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Vibrational molecular quantum computing: basis set independence and theoretical realization of the Deutsch-Jozsa
Carmen M Tesch1, Regina de Vivie-Riedle
1MPI für Quantenoptik, D-85741 Garching, Germany.
The Journal of Chemical Physics
|December 21, 2004
Summary
This study enhances quantum gate performance in molecular systems by correcting phase errors. Optimized laser pulses and a multitarget approach improve quantum algorithm accuracy and basis set independence.
Area of Science:
- Quantum Computing
- Molecular Quantum Gates
- Femtosecond Laser Pulses
Background:
- Quantum gate phase is critical for quantum algorithm implementation.
- Molecular systems offer a platform for realizing quantum gates.
- Femtosecond laser pulses are used for optimal control of molecular quantum gates.
Purpose of the Study:
- Investigate phase evolution of global molecular quantum gates.
- Develop methods to correct for phase-dependent quantum yield decrease.
- Enhance accuracy and basis set independence of molecular quantum gates.
Main Methods:
- Utilized a modified multitarget optimal control algorithm for laser field calculation.
- Employed vibrational modes of acetylene as a two-qubit system.
- Incorporated quantum phase pressure into the multitarget optimal control approach.
Main Results:
- Demonstrated significant phase dependence affecting quantum yield for a Pi gate.
- Successfully corrected phase errors, enhancing global quantum gate accuracy.
- Established a direct link between phase correction and basis set independence in molecular quantum gates.
Conclusions:
- Phase-corrected molecular quantum gates are essential for robust quantum computation.
- The developed methods improve the performance of molecular qubits.
- Validated the approach by implementing the Deutsch-Jozsa algorithm in a molecular model system.