Unconditionally Secure Quantum Bit Commitment Using Neutron Double-Slit Interference

Details Unconditionally Secure Quantum Bit Commitment Using Neutron Double-Slit Interference Unconditionally Secure Quantum Bit Commitment Using Neutron Double-Slit Interference

2009-10-14

arxiv.org/abs/0910.2645v4

Physics

Quantum Physics

Revised protocol, 4 pages, no figure

Scientific paper

Using a neutron double-slit setup, we construct a quantum bit commitment scheme in which time development of quantum states plays an essential role. Our scheme evades the widely accepted no-go theorem by the fact that it is neither possible to stop the time evolution of spreading wave packets, nor is it possible to evolve them backward in time. Moreover, for unstable particles such as neutrons, one cannot delay detecting their positions indefinitely, or they would disintegrate spontaneously and escape detection. We find that using non-stationary states instead of stationary ones, unconditionally secure quantum bit commitment is possible.

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