Communication: Engineered tunable decay rate and controllable dissipative dynamics
- Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)
We investigate the steering dissipative dynamics of a two-level system (qubit) by means of the modulation of an assisted tunneling degree of freedom which is described by a quantum-oscillator spin-boson model. Our results reveal that the decoherence rate of the qubit can be significantly suppressed and simultaneously its quality factor is enhanced. Moreover, the modulated dynamical susceptibility exhibits a multi-peak feature which is indicative of the underlying structure and measurable in experiment. Our findings demonstrate that the interplay between the combined degrees of freedom and the qubit is crucial for reducing the dissipation of qubit and expanding the coherent regime of quantum operation much large. The strategy might be used to fight against deterioration of quantum coherence in quantum information processing.
- OSTI ID:
- 22047184
- Journal Information:
- Journal of Chemical Physics, Vol. 136, Issue 12; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coupled-Channels Approach for Dissipative Quantum Dynamics in Near-Barrier Collisions
Dissipative quantum dynamics in low-energy collisions of complex nuclei