Superdense coding: Difference between revisions

Revision as of 14:04, 3 July 2022

Revision as of 13:16, 11 September 2022

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=== Preparation ===

The protocol starts with the preparation of an entangled state, which is later shared between Alice and Bob. SupposeFor example, the following [[Bell state]]

:<math>|\Phi ^{+}\rangle = \frac{1}{\sqrt{2}} (|0\rangle_A \otimes |0\rangle_B + |1\rangle_A \otimes |1\rangle_B)</math>

is prepared, where <math>\otimes </math> denotes the [[tensor product]], is prepared. Note: weIn cancommon omitusage the tensor product symbol <math>\otimes</math> andmay writebe the Bell state asomitted:

:<math>|\Phi ^{+}\rangle = \frac{1}{\sqrt{2}}(|0_A0_B\rangle + |1_A1_B\rangle)</math>.