Two new deterministic secure quantum communication protocols are proposed in this paper. In these protocols, utilizing auxilians, no particle is transported between two authorized parties, who guarantee the safety of the protocols.

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We propose a scenario to realize quantum computers utilizing heteronuclear diatomic rovibrational states as qubits. We focused on rovibrational qubits created by simple transform limited infrared laser pulse instead of using chirped pulse. Numerical calculations show that single qubit gate operation in the electronic ground state of LiH molecule can be obtained. We also discuss the effect of temperature on the initially rotational states, and a suitable experiment condition is indicated.