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4 papers · 2 filters
Novel Differential Conductance Oscillations in Asymmetric Quantum Point Contacts
Hao Zhang, Phillip M. Wu, Albert M. Chang
Small differential conductance oscillations as a function of source-drain bias were observed and systematically studied in an asymmetric quantum point contact (QPC). These oscillat…
Emergence of step flow from atomistic scheme of epitaxial growth in 1+1 dimensions
Jianfeng Lu, Jian-Guo Liu, Dionisios Margetis
The Burton-Cabrera-Frank (BCF) model for the flow of line defects (steps) on crystal surfaces has offered useful insights into nanostructure evolution. This model has rested on phe…
A generalized multi-polaron expansion for the spin-boson model: Environmental entanglement and the biased two-state system
Soumya Bera, Ahsan Nazir, Alex W. Chin +2
We develop a systematic variational coherent state expansion for the many-body ground state of the spin-boson model, in which a quantum two-level system is coupled to a continuum o…
Transport Signatures of Majorana Quantum Criticality Realized by Dissipative Resonant Tunneling
Huaixiu Zheng, Serge Florens, Harold U. Baranger
We consider theoretically the transport properties of a spinless resonant electronic level coupled to strongly dissipative leads, in the regime of circuit impedance near the resist…