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Bulletin of the American Physical Society

Quantum Optics with Colloidal Nanocrystals in Solution

David Bussian, Anton V. Malko, Yongfen Chen, Jennifer Ann Hollingsworth, Han Htoon, Victor Klimov

Published Mar 11, 2008• 0 citations
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The present work evaluates the feasibility of quantum computing with exciton qubits in coupled colloidal semiconductor nanocrystals (NCs). A strategy for manipulating two-qubit states of colloidal NC hetero-dimers is described. We show that a sequence of laser pulses with the same photon energy can bring excitonic states of a nanocrystal hetero-dimer into entanglement and perform arbitrary qubit rotations (quantum gates). Our simulations of a realistic two-particle assembly of CdSe/CdS core/shell NCs demonstrate that such two-qubit gate operations can be driven by optical parametric oscillators with a theoretical error of 0.1%. A strategy for upscaling two-qubit hetero-dimers to N -qubit exciton gates in semiconductor NC assemblies is discussed.