Bennett's laws

Bennett's laws of quantum information are:

1. 1 qubit $\geqslant$ 1 bit (classical)
2. 1 qubit $\geqslant$ 1 ebit (entanglement bit)
3. 1 ebit + 1 qubit $\geqslant$ 2 bits (i.e. superdense coding)
4. 1 ebit + 2 bits $\geqslant$ 1 qubit (i.e. quantum teleportation)

where $\geqslant$ indicates 'can do the job of.'

These principles were formulated around 1993 by Charles H. Bennett.

References

• Quantum Mechanics: The Physics of the Microscopic World, Benjamin Schumacher, The Teaching Company, lecture 21