Enhancement and suppression of tunneling by controlling symmetries of a potential barrier

Abstract

We present a class of 2D systems which shows a counterintuitive property that contradicts a semi classical intuition: A 2D quantum particle "prefers" tunneling through a barrier rather than traveling above it. Viewing the one particle 2D system as the system of two 1D particles, it is demonstrated that this effect occurs due to a specific symmetry of the barrier that forces excitations of the interparticle degree of freedom that, in turn, leads to the appearance of an effective potential barrier even though there is no "real" barrier. This phenomenon cannot exist in 1D.

arXiv comment10 pages and 7 figures

References in corpus (6)

• Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction
• Quantum Transparency of Barriers for Structure Particles
• Metastable States of a Coupled Pair on a Repulsive Barrier
• Cooper-pair resonances and subgap Coulomb blockade in a superconducting single-electron transistor
• Enhancement and suppression of tunneling by controlling symmetries of a potential barrier
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Cited by in corpus (7)

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• Numerical simulations of quantum clock for measuring tunneling times
• Driving Spin-Boson Models From Equilibrium Using Exact Quantum Dynamics
• Few-fermion resonant tunneling and underbarrier trapping in asymmetric potentials