The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
We study the energy level crossing behavior in two-dimensional quantum well with the Rashba and Dresselhaus spin-orbit couplings (SOCs). By mapping the SOC Hamiltonian onto an anisotropic Rabi model, we obtain the approximate ground state and its quantum Fisher information (QFI) via performing a unitary transformation. We find that the …