Echo-Ramsey Interferometry with Motional Quantum States

摘要: Ramsey interferometers (RIs) using internal electronic or nuclear states find wide applications in science and engineering. We develop a matter wave interferometer for motional quantum exploiting the S- D-bands of an optical lattice identify different de-phasing de-coherence mechanisms. implement band echo technique, employing repeated $\pi$-pulses. This suppresses evolution significantly increase coherence time state by one order magnitude. thermal fluctuations as main mechanism remaining decay contrast. Our demonstration echo-Ramsey with has potential application study many body dynamics, qubits manipulation.