Concept
Ground state
Related publications (209)
Thermodynamic properties of the Shastry-Sutherland model from quantum Monte Carlo simulations
We investigate the minus-sign problem that afflicts quantum Monte Carlo (QMC) simulations of frustrated quantum spin systems, focusing on spin S = 1/2, two spatial dimensions, and the extended Shastry-Sutherland model. We show that formulating the Hamilton ...
2018Dissipation as a resource in circuit quantum electromechanics
A primary challenge in quantum science and technology is to isolate the fragile quantum states from their environment in order to prevent the irreversible leakage of energy and information which causes decoherence. In the late 1990s, however, a new paradig ...
EPFL2018Correction of CCI cloud data over the Swiss Alps using ground-based radiation measurements
Alexis Berne, Fanny Alexia Jeanneret
The validation of long-term cloud data sets retrieved from satellites is challenging due to their worldwide coverage going back as far as the 1980s. A trustworthy reference cannot be found easily at every location and every time. Mountainous regions presen ...
Copernicus GmbH2018High Resolution Fourier Transform Infrared Spectroscopy of the Quantum Magnet LiTmF4
In fundamental interactions research, dipolar magnets are particularly interesting to study since they provide a large spectrum of quantum phenomena [1-2]. Magnetic dipolar interaction are omnipresent in magnetic systems. However, in most of materials, var ...
2018BiTeCl and BiTeBr: A comparative high-pressure optical study
Arnaud Magrez, Oleg Yazyev, Helmuth Berger, Philippe Bugnon, Ana Akrap, Gabriel Albert Autes
We here report a detailed high-pressure infrared transmission study of BiTeCl and BiTeBr. We follow the evolution of two band transitions: the optical excitation beta between two Rashba-split conduction bands, and the absorption. across the band gap. In th ...
Amer Physical Soc2017Amplified Optomechanical Transduction of Virtual Radiation Pressure
Here we describe how, utilizing a time-dependent optomechanical interaction, a mechanical probe can provide an amplified measurement of the virtual photons dressing the quantum ground state of an ultrastrongly coupled light-matter system. We calculate the ...
Amer Physical Soc2017Ultrafast dynamics of the photo-excited hemes b and c(n) in the cytochrome b(6)f complex
Adrien Alexis Paul Chauvet, Rachna Agarwal
The dynamics of hemes b and c(n) within the cytochrome b(6)f complex are investigated by means of ultrafast broad-band transient absorption spectroscopy. On the one hand, the data reveal that, subsequent to visible light excitation, part of the b hemes und ...
Royal Society of Chemistry2017Dimerization and exotic criticality in spin-S chains
In this thesis we have studied the emergence of spontaneously dimerized phases in frustrated spin-S chains, with emphasis on the nature of the critical lines between the dimerized and non-dimerized phases. The main numerical method used in this thesis is t ...
EPFL2017Correlation-driven transport asymmetries through coupled spins in a tunnel junction
Spin-spin correlations can be the driving force that favours certain ground states and are key in numerous models that describe the behaviour of strongly correlated materials. While the sum of collective correlations usually lead to a macroscopically measu ...
Nature Publishing Group2017Spin Polarization and Attosecond Time Delay in Photoemission from Spin Degenerate States of Solids
Jan Hugo Dil, Stefan Peter Muff, Mauro Fanciulli
After photon absorption, electrons from a dispersive band of a solid require a finite time in the photoemission process before being photoemitted as free particles, in line with recent attosecond-resolved photoemission experiments. According to the Eisenbu ...
American Physical Society2017