Ballistic atom pumps

Abstract

We examine a classically-chaotic system consisting of two reservoirs of particles connected by a channel containing oscillating potential-energy barriers. We investigate whether such a system can preferentially pump particles from one reservoir to the other, a process often called "quantum pumping." We show how to make a "particle diode" which under specified conditions permits net particle pumping in only one direction. Then we examine systems having symmetric barriers. We find that if all initial particle energies are considered, a system with symmetric barriers cannot preferentially pump particles. However, if only finite initial energy bands are considered, the system can create net particle transport in either direction. We study the system classically, semiclassically, and quantum mechanically, and find that the quantum description cannot be fully understood without the insight gained from classical and semiclassical analysis.

17 pages, 15 figures

References in corpus (6)

• Hysteresis in a quantized, superfluid atomtronic circuit
• A millisecond quantum memory for scalable quantum networks
• Adiabatic pumping through interacting quantum dots
• Principles of an Atomtronic Battery
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Cited by in corpus (2)

• Matter, Energy, and Heat Transfer in a Classical Ballistic Atom Pump
• Dynamical Resonances and Stepped Current in an Attractive Quantum Pump