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    EXC 3120 BlueMat - Cross Area Exploitation & Experiencing
    Our vision is to make Blue Materials not only useful but also to spark fascination among scientists and the general public. In RF Exploitation, we aim to translate Blue- Mat’s results into real-world applications, including the production of substantial quantities of Blue Materials (Obj. 3). In RF Experiencing we will develop innovative ways to evoke public interest in the diversity and dynamics of water in materials through artistic formats and virtual reality. By creating contact zones for scientists and artists we will build a unique creative environment where scientific and artistic methodologies come into dialogue to unfold new dimensions for co-creation.
      34
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    EXC 3120 BlueMat - Research Topic C1: Tunable Microwave and MIR Permittivity by Control of Water Distribution
    The nanoporous structures considered in BlueMat are orders of magnitude smaller than the wavelength of microwave and MIR radiation. Thus, we will utilize water-driven materials in the effective medium regime. In the microwave range, bulk water has a high permittivity of 80, attributed to the reorientation of water dipoles. The permittivity is expected to become anisotropic at interfaces, with the component orthogonal to the interface reducing to 2. Utilizing samples with anisotropic porosity, e.g., porous silica and alumina, we envisage for the first time experimentally clarifying this water anisotropy. In the MIR range, the permittivity of bulk water reduces to 2, but water is characterized by significant absorption with an attenuation length in the order of 10 ?m. We intend to employ polyolefin aerogels, which have intrinsically high transmittance in the MIR range, and add optical tunability via reversible adsorption of water on the surface of the aerogel. The key scientific questions are: How can we control the complex permittivity of water and its anisotropy by nanoconfinement? How can we utilize water and its confinement to tune the effective permittivity of nanostructured media? How can we utilize these effects to switch microwaves and thermal radiation?
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    Hamburg Quantencomputing HQC - Teilprojekt P08: Quantum Computer Hardware: High-Frequency Excitation
    To excite defined quantum states, high-frequency signals are required. The challenge lies in generating these signals with defined amplitudes and phases, delivering kilowatt-level power at frequencies in the double-digit gigahertz range. Current demonstrators typically rely on high-quality laboratory measurement technology and signal sources, which are both expensive and not tailored to the specific application. Therefore, a flexible and quantum-computer-specific high-frequency signal source is to be designed, allowing for cost-efficient and compact excitation of defined quantum states. Initially, the required output power will be generated using a commercial amplifier. The signal generation is based on a software-defined radio approach, enabling extremely fast control of magnitude and phase programmatically, depending on the real signals influenced by non-idealities of the entire quantum computer. Alongside this digital control electronics, the actual signal generation and measurement technology for the non-ideal signal properties are the main focus. Close collaboration with the research group led by PI Riedinger (UHH) is planned.
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