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Accuracy of gates in a quantum computer based on vibrational eigenstates
1Chemistry Department, Marquette University, Wehr Chemistry Building, Milwaukee, WI 53201-1881, USA.
The Journal of Chemical Physics
|October 16, 2004
Summary
This study models quantum computers using molecular vibrations for qubits and laser pulses for gates. Careful selection of molecular and pulse properties can achieve 99.9% accurate quantum gates.
Area of Science:
- Quantum Computing
- Molecular Physics
- Laser Science
Background:
- Quantum computers leverage quantum phenomena for computation.
- Molecular vibrational states offer a promising platform for quantum information processing.
- Shaped laser pulses are crucial for implementing quantum logic gates.
Purpose of the Study:
- To develop a model for studying quantum computer properties using molecular vibrational eigenstates.
- To investigate factors influencing the accuracy of quantum gates.
- To optimize laser pulse shaping for high-fidelity qubit transformations.
Main Methods:
- Development of a computational model for quantum gate accuracy.
- Application of optimal control theory to design shaped laser pulses.
- Numerical time-propagation of molecular wave packets.
Main Results:
- Identified key parameters affecting quantum gate accuracy, including molecular anharmonicity and pulse characteristics.
- Demonstrated that precise control over these parameters leads to high-fidelity quantum gates.
- Achieved a maximum quantum gate accuracy of 99.9%.
Conclusions:
- Molecular vibrational states are viable for quantum information bits.
- Optimized laser pulse shaping is essential for accurate quantum gate operations.
- Careful parameter selection in this system can yield highly accurate quantum computations.