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Bennett's laws of quantum information are:

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

where ${\displaystyle \geqslant }$ 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

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