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Entanglement dynamics of two Ising-coupled qubits with nonperpendicular local driving fields

F. A. Calderon-Vargas, J. P. Kestner
2018 Physical review B  

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2017 pre-print
arXiv:1709.03537v1 fatcat:wlmapeprtnforg3y32lz7rrpde
2018 accepted
arXiv:1709.03537v2 fatcat:5wpeoblf25anrargd7tt2vat3q
We present an approximate analytical solution to the dynamic equation of two Ising-coupled qubits with oscillating classical control fields that are nonperpendicular to the static drift fields. This is a situation that has recently arisen in some solid-state experiments. With our solution we derive the analytical expressions for the local invariants as well as the local rotations needed to isolate a purely nonlocal gate. This determines the set of parameters that are required to generate any
more » ... angling gate. Moreover, we use our results to describe a recent experimental work on capacitively coupled singlet-triplet qubits in GaAs and discuss possible differences for a similar device in silicon.
doi:10.1103/physrevb.97.125311 fatcat:t6xkaxd4uvfstk4nhv4igxxfey
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Citation

F. A. Calderon-Vargas, J. P. Kestner. "Entanglement dynamics of two Ising-coupled qubits with nonperpendicular local driving fields." Physical review B 97.12 (2018)