Abstract
We show how the use of optimally shaped pulses to guide the time evolution of a system (‘coherent control’) can be an effective approach towards quantum computation logic. We demonstrate this with selective control of decoherence for a multilevel system with a simple linearly chirped pulse. We use a multiphoton density-matrix approach to explore the effects of ultrafast shaped pulses for two-level systems that do not have a single photon resonance, and show that many multiphoton results are surprisingly similar to the single-photon results. Finally, we choose two specific chirped pulses: one that always generates inversion and the other that always generates self-induced transparency to demonstrate an ensemble CNOT gate.
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Goswami, D. Decoherence control in quantum computing with simple chirped pulses. Pramana - J Phys 59, 235–242 (2002). https://doi.org/10.1007/s12043-002-0113-5
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DOI: https://doi.org/10.1007/s12043-002-0113-5