
Thesis Title BlochBit:
Multi photon Coherent manipulations of an atomic twostate system


Since the dawn of
quantum mechanics in the 1920s, the atomic twostate system has served
as an important model of radiationmatter interaction, and has also
been used in a multitude of technical applications. The appearance of
quantum computing concepts in the 1980s ushered in a new role for the
atomic twostate system: that of the “qubit”, the quantum
equivalent of the wellknown “bit” of the digital computer.
Realization of a qubit is an important step towards the construction of
a quantum computer, and many papers describe work that has been done in
this area. In the proposed research, we will focus our attentions on
twostate systems based on room temperature and/or ultracold neutral
alkali atoms. We will try to develop a method for arbitrary
manipulation of these twostate systems, so that they can serve as
addressable, readable qubits. Our qubit manipulations will be based on
Raman laser beams – two coherent laser beams separated in
frequency by the energy interval between the states of the twostate
atomic system.
The development will first review a theoretical issue: the problem of
destructive interference between two parallel Raman excitation routes,
also known as the “ΔmF=2 issue”. The theoretical
study will guide us to the second part of the study – the proper
design and construction of the experiment. In the third and final part,
we will collect and analyze the experimental data, evaluate progress to
our ultimate goal – demonstrating a fundamental twoqubit quantum
gateand chart new ways to proceed. 
