Mathematical Physics and Nanometer Structure Consortium, nmC@LU, Lund University, Box 118, 22100 Lund, Sweden.
Phys Rev Lett. 2013 Feb 22;110(8):085303. doi: 10.1103/PhysRevLett.110.085303. Epub 2013 Feb 21.
Cold-atom systems offer a great potential for the future design of new mesoscopic quantum systems with properties that are fundamentally different from semiconductor nanostructures. Here, we investigate the quantum-gas analogue of a quantum wire and find a new scenario for the quantum transport: Attractive interactions may lead to a complete suppression of current in the low-bias range, a total current blockade. We demonstrate this effect for the example of ultracold quantum gases with dipolar interactions.
冷原子系统为未来设计具有与半导体纳米结构根本不同性质的新型介观量子系统提供了巨大的潜力。在这里，我们研究了量子线的量子气体类似物，并发现了一种新的量子输运情景：吸引力相互作用可能导致在低偏压范围内完全抑制电流，即完全电流阻塞。我们以具有偶极相互作用的超冷量子气体为例证明了这种效应。
