An All-Optical Quantum Gate in a Semiconductor Quantum Dot
United States Naval Research Laboratory · University of Michigan · +2 more institutions
Abstract
We report coherent optical control of a biexciton (two electron-hole pairs), confined in a single quantum dot, that shows coherent oscillations similar to the excited-state Rabi flopping in an isolated atom. The pulse control of the biexciton dynamics, combined with previously demonstrated control of the single-exciton Rabi rotation, serves as the physical basis for a two-bit conditional quantum logic gate. The truth table of the gate shows the features of an all-optical quantum gate with interacting yet distinguishable excitons as qubits. Evaluation of the fidelity yields a value of 0.7 for the gate operation. Such experimental capability is essential to a scheme for scalable quantum computation by means of…
Citation impact
- FWCI
- 49.95
- Percentile
- 100%
- References
- 24
Authors
9- XLXiaoqin LiCorresponding
United States Naval Research Laboratory, University of Michigan, University of California San Diego, Michigan State University
- YWYanwen Wu
United States Naval Research Laboratory, University of Michigan, University of California San Diego, Michigan State University
- DGD. G. Steel
United States Naval Research Laboratory, University of Michigan, University of California San Diego, Michigan State University
- DGD. Gammon
United States Naval Research Laboratory, University of Michigan, University of California San Diego, Michigan State University
- THTodd H. Stievater
United States Naval Research Laboratory, University of Michigan, University of California San Diego, Michigan State University
Topics & keywords
- Physics
- Quantum gate
- Quantum computer
- Quantum dot
- Biexciton
- Qubit
- Quantum mechanics
- Rabi cycle
- Affordable and clean energy