Quantum pumping in deformable quantum dots

Abstract

The charge current pumped adiabatically through a deformable quantum dot is studied within the Green's function approach. Differently from the non-deformable case, the current shows an undefined parity with respect to the pumping phase ϕ. The unconventional current-phase relation, analyzed in the weak pumping regime, is due to a dynamical phase shift ϕ_D caused by the elastic deformations of the central region (classical phonons). The role of the quality factor Q of the oscillator, the effects induced by a mechanical resonance and the implications for current experiments on molecular systems are also discussed.

References in corpus (8)

• A tunable carbon nanotube electromechanical oscillator
• Electrical generation and absorption of phonons in carbon nanotubes
• Adiabatic pumping through interacting quantum dots
• Self-consistent theory of molecular switching
• Non-adiabatic pumping through interacting quantum dots
• Nanoampere pumping of Cooper pairs
• The charge shuttle as a nanomechanical ratchet
• Non adiabatic features of electron pumping through a quantum dot in the Kondo regime

Cited by in corpus (10)

• Signatures of the Current Blockade Instability in Suspended Carbon Nanotubes
• Magnetic effects on nonlinear mechanical properties of a suspended carbon nanotube
• Single-parameter adiabatic charge pumping in carbon nanotube resonators
• Noise-assisted Thouless pump in elastically deformable molecular junctions
• Adiabatic quantum pumping through surface states in 3D topological insulators
• Charge and heat transport of soft nanosystems in the presence of time-dependent perturbations
• Memory effects in adiabatic quantum pumping with parasitic nonlinear dynamics
• Parasitic pumping currents in an interacting quantum dot
• Ballistic atom pumps
• Theory of a peristaltic pump for fermionic quantum fluids