Superdense coding of quantum states

Harrow, Aram; Hayden, Patrick; Leung, Debbie

Superdense coding of quantum states

Authors

Harrow, Aram

Hayden, Patrick

Leung, Debbie

Description

We describe a method to non-obliviously communicate a 2l-qubit quantum state by physically transmitting l+o(l) qubits of communication, and by consuming l ebits of entanglement and some shared random bits. In the non-oblivious scenario, the sender has a classical description of the state to be communicated. Our method can be used to communicate states that are pure or entangled with the sender's system; l+o(l) and 3l+o(l) shared random bits are sufficient respectively.
5 pages, revtex4