| タイトル | Quantum Computation by Optically Coupled Steady Atoms/Quantum-Dots Inside a Quantum Cavity |
| 著者（英） | Wang, K. L.; Pradhan, P.; Mor, T.; Anantram, M. P.; Saini, Subhash; Roychowdhury, V. P. |
| 著者所属（英） | MRJ Technology Solutions, Inc. |
| 発行日 | 1999-01-01 |
| 言語 | eng |
| 内容記述 | We 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. |
| NASA分類 | Atomic and Molecular Physics |
| 権利 | No Copyright |
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