Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Quantum Electronics and Laser Science Conference

Exciton Rabi oscillation: coherently manipulate zero-dimensional quantum states by light

Hidehiko Kamada, Hideki Gotoh, H. Ando

Published Jun 25, 2003• 0 citations
Publisher

Abstract

Summary form only given. Optical Rabi oscillations are the most essential physics that coherent optical control of the quantum states relies on. Observation of the exciton population flopping thus can be a first step to the coherent control. In this contribution, we report the Rabi oscillation of an isolated excitonic two-level system in a disk-shaped In/sub x/Ga/sub 1-x/As quantum dot. Control of population and phase of single-dot exciton is demonstrated.

DOI
10.1109/qels.2002.1031357

Related papers

Exciton Rabi Oscillation in Single Isolated Quantum Dots

Hidehiko Kamada, Hideki Gotoh, Jiro Temmyo +2 more

The Rabi population oscillation of a single excitonic two-level system in an isolated InxGa1—xAs quantum dot was examined by quantum wave function interferometry in the time domain. The corresponding energy splitting was also confirmed in an energy-domain measurement. Two-pulse dipole interference on an excited excitonic state revealed a long-lived coherence of zero-dimensional excitonic states and demonstrated coherent population flopping under a strong optical field.

physica status solidi (a)•Apr 1, 2002•7 citations

Exciton Rabi Oscillation in a Single Quantum Dot

Hidehiko Kamada, Hideki Gotoh, Jiro Temmyo +2 more

A spectroscopic method, which enables characterization of a single isolated quantum dot and a quantum wave function interferometry, is applied to an exciton discrete excited state in an InGaAs quantum dot. Long coherence of zero-dimensional excitonic states made possible the observation of coherent population flopping in a 0D excitonic two-level system in a time-domain interferometric measurement. Corresponding energy splitting is also manifested in an energy-domain measurement.

Physical Review Letters•Nov 16, 2001•512 citations

Two-photon Rabi oscillations in a single In x Ga 1 − x As ∕ Ga As quantum dot

Stefan Stufler, Paweł Machnikowski, Patrick Ester +4 more

We report on Rabi oscillations of the biexciton in a single ${\mathrm{In}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}∕\mathrm{Ga}\mathrm{As}$ quantum dot, induced via a coherent two-photon process. In contrast to single-exciton Rabi oscillations the measured population oscillation is not purely sinusoidal in excitation pulse area. The experimental results are well reproduced by a theoretical calculation that relies only on the pulse shape and biexciton binding energy. Dephasing times of the biexciton are similar to those of the single exciton under the applied measurement conditions reaching up to $220\phantom{\rule{0.3em}{0ex}}\mathrm{ps}$.

Physical Review B•Mar 7, 2006•206 citations

Quantum gate operation of exciton qubits in semiconductor quantum dots

Hidehiko Kamada, Hideki Gotoh, Hiroaki Ando +2 more

Potential application of elementary excitation in semiconductor quantum dot to quantum computation is discussed. Construction of scalable hardware and all optical implementation of logical gate that exploits discrete nature of electron-hole states and their well concentrated oscillator strenth for ultrafast gate operation are proposed. Rabi population oscillation of an excitonic two-level system in an isolated single InxGa1-xAs quantum dot is manifested by a quantum wave function interferometry in time domain, demonstrating a long lived coherence of zero-dimensional excitonic states and revealed the coherent population flopping under strong optical field. A phase-sensitive coherent gate operation on single-dot exciton qubit is demonstrated.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jun 2, 2003•0 citations

Exciton Rabi oscillation in single quantum dot: temporal measurement of oscillation and corresponding energy level splitting

Hidehiko Kamada, H. Ando, T. Takagahara +1 more

A spectroscopic method, which enables characterization of a single isolated quantum dot and quantum wave function interferometry is applied to exciton discrete excited state in InGaAs quantum dot. Long coherence of zero-dimensional excitonic states made possible the observe coherent population flopping in a 0D excitonic two-level system in a time-domain interferometric measurement and corresponding energy splitting is also manifested in an energy-domain measurement.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)•Nov 13, 2002•0 citations

An All-Optical Quantum Gate in a Semiconductor Quantum Dot

Xiaoqin Li, Yanwen Wu, Duncan G. Steel +6 more

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 the optical control of spin qubits in dots.

Science•Aug 8, 2003•899 citations
Summary form only given. Optical Rabi oscillations are the most essential physics that coherent optical control of the quantum states relies on. Observation of the exciton population flopping thus can be a first step to the coherent control. In this contribution, we report the Rabi oscillation of an isolated excitonic two-level system in a disk-shaped In/sub x/Ga/sub 1-x/As quantum dot. Control of population and phase of single-dot exciton is demonstrated.
We report on Rabi oscillations of the biexciton in a single ${\mathrm{In}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}∕\mathrm{Ga}\mathrm{As}$ quantum dot, induced via a coherent two-photon process. In contrast to single-exciton Rabi oscillations the measured population oscillation is not purely sinusoidal in excitation pulse area. The experimental results are well reproduced by a theoretical calculation that relies only on the pulse shape and biexciton binding energy. Dephasing times of the biexciton are similar to those of the single exciton under the applied measurement conditions reaching up to 220ps220\phantom{\rule{0.3em}{0ex}}\mathrm{ps}220ps.
Potential application of elementary excitation in semiconductor quantum dot to quantum computation is discussed. Construction of scalable hardware and all optical implementation of logical gate that exploits discrete nature of electron-hole states and their well concentrated oscillator strenth for ultrafast gate operation are proposed. Rabi population oscillation of an excitonic two-level system in an isolated single InxGa1-xAs quantum dot is manifested by a quantum wave function interferometry in time domain, demonstrating a long lived coherence of zero-dimensional excitonic states and revealed the coherent population flopping under strong optical field. A phase-sensitive coherent gate operation on single-dot exciton qubit is demonstrated.
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 the optical control of spin qubits in dots.