Quantum diplomacy is a new term that came into fashion with the growth of quantum technology. This concept is still relatively new and is being explored by researchers in various fields, including international relations, physics, and computer science.
On conceptual level, quantum entanglement, the idea that two particles can become linked in such a way that the state of one particle is affected by the state of the other, can provide a new way of thinking about the relationships between different countries or actors in international relations.
Quantum technology is also becoming a prominent topic on diplomatic agenda as countries initiate complex and expensive research projects on quantum computing. Such projects require a lot of scientific cooperation on an international level. Quantum technology could also be useful in diplomatic practice. For example, quantum cryptography can ensure secure diplomatic communication.