WUYUNQIMUGE, Yong-qiang LIAN, Hong-min LI, et al. Influences of Electric Field and Temperature on Ground-state Lifetime of Bound Polaron in Donor-center Quantum Dots. [J]. Chinese Journal of Luminescence 41(8):991-998(2020)
DOI:
WUYUNQIMUGE, Yong-qiang LIAN, Hong-min LI, et al. Influences of Electric Field and Temperature on Ground-state Lifetime of Bound Polaron in Donor-center Quantum Dots. [J]. Chinese Journal of Luminescence 41(8):991-998(2020) DOI: 10.37188/fgxb20204108.0991.
Influences of Electric Field and Temperature on Ground-state Lifetime of Bound Polaron in Donor-center Quantum Dots
The ground-state and excited-state energy and wave function of polaron in donor-center quantum dot with asymmetric Gaussian potential are derived by Lee-Low-Pines transformation and Pekar-type variational method
and then the two-level structure for a qubit is constructed. The measure of qubit decoherence time of quantum dots quantified by ground state decay time of two-state polaron is established
which is compared with the measure of qubit decoherence time of quantum dots quantified by polaron excited state decay time. And their physical mechanism is revealed. By studying the influence of dielectric constant ratio
electron-phonons coupling constant
temperature and electric field on the ground-state lifetime of bound polaron in the donor-center quantum dot with asymmetric Gaussian potential
the influence of material properties
temperature
electric field and other environmental factors on qubit decoherence of quantum dots is revealed.
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