Quantum-enhanced sensing of axion dark matter with a transmon-based single microwave photon counter

International audienceWe report an axion dark matter search with a haloscope equipped with a microwave photon counter. The haloscope is a tunable high quality factor 3-dimensional microwave cavity placed in a magnetic field. The photon counter, operated cyclically, maps an incoming microwave photon onto the state of a superconducting transmon qubit. The measurement protocol continuously monitors the power emitted by the haloscope cavity as well as the dark count background, and enables tuning of the cavity frequency to probe different axion masses. With this apparatus we enhance by a factor 20 the search speed that can be reached with quantum-limited linear amplifiers, and set a new standard for probing the existence of axions with resonant detectors

Material and integration challenges for large scale Si quantum computing

International audienceSi spin qubits are very promising to enable large scale quantum computing as they are fast, of high quality and small. However, they are still lagging behind in terms of number of qubits. Indeed there are material and integration challenges to be tackled before fully expressing their potential

Challenges and perspectives in the modeling of spin qubits

International audienc

Ethical issues of bioarchaeology in Southeast Asia

Since the 1990s there has been an increase in bioarchaeological research in many parts of Southeast Asia by both locals and non-locals. Southeast Asian countries are characterised by varied social, cultural and political histories, but there are also some broad similarities in terms of poor economic development that limits much local research, and strong nationalism and rigid bureaucratic procedures for research. All have implications for non-local and local bioarchaeological research. Despite the growth in bioarchaeological research, the ethics of the practice of bioarchaeology in this region remain relatively underexplored. This chapter presents some of the main ethical issues of research with human remains in the region focusing on the countries of Thailand, Myanmar, Cambodia and the Philippines, from a non-local and local researcher viewpoint. We review a range of ethical issues, including the varied way different cultures respond to bioarchaeological work, local-non-local partnership in research, community archaeology, bioarchaeological methods including post-excavation management, and looting of archaeological sites. With the recent development of local expertise in bioarchaeology in the region, the repatriation of skeletal samples to Thailand, the increase in local training, and partnerships between local and non-local bioarchaeologists, there is much promise for the further development of local research in the field