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Quantum Dots - Theory for Experiments

100%

Jacak L., Krasnyj J., Wójs A.

Acta Physica Polonica A

1997

vol. 92

issue 4

633-640

A simple model based on the effective-mass method and treating a quantum dot as a small irregularity of the periodic crystal field is developed and used for the description of the radiative recombination of an exciton captured in that quasi-zero-dimensional structure. The additional peaks appearing in the photoluminescence spectra at the critical quantum dot size are predicted as a consequence of the metastable excited states occurring in the energy spectrum of a confined exciton. The obtained dependence of the photoluminescence spectrum on the dot size and magnetic field reproduces well the available experimental results.

Model of Qubit in Multi-Electron Quantum Dot

88%

Jacak L., Krasnyj J., Jacak D., Salejda W., Mituś A.

Acta Physica Polonica A

2001

vol. 99

issue 2

277-292

The discussion of qubit for quantum computation in quantum dots technology is presented. The state-of-the-art structure of multi-electron dot is considered and the appropriate quasi-two-level system is suggested employing the singlet-triplet transition in the presence of magnetic field. The methods of qubit rotation (the write procedure) as well as two-qubit operations, as controlled-NOT, in vertically stacked dots system are analysed.

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2 Acta Physica Polonica A

1 2001

1 1997

2 Jacak L.

2 Krasnyj J.

1 Jacak D.

1 Mituś A.

1 Salejda W.

1 Wójs A.

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Quantum Dots - Theory for Experiments

Model of Qubit in Multi-Electron Quantum Dot