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- IBM (United States)US73 papers
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6 papers · 1 filter
Experimental realization of Shor's quantum factoring algorithm using nuclear magnetic resonance
Lieven M. K. Vandersypen, Matthias Steffen, Gregory Breyta +3
The number of steps any classical computer requires in order to find the prime factors of an -digit integer increases exponentially with , at least using algorithms known…
Transition temperature of ferromagnetic semiconductors: a dynamical mean field study
A. Chattopadhyay, S. Das Sarma, A. J. Millis
We formulate a theory of doped magnetic semiconductors such as GaMnAs which have attracted recent attention for their possible use in spintronic applications. We solve…
Non-thermal nuclear magnetic resonance quantum computing using hyperpolarized Xenon
Anne S. Verhulst, Oskar Liivak, Mark H. Sherwood +2
Current experiments in liquid-state nuclear magnetic resonance quantum computing are limited by low initial polarization. To address this problem, we have investigated the use of o…
Stable ultrahigh-density magneto-optical recordings using introduced linear defects
L. Krusin-Elbaum, T. Shibauchi, B. Argyle +2
The stability of data bits in magnetic recording media at ultrahigh densities is compromised by thermal `flips' -- magnetic spin reversals -- of nano-sized spin domains, which eras…
Enhanced Autocompensating Quantum Cryptography System
Donald S. Bethune, Martha Navarro, William P. Risk
We have improved the hardware and software of our autocompensating system for quantum key distribution by replacing bulk optical components at the end stations with fiber-optic equ…
A Toom rule that increases the thickness of sets
Peter Gacs
Toom's north-east-self voting cellular automaton rule R is known to suppress small minorities. A variant which we call R^+ is also known to turn an arbitrary initial configuration…