arXiv:quant-ph/0003122 · Fortschritte der Physik

Quantum Computation with Hot and Cold Ions: An Assessment of Proposed Schemes

D.F.V. James

Published Sep 1, 2000• 115 citations

Abstract

We present a brief critical review of the proposals for quantum computation with trapped ions, with particular emphasis on the schemes for quantum computation which relax the stringent requirements for maintaining the ions in the quantum ground state of their collective oscillatory modes.

DOI: 10.1002/1521-3978(200009)48:9/11<823::aid-prop823>3.0.co;2-m

Related papers

Quantum Computation with hot and cold ions: An assessment of proposed schemes

James, D F V

We present a brief critical review of the proposals for quantum computation with trapped ions, with particular emphasis on the possibilities for quantum computation without the need for cooling to the quantum ground state of the ions' collective oscillatory modes.

Mar 27, 200096 citations

Quantum computation with trapped ions and the "heating problem"

Daniel F. V. James

We present a brief review of the current state of the art of quantum computation with trapped ions, with particular emphasis on the problems caused by `heating' of the ions' motional degrees of freedom.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEJul 13, 20000 citations

Schemes of Quantum Computations with Trapped Ions

J. F. Poyatos, J. I. Cirac, P. Zoller

The purpose of this article is to review two complementary schemes for quantum computation with trapped ions. We initially discuss the first proposal of quantum computations with cold trapped ions (J. I. Cirac and P. Zoller; Phys. Rev. Lett. 74, 4091, 1995) which requires, prior to any computation, laser cooling to the motional ground state. This proposal is closely related to the physics of generating and manipulating N-particles entangled states in both ion traps and high-Q cavities (cavity quantum electrodynamics). The second scheme is that of quantum computations with hot trapped ions (J.F. Poyatos, J.I. Cirac and P. Zoller; Phys. Rev. Lett. 81, 1322, 1998) which works at finite temperature and resembles physical ideas found in atom interferometry.

Fortschritte der PhysikSep 1, 20006 citations

Prospects for Quantum Computation with Trapped Ions

Richard Hughes, Daniel F. V. James

A brief survey of the requirements for quantum computational hardware, and an overview of the ion trap quantum computation project at Los Alamos are presented. The physical limitations to quantum computation with trapped ions are discussed.

Fortschritte der PhysikNov 1, 19981 citation

Quantum computing with trapped ions

Christopher R. Monroe, Wayne M. Itano, D. Kielpinski +5 more

Summary form only given. We have laser-cooled all modes of two ions and select modes of three ions to the ground state, thereby paving the way for subsequent quantum logic operations. We have also used quantum logic on two ions to engineer the Bell entangled states, representing the first source of entanglement not relying on a selection process. This type of deterministic entanglement is a crucial requirement for large-scale quantum computation.

Quantum Electronics and Laser Science ConferenceJan 1, 19992 citations

Method of quantum computation with ``hot'' trapped ions

Sara Schneider, Daniel F. V. James, Gerard J Milburn

We present a novel method of performing quantum logic gates in trapped ion quantum computers which does not require the ions to be cooled down to their vibrational center of mass (CM) mode ground state. Our scheme employs adiabatic passages and the conditional phase shift first investigated by D'Helon and Milburn (C.~D'Helon and G.J.~Milburn, Phys. Rev. A {\bf 54}, 5141 (1996)).

arXiv:quant-ph/9808012Aug 7, 199810 citations