Backaction-evading techniques



Investigation of techniques (theory and experiment) to avoid limiting measurement back-action in precision metrology, e.g. quantum-optomechanics.

Contributions to QuantumFrontiers

  • Insights to the field of quantum optomechanics at vastly different scales: from quantum optics (micro-optomechanics) to interferometric gravitational wave detection (macroscopic optomechanics, 40 kg-scale mirrors)
  • Reduction of all-optical quantum radiation pressure noise (e.g. Coherent Quantum Noise Cancellation)
  • Laser power stabilisation via radiation pressure

Collaborative Innovation

  • Investigation of membrane-in-the-middle (MiM) / membrane-at-the-edge (MatE) optical resonators for quantum optomechanical experiments at room temperature and cryogenic temperatures (Heurs, LUH, AEI)
  • Testing micro-optomechanical oscillators for cavity experiments near and below the SQL (Heurs, LUH, AEI / Kroker TUBS, PTB)
  • Investigating levitated nanoparticles for gravimetry (C. Vogt, ZARM)

Scientific Output

  • Publications
    Schulte BW. Characterisation and integration of an optomechanical system for an all-optical CQNC experiment. Hannover: Leibniz Universität Hannover, 2023. 161 S. doi: 10.15488/15472
    Junker J, Wilken D, Johny N, Steinmeyer D, Heurs M. Frequency-Dependent Squeezing from a Detuned Squeezer. Physical review letters. 2022 Jul 14;129(3):033602. doi: 10.1103/physrevlett.129.033602
    Junker J, Wilken D, Huntington E, Heurs M. High-precision cavity spectroscopy using high-frequency squeezed light. Optics express. 2021 Feb 10;29(4):6053-6068. doi: 10.1364/OE.416713, 10.15488/11389
    Nery MT, Venneberg JR, Aggarwal N, Cole GD, Corbitt T, Cripe J et al. Laser power stabilization via radiation pressure. Optics letters. 2021 Apr 14;46(8):1946-1949. Epub 2021 Mär 18. doi: 10.1364/OL.422614
    Trad Nery M. Laser power stabilization via radiation pressure. Hannover: Leibniz Universität Hannover, 2021. doi: 10.15488/11012
    Trad Nery M. Laser power stabilization via radiation pressure. Nature Reviews Physics. 2021 Okt;3(10):677. Epub 2021 Aug 6. doi: 10.1038/s42254-021-00361-y, 10.15488/11012
    Evlyukhin AB, Matiushechkina M, Zenin VA, Heurs M, Chichkov B. Lightweight metasurface mirror of silicon nanospheres [Invited]. Optical materials express. 2020 Sep 30;10(10):2706-2716. doi: 10.1364/OME.409311, 10.15488/11391
    Nery MT, Danilishin SL, Venneberg JR, Willke B. Fundamental limits of laser power stabilization via a radiation pressure transfer scheme. Optics letters. 2020 Jul 10;45(14):3969-3972. Epub 2020 Jun 15. doi: 10.1364/OL.394547

TG Members

  • Involved Members and their Relevant Expertise
    Members Institution Relevant Expertise
    Nenad Kralj, Leader AEI Backaction-Evading Techniques; Optomechanics; Cryogenic environments
    Michèle Heurs AEI / LUH Backaction-Evading Techniques; high-frequency squeezed light sources at 1064 nm (“squeezing combs”); high-frequency, large-bandwidth, low-noise photodetection; optical and mechanical characterisation methods; Optical and multi-physics simulations and design; Cryogenic environments
    Roman Kossak AEI / LUH Optomechanically coupled resonators and interferometers in cryogenic environments
    Karsten Danzmann AEI / LUH Gravitational wave detection
    Benno Willke AEI Squeezed Light Sources; Advanced Light Sources; optical and mechanical characterisation methods
    Guido Müller AEI  
    Marina Trad Nery AEI / LUH Backaction-Evading Techniques
    Klemens Hammerer LUH Backaction-Evading Techniques; Quantum Optomechanics
    Mariia Matiushechkina AEI Backaction-evading techniques; Scattering processes in metamaterial structure; Optical simulations
    Bernd Schulte AEI optomechanical experiments at cryogenic temperatures
    Jonas Junker AEI squeezed light sources; backaction-evading techniques
    Dennis Wilken AEI squeezed light sources; backaction-evading techniques; photodetection
    Harald Lück AEI / LUH Sub-SQL interferometry; Next Generation Gravitational Wave Observatories; optical and mechanical characterisation methods
    David Wu AEI Sub-SQL interferometry
    Janis Wöhler AEI thermal noise interferometer
    Matteo Carlassara AEI Commissioning of the SQL Interferometer
    Jian Liu AEI Sub-Standard Quantum Limit Interferometry
    Johannes Lehmann AEI mirror supensions
    Christian Vogt ZARM Quantum optomechanics
    Juliane von Wrangel AEI fibre welding, bonding
    Nived Johny AEI Optomechanical experiments at cryogenic temprature
    Sara Al Kershi AEI  
    Luise Kranzhoff Maastricht University  
    Pratik Chakraborty AEI Optomechanical integration at cryogenic environments for Coherent Quantum Noise Cancellation, back action evading techniques
    Graziano Pascale AEI  
    Firoz Khan AEI  
    Tim Bartelsmeier AEI  
    Sara Al-Kershi AEI