Bennett's laws of
quantum information
Quantum information is the information of the state of a quantum system. It is the basic entity of study in quantum information theory, and can be manipulated using quantum information processing techniques. Quantum information refers to both t ...
are:
# 1
qubit
In quantum computing, a qubit () or quantum bit is a basic unit of quantum information—the quantum version of the classic binary bit physically realized with a two-state device. A qubit is a two-state (or two-level) quantum-mechanical syste ...
1
bit
The bit is the most basic unit of information in computing and digital communication. The name is a portmanteau of binary digit. The bit represents a logical state with one of two possible values. These values are most commonly represented as ...
(classical),
# 1 qubit
1
ebit (
entanglement bit),
# 1 ebit + 1 qubit
2 bits (i.e.
superdense coding
In quantum information theory, superdense coding (also referred to as ''dense coding'') is a quantum communication protocol to communicate a number of classical bits of information by only transmitting a smaller number of qubits, under the ass ...
),
# 1 ebit + 2 bits
1 qubit (i.e.
quantum teleportation
Quantum teleportation is a technique for transferring quantum information from a sender at one location to a receiver some distance away. While teleportation is commonly portrayed in science fiction as a means to transfer physical objects from on ...
),
where
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
Benjamin "Ben" Schumacher is an American theoretical physicist, working mostly in the field of quantum information theory.
He discovered a way of interpreting quantum states as information. He came up with a way of compressing the information in ...
, The Teaching Company, lecture 21
Quantum information theory
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