Subquantum information and computation
Abstract
It is argued that immense physical resources  for nonlocal communication, espionage, and exponentiallyfast computation  are hidden from us by quantum noise, and that this noise is not fundamental but merely a property of an equilibrium state in which the universe happens to be at the present time. It is suggested that `nonquantum' or nonequilibrium matter might exist today in the form of relic particles from the early universe. We describe how such matter could be detected and put to practical use. Nonequilibrium matter could be used to send instantaneous signals, to violate the uncertainty principle, to distinguish nonorthogonal quantum states without disturbing them, to eavesdrop on quantum key distribution, and to outpace quantum computation (solving NPcomplete problems in polynomial time).
 Publication:

Pramana
 Pub Date:
 August 2002
 DOI:
 10.1007/s1204300201171
 arXiv:
 arXiv:quantph/0203049
 Bibcode:
 2002Prama..59..269V
 Keywords:

 Hidden variables;
 de BroglieBohm;
 quantum information;
 computation;
 nonlocality.;
 Quantum Physics
 EPrint:
 10 pages, Latex, no figures. To appear in 'Proceedings of the Second Winter Institute on Foundations of Quantum Theory and Quantum Optics: Quantum Information Processing', ed. R. Ghosh (Indian Academy of Science, Bangalore, 2002). Second version: shortened at editor's request