Quantum Dense coding and Quantum Teleportation

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Quantum Dense coding and Quantum Teleportation

Dense Coding1. Alice and Bob share an entangled photon pair in the+state of Φ .2. Bob chooses one of the four unitary transformation{ I,σ }z, σ x, σ y on his photon. The information of whichchoice is 2 bit.3. Bob sends his photon to Alice.4. Alice does a joint Bell-state measurement on thephoton from Bob and her photon.5. With the measurement result, she can tell Bob’sunitary transformation and achieve the 2 bitinformation.

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