Secure Quantum Bit Commitment Using Unstable Particles

Details Secure Quantum Bit Commitment Using Unstable Particles Secure Quantum Bit Commitment Using Unstable Particles

2006-03-17

arxiv.org/abs/quant-ph/0603154v3

Physics

Quantum Physics

4 pages, 0 figure, REVTEX 4; protocol modified

Scientific paper

Using unstable particles which decay by emitting neutrinos, we propose a quantum bit commitment protocol that is humanly impossible to break. Neutrinos carry away quantum information, but their interaction with matter is so weak that it would take an astronomically-sized machine just to catch them, not to mention performing controlled unitary operations on them. As a result quantum information is lost, and cheating is not possible even if the participants had access to the most powerful quantum computers that could ever be built. Therefore, for all practical purposes, our new protocol is as good as unconditionally secure.

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