Coexisting spin and Rabi oscillations at intermediate time regimes in electron transport through a photon cavity

Area of Science:

• Quantum physics
• Condensed matter physics
• Nanotechnology

Background:

• Quantum dots are crucial in nanoscale electronics.
• Understanding charge transport dynamics is key for quantum devices.
• Photon cavities influence quantum system behavior.

Purpose of the Study:

• To theoretically model time-dependent transport in an asymmetric double quantum dot system.
• To investigate the effects of a transverse magnetic field on charge and spin dynamics.
• To differentiate between Coulomb blocking and photon-assisted transport regimes.

Main Methods:

• Time-dependent theoretical modeling of quantum transport.
• Solving a Markovian master equation in the dressed-states picture.
• Incorporating Coulomb interaction and a transverse magnetic field.

Main Results:

• Coexistence of interdot Rabi oscillations and spin-dependent non-equilibrium fluctuations under magnetic field.
• Rabi oscillations induce charge oscillations and phase differences in currents.
• Distinction observed in steady-state correlation functions between different transport regimes.

Conclusions:

• The study provides insights into complex quantum transport phenomena in nanostructures.
• Magnetic fields significantly alter dynamics, leading to observable effects like charge oscillations.
• Theoretical framework helps distinguish between different quantum transport mechanisms.