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Hyper Quantum Criticality

Total Cost €


EC-Contrib. €






Project "HyperQC" data sheet

The following table provides information about the project.


Organization address
postcode: 5232

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Switzerland [CH]
 Project website
 Total cost 2˙328˙648 €
 EC max contribution 2˙328˙648 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-CoG
 Funding Scheme ERC-COG
 Starting year 2016
 Duration (year-month-day) from 2016-12-01   to  2021-11-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    PAUL SCHERRER INSTITUT CH (VILLIGEN PSI) coordinator 2˙328˙648.00


 Project objective

Hyper Quantum Criticality – HyperQC is a major initiative with the aim of generating and controlling novel phases of correlated magnetic quantum matter, and of exploring them in high-precision experiments. A combination of new capabilities enabled by the development of instrumentation, pioneering ultra-fast studies and experiments on magnetic model materials will allow both the exploration of fundamental Hamiltonians and fully quantitative tests of quantum criticality in hyper-parameter space: temperature, magnetic field, pressure, energy, momentum and time. HyperQC - Challenge. Direct control of the dimensionality, symmetry, chemical potential and interactions in magnetic materials is achieved by a new experimental set-up combining high magnetic fields and pressures with ultra-low temperatures, which will be installed on neutron scattering instruments at the Swiss Spallation Neutron Source SINQ. Experiments on a number of magnetic model materials allow the realization and high-precision measurements of the multi-dimensional quantum critical properties of systems including magnon Bose-Einstein Condensates, spin Luttinger liquids and renormalized classical ordered phases, as well as of other many-body phenomena in quantum spin systems.

HyperQC – Vision. Experiments on the time-dependent, non-equilibrium properties of quantum magnets and quantum critical points are new. Ultra-short laser and X-ray pulses are able to alter and measure the lattice, spin, orbital and electronic properties of solids, which has been demonstrated in recent experiments on multiferroic materials and superconductors. The effects of such pulses on a number of well-characterized model quantum magnets will be investigated with the aim of studying the time-dependent dynamics of quantum critical systems for the first time.


year authors and title journal last update
List of publications.
2019 Pascal Puphal, Stephan Allenspach, Christian Rüegg, Ekaterina Pomjakushina
Floating Zone Growth of Sr Substituted Han Purple: Ba0.9Sr0.1CuSi2O6
published pages: 273, ISSN: 2073-4352, DOI: 10.3390/cryst9050273
Crystals 9/5 2019-09-13
2017 S. Ward, M. Mena, P. Bouillot, C. Kollath, T. Giamarchi, K. P. Schmidt, B. Normand, K. W. Krämer, D. Biner, R. Bewley, T. Guidi, M. Boehm, D. F. McMorrow, Ch. Rüegg
Bound States and Field-Polarized Haldane Modes in a Quantum Spin Ladder
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.118.177202
Physical Review Letters 118/17 2019-09-05
2018 Nejc Janša, Andrej Zorko, Matjaž Gomilšek, Matej Pregelj, Karl W. Krämer, Daniel Biner, Alun Biffin, Christian Rüegg, Martin Klanjšek
Observation of two types of fractional excitation in the Kitaev honeycomb magnet
published pages: 786-790, ISSN: 1745-2473, DOI: 10.1038/s41567-018-0129-5
Nature Physics 14/8 2019-09-05
2017 A. Biffin, Ch. Rüegg, J. Embs, T. Guidi, D. Cheptiakov, A. Loidl, V. Tsurkan, R. Coldea
Magnetic Field Dependence of Excitations Near Spin-Orbital Quantum Criticality
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.118.067205
Physical Review Letters 118/6 2019-09-05
2018 B. Wehinger, C. Fiolka, A. Lanza, R. Scatena, M. Kubus, A. Grockowiak, W. A. Coniglio, D. Graf, M. Skoulatos, J.-H. Chen, J. Gukelberger, N. Casati, O. Zaharko, P. Macchi, K. W. Krämer, S. Tozer, C. Mudry, B. Normand, Ch. Rüegg
Giant Pressure Dependence and Dimensionality Switching in a Metal-Organic Quantum Antiferromagnet
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.121.117201
Physical Review Letters 121/11 2019-09-05

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