Optical implementation of entangled multi-spin states in a CdTe quantum well
نویسندگان
چکیده
Ultrafast optical pulses and coherent techniques are used to create spin entangled states of non-interacting electrons bound to donors in a CdTe quantum well. Our method, relying on the exchange interaction between optically excited holes and the impurities, can in principle, be applied to entangle a large number of spins. Results are presented for resonant excitation of localized excitons below the gap, and above the gap where the signatures of entanglement are significantly enhanced. q 2003 Elsevier Ltd. All rights reserved. PACS: 03.67. 2 a; 75.50.Pp; 78.67.De; 42.50.Md
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