Title: Asymmetric Mach-Zehnder atom interferometers,
Abstract: It is shown that using beam splitters with non-equal wave vectors results in
a new recoil diagram which is qualitatively different from the well-known
diagram associated with the Mach-Zehnder atom interferometer. We predict a new
asymmetric Mach-Zehnder atom interferometer (AMZAI) and study it when one uses
a Raman beam splitter. The main feature is that the phase of AMZAI contains a
quantum part proportional to the recoil frequency. A response sensitive only to
the quantum phase was found. A new technique to measure the recoil frequency
and fine structure constant is proposed and studied outside of the Raman-Nath
approximation.