https://doi.org/10.1140/epjd/e2004-00193-0
Performance of quantum phase gates with cold trapped atoms
1
ECT*, Villa Tambosi Strada delle Tabarelle 286,
38050 Villazzano, Italy
2
CRS BEC-INFM and Dipartimento di Fisica, Università degli Studi di
Trento, 38050 Povo, Italy
3
Institut für Physik, Universität Potsdam, 14469 Potsdam, Germany
4
Institut für Theoretische Physik, Universität Innsbruck, 6020 Innsbruck, Austria
5
Abteilung für Quantenphysik, Universität Ulm, 89069 Ulm, Germany
Corresponding author: a negretti@ect.it
Received:
9
January
2004
Revised:
12
May
2004
Published online:
4
January
2005
We examine the performance of a quantum phase gate implemented with cold neutral atoms in microtraps, when anharmonic traps are employed and the effects of finite temperature are also taken into account. Both the anharmonicity and the temperature are found to pose limitations to the performance of the quantum gate. We present a quantitative analysis of the problem and show that the phase gate has a high quality performance for the experimental values that are presently or in the near future achievable in the laboratory.
PACS: 03.67.Lx – Quantum computation / 32.80.Pj – Optical cooling of atoms; trapping / 34.90.+q – Other topics in atomic and molecular collision processes and interactions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
