Control of spin blockade by ac magnetic fields in triple quantum dots

Maria Busl, Rafael Sánchez, Gloria Platero
2010 Physical Review B  
We analyze coherent spin phenomena in triple quantum dots in triangular configuration under crossed DC and AC magnetic fields. In particular, we discuss the interplay between Aharonov-Bohm current oscillations, coherent electron trapping and spin blockade under electron spin resonance conditions. We demonstrate that, for certain field frequencies, AC magnetic fields induce an antiresonant behavior in the current, allowing for both removal and restoration of entangled spin blockaded states by
more » ... ing the AC field frequency. Our theoretical predictions indicate how to manipulate spin qubits in a triangular quantum dot array.
doi:10.1103/physrevb.81.121306 fatcat:v6cpoipheze5bntxtuvclotary