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Molecular orientation with combinations of near-single-cycle THz and non-resonant laser pulses is studied by means of optimal control simulation with CO molecules at 5 K. We optimize non-resonant laser pulses with optimally determined final times while assuming fixed THz pulses and focusing on the carrier-envelope phase (CEP) effects. Although almost the same high degrees of orientation are achieved by the combined control independent of CEPs, the structures of the optimal non-resonant laser pulses considerably depend on CEPs and the central frequencies of the THz pulses. From a practical viewpoint, simplified treatments are also discussed. [ABSTRACT FROM AUTHOR]

Abstract: We numerically study molecular quantum computation using qubits that are implemented in the vibrational states of I2. Logical gate operations are realized by laser pulses designed by an optimal control method within the density matrix formalism. Optimally designed gate pulses are shown to act as universal gates through a case study of the simulation of the Deutsch–Jozsa algorithm. [Copyright &y& Elsevier]

A hybrid quantum control scheme that combines incoherent excitation processes with coherent excitation processes in desorption induced by multiple electronic transitions (DIMET) is proposed on the basis of optimal control theory. The desorption is induced by hot electrons (incoherent excitation), while the initial configuration and/or kinetic energy of the adsorbate complex is coherently controlled by optimal IR pulses. To show its effectiveness, the results of application of this hybrid control to a `toy model'' representing DIMET of NO/Pt(1 1 1) are presented by solving the pulse design equations under the influence of strong dissipation. [Copyright &y& Elsevier]