Towards a dephasing diode: asymmetric and geometric dephasing

Abstract

We study the effect of a noisy environment on spin and charge transport in ballistic quantum wires with spin-orbit coupling (Rashba coupling). We find that the wire then acts as a ``dephasing diode'', inducing very different dephasing of the spins of right and left movers. We also show how Berry phase (geometric phase) in a curved wire can induce such asymmetric dephasing, in addition to purely geometric dephasing. We propose ways to measure these effects through spin detectors, spin-echo techniques, and Aharanov-Bohm interferometry.

4 pages (2 fig) v2: extensive improvements to "readability" & references added

References in corpus (11)

• Non-ballistic spin field-effect transistor
• Observation of Berry's Phase in a Solid State Qubit
• Spin Accumulation in Quantum Wires with Strong Rashba Spin-Orbit Coupling
• Spin-orbit interaction in symmetric wells with two subbands
• Geometric nature of the environment-induced Berry phase and geometric dephasing
• Nanospintronics with carbon nanotubes
• Berry phase in a non-isolated system
• Geometrical spin dephasing in quantum dots
• Controlling Spin Qubits in Quantum Dots
• Zero--Bias Anomaly in Finite Size Systems
• Aharonov-Bohm ring with fluctuating flux

Cited by in corpus (5)

• Charge sensing amplification via weak values measurement
• Measurement of geometric dephasing using a superconducting qubit
• Suppression of non-adiabatic phases by a non-Markovian environment: easier observation of Berry phases
• Reservoir-Free Decoherence in Flying Qubits
• Non-adiabatic geometric phases and dephasing in an open quantum system