Thomas Hertog

Thomas Hertog is a Belgian theoretical physicist known for contributions to cosmology, string theory, and quantum gravity. He has held positions at leading institutions including University of Cambridge and the European Organization for Nuclear Research. His work on the quantum origin of the Universe and collaboration with Stephen Hawking has influenced research on the no-boundary proposal, inflation, and the landscape of string vacua.

Early life and education

Born in Brussels, Hertog studied physics and mathematics at the Université Libre de Bruxelles and later pursued graduate research at the University of Cambridge under supervisors active in theoretical physics and cosmology. During his formative years he interacted with researchers from the University of Oxford, Institute for Advanced Study, and the Max Planck Institute for Gravitational Physics (Albert Einstein Institute). His doctoral work was embedded in research environments linked to the Perimeter Institute for Theoretical Physics, the European Space Agency, and the Royal Society community of scholars.

Academic career and research

Hertog held academic positions at the University of Cambridge, the International School for Advanced Studies, and the Vrije Universiteit Brussel before joining the KU Leuven and research networks associated with the European Research Council. His research spans topics connecting general relativity and quantum mechanics via frameworks developed in string theory, AdS/CFT correspondence, and semiclassical approaches to quantum cosmology. He has collaborated with theorists from the California Institute of Technology, Harvard University, Princeton University, CERN, and the Kavli Institute for Theoretical Physics to study the role of cosmic inflation, primordial perturbations, and selection principles in the string theory landscape.

Collaboration with Stephen Hawking

Hertog is widely recognized for a sustained collaboration with Stephen Hawking that addressed foundational questions about the origin of the Universe using the no-boundary proposal originally advanced by James Hartle and Stephen Hawking. Together they developed models linking the no-boundary wave function to predictions for observable cosmic microwave background features and constraints on inflationary histories from the multiverse and string theory landscape. Their joint work brought together ideas from quantum field theory, Euclidean quantum gravity, and semiclassical techniques used in studies at the Institute for Advanced Study and Cambridge University Press-linked seminars, and was discussed in venues such as the Royal Society and International Astronomical Union meetings.

Major publications and theories

Hertog's publications include peer-reviewed articles in journals associated with the American Physical Society, Oxford University Press outlets, and collections from conferences at the Perimeter Institute and Kavli Institute for Theoretical Physics. Key papers with Hawking explored predictive frameworks for the cosmic microwave background and constraints on the number of e-folds in inflation by invoking the no-boundary proposal and selection effects in the string theory landscape. He has authored work on the interplay between brane cosmology, moduli stabilization, and semiclassical histories that reference developments in AdS/CFT correspondence by Juan Maldacena and extensions examined by Edward Witten, Gubser, and others. Hertog also contributed chapters in volumes alongside scholars from Cambridge University, Harvard University, and the Max Planck Society that synthesize perspectives on quantum cosmology, the multiverse, and observational implications for missions like the Planck and experiments at the Large Hadron Collider.

Awards and honours

Hertog's work has been recognized by prizes and fellowships connected to the European Research Council and scientific societies such as the Royal Society and national academies in Belgium. He has been invited to speak at flagship conferences organized by the International Union of Pure and Applied Physics, the International Astronomical Union, and workshops at the Perimeter Institute for Theoretical Physics and Kavli Institute for Theoretical Physics. His collaborations and publications have been cited in reviews compiled by institutions like the Institute of Physics, American Physical Society, and panels convened by the European Science Foundation.

Category:Belgian physicists Category:Theoretical physicists Category:Cosmologists Category:String theorists