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On-demand generation of higher-order Fock states in quantum-dot--cavity systems

Title data

Cosacchi, Michael ; Wiercinski, Julian ; Seidelmann, Tim ; Cygorek, Moritz ; Vagov, Alexei ; Reiter, Doris E. ; Axt, Vollrath Martin:
On-demand generation of higher-order Fock states in quantum-dot--cavity systems.
In: Physical Review Research. Vol. 2 (2020) Issue 3 . - No. 033489.
ISSN 2643-1564
DOI: https://doi.org/10.1103/PhysRevResearch.2.033489

Official URL: Volltext

Project information

Project financing: Alexander von Humboldt-Stiftung
Deutsche Forschungsgemeinschaft

Abstract in another language

The on-demand preparation of higher-order Fock states is of fundamental importance in quantum information sciences. We propose and compare different protocols to generate higher-order Fock states in solid state quantum-dot–cavity systems. The protocols make use of a series of laser pulses to excite the quantum dot exciton and off-resonant pulses to control the detuning between dot and cavity. Our theoretical studies include dot and cavity loss processes as well as the pure-dephasing type coupling to longitudinal acoustic phonons in a numerically complete fashion. By going beyond the two-level approximation for quantum dots, we study the impact of a finite exchange splitting, the impact of a higher energetic exciton state, and an excitation with linearly polarized laser pulses leading to detrimental occupations of the biexciton state. We predict that under realistic conditions, a protocol which keeps the cavity at resonance with the quantum dot until the desired target state is reached is able to deliver fidelities to the Fock state |5⟩ well above 40%.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Quantum dot; Non-classical light; Dot cavity systems; Preparation of non-classic photon states; Higher order Fock states; Path-integrals; Microcavity; Nonlinear optics; Ultrafast dynamics; Pure dephasing; Phonons; Decoherence; Excitons; Biexcitons; Non-Markovian dynamics; Memory effects; Phonon-induced memory; Multi-phonon processes; Quantum dissipative dynamics; Numerically exact; Lindblad operators; Non-Hamiltonian dynamics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 28 Sep 2020 08:33
Last Modified: 28 Sep 2020 08:33
URI: https://eref.uni-bayreuth.de/id/eprint/57670