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Abstract
We show that tunneling involving bosonic wires and/or boson integer quantum Hall (bIQH) edges is characterized by features that are far more universal than those in their fermionic counterpart. Considering a pair of minimal geometries, we examine the tunneling conductance as a function of energy (e.g., chemical potential bias) at high and low energy limits, finding a low energy enhancement and a universal high versus zero energy relation that hold for all wire/bIQH edge combinations. Beyond this universality present in all the different topological (bIQH-edge) and nontopological (wire) setups, we also discover a number of features distinguishing the topological bIQH edges, which include a current imbalance to chemical potential bias ratio that is quantized despite the lack of conductance quantization in the bIQH edges themselves. The predicted phenomena require only initial states to be thermal and thus are well suited for tests with ultracold bosons forming wires and bIQH states. For the latter, we highlight a potential realization based on single component bosons in the recently observed Harper-Hofstadter band structure.
Original language | English |
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Article number | 245142 |
Journal | Physical Review B |
Volume | 93 |
DOIs | |
Publication status | Published - 22 Jun 2016 |
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Dive into the research topics of 'Universality and quantized response in bosonic mesoscopic tunneling'. Together they form a unique fingerprint.Projects
- 1 Finished
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Novel collective phenomena in Majorana fermion devices
Beri, B. (Principal Investigator)
Engineering & Physical Science Research Council
1/10/15 → 30/09/17
Project: Research Councils