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Quantum Computation by Optically Coupled Steady Atoms/Quantum-Dots Inside a Quantum CavityWe present a model for quantum computation using $n$ steady 3-level atoms kept inside a quantum cavity, or using $n$ quantum-dots (QDs) kept inside a quantum cavity. In this model one external laser is pointed towards all the atoms/QDs, and $n$ pairs of electrodes are addressing the atoms/QDs, so that each atom is addressed by one pair. The energy levels of each atom/QD are controlled by an external Stark field given to the atom/QD by its external pair of electrodes. Transition between two energy levels of an individual atom/ QD are controlled by the voltage on its electrodes, and by the external laser. Interactions between two atoms/ QDs are performed with the additional help of the cavity mode (using on-resonance condition). Laser frequency, cavity frequency, and energy levels are far off-resonance most of the time, and they are brought to the resonance (using the Stark effect) only at the time of operations. Steps for a controlled-NOT gate between any two atoms/QDs have been described for this model. Our model demands some challenging technological efforts, such as manufacturing single-electron QDs inside a cavity. However, it promises big advantages over other existing models which are currently implemented, and might enable a much easier scale-up, to compute with many more qubits.
Document ID
Document Type
Conference Paper
Pradhan, P. (California Univ. Los Angeles, CA United States)
Wang, K. L. (California Univ. Los Angeles, CA United States)
Roychowdhury, V. P. (California Univ. Los Angeles, CA United States)
Anantram, M. P. (MRJ Technology Solutions, Inc. Moffett Field, CA United States)
Mor, T. (MRJ Technology Solutions, Inc. Moffett Field, CA United States)
Saini, Subhash
Date Acquired
August 20, 2013
Publication Date
January 1, 1999
Subject Category
Atomic and Molecular Physics
Meeting Information
American Physical Society Meeting(Atlanta, GA)
Funding Number(s)
PROJECT: RTOP 519-40-12
Distribution Limits
Work of the US Gov. Public Use Permitted.