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A single qubit Landau-Zener gate

✍ Scribed by V.G. Benza; G. Strini

Book ID
105357380
Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
148 KB
Volume
51
Category
Article
ISSN
0015-8208

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✦ Synopsis

Abstract

We study the hamiltonian and dissipative dynamics of a system undergoing a sequence of level crossings. The resulting Landau‐Zener effect makes a new implementation of a general single qubit gate possible. In the dissipative case, with a periodic bias, the level crossing counteracts the interlevel relaxation and drives the system toward a two dimensional attractor. This feature can in principle be used to implement quantum memory devices of new type.

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## Abstract We study semi‐classical measures of families of solutions to a 2 Γ— 2 Dirac system with 0 mass, which presents bands crossing. We focus on constant electro‐magnetic fields. The fact that these fields are orthogonal or not leads to different geometric situations. In the first case, one re