
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