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Schrödinger cat states in quantum-dot-cavity systems

Title data

Cosacchi, Michael ; Seidelmann, Tim ; Wiercinski, J. ; Cygorek, M. ; Vagov, Alexei ; Reiter, D. E. ; Axt, Vollrath Martin:
Schrödinger cat states in quantum-dot-cavity systems.
In: Physical Review Research. Vol. 3 (May 2021) Issue 2 . - Art.Nr. 023088.
ISSN 2643-1564
DOI: https://doi.org/10.1103/PhysRevResearch.3.023088

Project information

Project financing: Deutsche Forschungsgemeinschaft
University of Bayreuth Open Access Publishing fund

Abstract in another language

A Schrödinger-cat state is a coherent superposition of macroscopically distinguishable quantum states, in quantum optics usually realized as superposition of coherent states. Protocols to prepare photonic cats have been presented for atomic systems. Here we investigate in what manner and how well the preparation protocols can be transferred to a solid-state platform, namely, a semiconductor quantum-dot–cavity system. In quantum-dot– cavity systems there are many disruptive influences like cavity losses, the radiative decay of the quantum dot, and the coupling to longitudinal acoustic phonons. We show that for one of the protocols these influences kill the quantum coherence between the states forming the cat, while for a second protocol a parameter regime can be identified where the essential characteristics of Schrödinger-cat states survive the environmental influences under conditions that can be realized with current equipment.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: non-classical light; Schrödinger cats; optical cavities; quantum emitters; quantum entanglement; quantum optics; photon entanglement
Subject classification: condensed matter physics (theoretical)
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: 10 Jun 2021 11:43
Last Modified: 10 Jun 2021 11:43
URI: https://eref.uni-bayreuth.de/id/eprint/65799