86 citations · 541 across the 36 of their papers we have counts for
5 papers · 1 filter
Conditions for Vanishing Central-well Population in Triple-well Adiabatic Transport
Tomas Opatrny, Kunal K. Das
Analytical expressions are derived for coherent tunneling via adiabatic passage (CTAP) in a triple well system with negligible central-well population at all times during the trans…
What is Quantum in Quantum Pumping: The Role of Phase and Asymmetries
Kunal K. Das, Tomas Opatrny
We show that quantum pumping does not always require a quantum description or a quantum phase. Quantum pumping is shown to encompass different types of processes, some of which int…
A Quantum Singlet Pump
Kunal K. Das
We provide provide a detailed study of biasless coherent transport of singlet electron pairs in one-dimensional (1D) channels induced by electron-electron interactions that are tim…
Adiabatic quantum pumping in an Aharonov-Bohm loop and in a Si-like nanowire: Role of interference in real space and in momentum space
Sungjun Kim, Kunal K. Das, Ari Mizel
We study the consequences of interference effects on the current generated by adiabatic quantum pumping in two distinct one-dimensional (1D) lattice model. The first model contains…
Adiabatic quantum pumping of a desired ratio of spin current to charge current
Sungjun Kim, Kunal K. Das, Ari Mizel
We present a prescription for generating pure spin current or spin selective current, based on adiabatic quantum pumping in a tight-binding model of a one dimensional conductor. A…