Biomedical subjects

Aram Harrow

Publications and source records attributed to Aram Harrow.

2 recordsLinked to original sources

PubMed2004

Superdense coding of quantum states.

We describe a method for nonobliviously communicating a 2l-qubit quantum state by physically transmitting l+o(l) qubits, and by consuming l ebits of entanglement plus some shared random bits. In the nonoblivious 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.

Journal Article↗

PubMed2004

Coherent communication of classical messages.

We define coherent communication in terms of a simple primitive, show it is equivalent to the ability to send a classical message with a unitary or isometric operation, and use it to relate other resources in quantum information theory. Using coherent communication, we are able to generalize superdense coding to prepare arbitrary quantum states instead of only classical messages. We also derive single-letter formulas for the classical and quantum capacities of a bipartite unitary gate assisted by an arbitrary fixed amount of entanglement per use.

Journal Article↗