Quantum Chaos & Quantum Computers

Physics – Quantum Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Lecture at Nobel symposium on "Quantum chaos", June 2000, Sweden; revtex, 10 pages, 9 figures

Scientific paper

10.1238/Physica.Topical.090a0011

The standard generic quantum computer model is studied analytically and numerically and the border for emergence of quantum chaos, induced by imperfections and residual inter-qubit couplings, is determined. This phenomenon appears in an isolated quantum computer without any external decoherence. The onset of quantum chaos leads to quantum computer hardware melting, strong quantum entropy growth and destruction of computer operability. The time scales for development of quantum chaos and ergodicity are determined. In spite the fact that this phenomenon is rather dangerous for quantum computing it is shown that the quantum chaos border for inter-qubit coupling is exponentially larger than the energy level spacing between quantum computer eigenstates and drops only linearly with the number of qubits n. As a result the ideal multi-qubit structure of the computer remains rather robust against imperfections. This opens a broad parameter region for a possible realization of quantum computer. The obtained results are related to the recent studies of quantum chaos in such many-body systems as nuclei, complex atoms and molecules, finite Fermi systems and quantum spin glass shards which are also reviewed in the paper.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Quantum Chaos & Quantum Computers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum Chaos & Quantum Computers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Chaos & Quantum Computers will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-547705

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.