Publications (6)
Indirect spin dephasing via charge state decoherence in optical control schemes in quantum dots
A. Grodecka, P. Machnikowski, J. Förstner
We demonstrate that an optically driven spin of a carrier in a quantum dot undergoes indirect dephasing via conditional optically induced charge evolution even in the absence of an…
Theoretical study of phonon-assisted singlet-singlet relaxation in two-electron semiconductor quantum dot molecules
A. Grodecka, P. Machnikowski, J. Förstner
Phonon-assisted singlet-singlet relaxation in semiconductor quantum dot molecules is studied theoretically. Laterally coupled quantum dot structures doped with two electrons are co…
Interplay and optimization of decoherence mechanisms in the optical control of spin quantum bits implemented on a semiconductor quantum dot
A. Grodecka, C. Weber, P. Machnikowski +1
We study the influence of the environment on an optically induced rotation of a single electron spin in a charged semiconductor quantum dot. We analyze the decoherence mechanisms r…
Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules
A. Grodecka, P. Machnikowski, J. Förstner
We study phonon-assisted electron tunneling in semiconductor quantum dot molecules. In particular, singlet-singlet relaxation in a two-electron doped structure is considered. The i…
Phonon-induced decoherence for a quantum dot spin qubit operated by Raman passage
K. Roszak, A. Grodecka, P. Machnikowski +1
We study single-qubit gates performed via stimulated Raman adiabatic passage (STIRAP) on a spin qubit implemented in a quantum dot system in the presence of phonons. We analyze the…
Partly noiseless encoding of quantum information in quantum dot arrays against phonon-induced pure dephasing
A. Grodecka, P. Machnikowski
We show that pure dephasing of a quantum dot charge (excitonic) qubit may be reduced for sufficiently slow gating by collectively encoding quantum information in an array of quantu…