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Laboratory for Micro and Nanotechnology

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Imaging quantum many-body states

Low temperatures are a pre-requisite for the exploration of many quantum regimes of matter. This is the case because a condition must be reached where the energy associated to quantum fluctuations dominates over the thermal one. Quantum fluctuations can then condense and new electronic ground states emerge. These often feature complex phase diagrams and unconventional characteristics, such as superconducting or non-Fermi liquid properties, or also non-Abelian statistics. More generally, many of these macroscopic quantum many-body states entail coherence and superposition of states which can be tuned by non-thermal external parameters, such as static magnetic fields or electromagnetic field pulses.

SLAC_CoherentLockIn_FeSe
Greg Stewart/SLAC National Accelerator Laboratory

The difficulty of combining low-temperature sample environments with photon experiments stems from the radiative heat input, particularly in pump – probe schemes where a sample is not only probed, but also excited by an electromagnetic field pulse. Consequently, only few possibilities exist world-wide for low-temperature, photon-based inspection of electronic states.

Our focus is to realize bespoke sample environments and combine them with novel measurement schemes at PSI’s accelerator-based lightsources, namely at SwissFEL and the Cristallina-Q endstation, for structural and spectroscopic studies deep in the quantum limit. We aim at using high magnetic fields and/or employing coherent driving protocols to directly image electronic quantum many-body states via time-resolved x-ray scattering.

Project members

Dr. Jakub Vonka

Post-Doc

Quantum Technolgies & Sample Environment

+41 56 310 37 83
jakub.vonka@psi.ch
Pratyush Anand
pratyush.anand@psi.ch
Perrass Raphael
Raphael Perrass

Technician HF

+41 56 310 26 05
raphael.perrass@psi.ch
Bill Pedrini
Dr. Bill Francesco Pedrini

Scientist

+41 56 310 33 71
bill.pedrini@psi.ch
Gabiel Aeppli
Prof. Dr. Gabriel Aeppli

Head of Photon Science Division (PSD)
 

+41 56 310 42 32
gabriel.aeppli@psi.ch
Simon Gerber
Dr. Simon Gerber

Group Leader "Quantum Technologies" a.i.

+41 56 310 39 65
simon.gerber@psi.ch

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Contact

Dr. Simon Gerber

Laboratory for Micro-
and Nanotechnology
Paul Scherrer Institut
5232 Villigen PSI
Switzerland

Telephone:
+41 56 310 
Telefax:
+41 56 210 2646
E-mail:
simon.gerber@psi.ch
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