What is counterfactual communication?

Quantum Counterfactual Communication is the recently-proposed idea of using quantum physics to send messages between two parties, without any matter/energy transfer associated with the bits sent.

Can quantum entanglement be used for communications?

Quantum entanglement can be used for communication by taking advantage of the unique correlations exhibited by entangled qubits. We can use entangled qubits to create instantaneous agreement on information across very long distances.

What is quantum communication channel?

In quantum information theory, a quantum channel is a communication channel which can transmit quantum information, as well as classical information. An example of quantum information is the state of a qubit. More formally, quantum channels are completely positive (CP) trace-preserving maps between spaces of operators.

What is a counterfactual in philosophy?

Counterfactual: A counterfactual assertion is a conditional whose antecedent is false and whose consequent describes how the world would have been if the antecedent had obtained. The counterfactual takes the form of a subjunctive conditional: If P had obtained, then Q would have obtained .

What is a counterfactual and why is it important?

Counterfactuals serve a preparative function, and help people avoid past blunders. Counterfactual thinking also serves the affective function to make a person feel better. By comparing one’s present outcome to a less desirable outcome, the person may feel better about the current situation (1995).

Can counterfactuals be observed?

A potential outcome is the outcome that would be realized if the individual received a specific value of the treatment. For each particular individual, one can generally observe only one, but not both, of the two potential outcomes. The unobserved outcome is called the “counterfactual” outcome.