Spin-based all-optical quantum computation with quantum dots: Understanding and suppressing decoherence
By Tommaso Calarco, Animesh Datta, P. Fedichev, E. Pazy, Peter Zoller. 2003
182 citations recorded by the source corpus.
We present an all-optical implementation of quantum computation using semiconductor quantum dots. Quantum memory is represented by the spin of an excess electron stored in each dot. Two-qubit gates are realized by switching on trion-trion interactions between different dots. State selectivity is achieved via conditional laser excitation exploiting Pauli exclusion principle. Read out is performed via a quantum-jump technique. We analyze the effect on our scheme's performance of the main imperfections present in real quantum dots: exciton decay, hole mixing, and phonon decoherence. We introduce an adiabatic gate procedure that allows one to circumvent these effects and evaluate quantitatively its fidelity.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/04320bb0021499655688aee80736f16f242c8877
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Nuclear spin physics in quantum dots: an optical investigation (2012, background): “Because of the valence band mixing due to the reduced symmetry of the dot (elongation, strain anisotropy, interfaces), a dominantly heavy hole state has a small light hole admixture (Belhadj et al., 2010; Calarco et al., 2003; Krizhanovskii et al., 2005).”
- Quantum dot Rabi rotations beyond the weak exciton–phonon coupling regime (2010, background): “[11], and therefore take a spectral density in the continuum limit of the form [11, 12, 49, 52, 62]”