The effects of the inevitable coupling to external degrees of freedom of a quantum computer
are examined. It is found that for quantum calculations (in which the maintenance of …

This work is a part of an effort to analyze the physical limitations of computers due to the
laws of physics. For example, Bennett'" has made a careful study of the free energy …

DAVID DEUTSCH in will be next, the design of microelectronic components. But soon it will
be necessary to harness quantum theory, rather than simply take it into account, to give …

Recently, it was realized that use of the properties of quantum mechanics might speed up
certain computations dramatically. Interest has since been growing in the area of quantum …

In this chapter, the authors discuss a part in an effort to analyze the physical limitations of
computers due to the laws of physics. It is a result of computer science that a universal …

We address the question of how a quantum computer can be used to simulate experiments
on quantum systems in thermal equilibrium. We present two approaches for the preparation …

Universal Quantum Simulators Page 1 33. G. Felsenfeld et al., J. Am. Chem. Soc. 79, 2023 (1957);
AG Letai et al., Biochemistry 27, 9108 (1988). 34. M. Riley, Microbiol. Rev. 57, 862 (1993) …

T he principles of quantum computing were laid out about 15 years ago by computer
scientists applying the superposition principle of quantum mechanics to computer operation …

We analyse dissipation in quantum computation and its destructive impact on the efficiency
of quantum algorithms. Using a general model of decoherence, we study the time evolution …

This paper provides necessary and sufficient conditions for constructing a universal
quantum computer over continuous variables. As an example, it is shown how a universal …