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Main Title: Revisiting quantum feedback control: disentangling the feedback‐induced phase from the corresponding amplitude
Author(s): Barkemeyer, Kisa
Finsterhölzl, Regina
Knorr, Andreas
Carmele, Alexander
Type: Article
Language Code: en
Abstract: Coherent time‐delayed feedback allows the control of a quantum system and its partial stabilization against noise and decoherence. The crucial and externally accessible parameters in such control setups are the round‐trip‐induced delay time τ and the frequencies ω of the involved optical transitions which are typically controllable via global parameters like temperature, bias, or strain. They influence the dynamics via the amplitude and the phase𝜙=𝜔𝜏 of the feedback signal. These quantities are, however, not independent. Here, the aim is to control the feedback phase via a microwave pump field. Using the example of a Λ‐type three‐level system, it is shown that the Rabi frequency of the pump field induces phase shifts on demand and therefore increases the applicability of coherent quantum feedback control protocols.
Issue Date: 11-Oct-2019
Date Available: 26-Feb-2020
DDC Class: 530 Physik
Subject(s): non‐linear quantum electronics
quantum control
quantum dissipation
quantum optics
Sponsor/Funder: DFG, 163436311, SFB 910: Kontrolle selbstorganisierender nichtlinearer Systeme: Theoretische Methoden und Anwendungskonzepte
EC/H2020/734690/EU/Localized Surface Plasmon Resonance in doped semiconductor nanocrystals/SONAR
TU Berlin, Open-Access-Mittel - 2019
Journal Title: Advanced Quantum Technologies
Publisher: Wiley
Publisher Place: Weinheim
Volume: 3
Issue: 2
Article Number: 1900078
Publisher DOI: 10.1002/qute.201900078
EISSN: 2511-9044
Appears in Collections:AG Nichtlineare Optik und Quantenelektronik » Publications

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