"Quantum computing with electrons floating on liquid helium"

M.I. Dykman

Michigan State University

Electrons on a helium surface form a quasi two-dimensional system

which displays the highest mobility reached in condensed matter

physics. We propose to use this system as a set of interacting quantum

bits. We will briefly describe the system and discuss how the qubits can

be manipulated and how their state can be measured. We will also explain

the advantageous features of quantum computers and describe some of the

proposed systems. The working frequency of our quantum computer is

~1GHz. Careful analysis shows that the relaxation rate can be at least 5

orders of magnitude smaller, for low temperatures.