## Simultaneous Deterministic Control of Distant Qubits in Two Semiconductor Quantum Dots

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posted on 09.10.2013, 00:00 by A. Gamouras, R. Mathew, S. Freisem, D. G. Deppe, K. C. HallIn optimal quantum control (OQC),
a target quantum state of matter
is achieved by tailoring the phase and amplitude of the control Hamiltonian
through femtosecond pulse-shaping techniques and powerful adaptive
feedback algorithms. Motivated by recent applications of OQC in quantum
information science as an approach to optimizing quantum gates in
atomic and molecular systems, here we report the experimental implementation
of OQC in a solid-state system consisting of distinguishable semiconductor
quantum dots. We demonstrate simultaneous high-fidelity π and
2π single qubit gates in two different quantum dots using a
single engineered infrared femtosecond pulse. These experiments enhance
the scalability of semiconductor-based quantum hardware and lay the
foundation for applications of pulse shaping to optimize quantum gates
in other solid-state systems.