Publications related to BCS-BEC crossover in two dimensions: a Quantum Monte Carlo study

Correlation properties of a one-dimensional repulsive Bose gas at finite temperature

We present a comprehensive study shedding light on how thermal fluctuations affect correlations in a Bose gas with contact repulsive interactions in one spatial dimension. The pair correlation function, the static structure factor, and the one-body density ...

IOP Publishing Ltd2023

Density-wave ordering in a unitary Fermi gas with photon-mediated interactions

Jean-Philippe Brantut, Timo Zwettler, Victor Youri Helson, Kevin Etienne Robert Roux, Hideki Konishi, Elvia Colella

A density wave (DW) is a fundamental type of long-range order in quantum matter tied to self-organization into a crystalline structure. The interplay of DW order with superfluidity can lead to complex scenarios that pose a great challenge to theoretical an ...

NATURE PORTFOLIO2023

Optomechanical response of a strongly interacting Fermi gas

Jean-Philippe Brantut, Timo Zwettler, Victor Youri Helson, Kevin Etienne Robert Roux, Hideki Konishi

We study a Fermi gas with strong, tunable interactions dispersively coupled to a high-finesse cavity. Upon probing the system along the cavity axis, we observe a strong optomechanical Kerr nonlinearity originating from the density response of the gas to th ...

AMER PHYSICAL SOC2022

Cavity Quantum Electrodynamics with strongly correlated fermions

Kevin Etienne Robert Roux

This thesis presents the first cavity quantum electrodynamics experiments performed with a degenerate gas of

^6

Li with strong atom-atom interactions. The first part of this manuscript describes the design and the building of the apparatus that has been e ...

EPFL2022

Hole-induced anomaly in the thermodynamic behavior of a one-dimensional Bose gas

Riccardo Rota

We reveal an intriguing anomaly in the temperature dependence of the specific heat of a one-dimensional Bose gas. The observed peak holds for arbitrary interaction and remembers a superfluid-to-normal phase transition in higher dimensions, but phase transi ...

SCIPOST FOUNDATION2022

State selective cooling of SU(N) Fermi gases

Frédéric Mila, Miklos Lajko

We investigate a species selective cooling process of a trapped SU(N) Fermi gas using entropy redistribution during adiabatic loading of an optical lattice. Using high-temperature expansion of the Hubbard model, we show that when a subset N-A < N of the si ...

AMER PHYSICAL SOC2021

Cavity-assisted preparation and detection of a unitary Fermi gas

Jean-Philippe Brantut, Victor Youri Helson, Kevin Etienne Robert Roux, Hideki Konishi

We report on the fast production and weakly destructive detection of a Fermi gas with tunable interactions in a high finesse cavity. The cavity is used both with far off-resonant light to create a deep optical dipole trap, and with near-resonant light to r ...

IOP PUBLISHING LTD2021

From hidden order to antiferromagnetism: Electronic structure changes in Fe-doped URu2Si2

Emmanouil Frantzeskakis, Ji Dai, Kevin Huang

In matter, any spontaneous symmetry breaking induces a phase transition characterized by an order parameter, such as the magnetization vector in ferromagnets, or a macroscopic many electron wave function in superconductors. Phase transitions with unknown o ...

NATL ACAD SCIENCES2021

Cavity-assisted preparation and detection of a unitary Fermi gas

Jean-Philippe Brantut, Victor Youri Helson, Kevin Etienne Robert Roux, Hideki Konishi

We report on the fast production and weakly destructive detection of a Fermi gas with tunable interactions in a high finesse cavity. The cavity is used both with far off-resonant light to create a deep optical dipole trap, and with near-resonant light to r ...

2020

Scaling of the superconducting gap with orbital character in FeSe

Timur Kim

We use high-resolution angle-resolved photoemission spectroscopy to map the three-dimensional momentum dependence of the superconducting gap in FeSe. We find that on both the hole and electron Fermi surfaces, the magnitude of the gap follows the distributi ...

2018

BCS-BEC crossover in two dimensions: a Quantum Monte Carlo study

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Correlation properties of a one-dimensional repulsive Bose gas at finite temperature

Density-wave ordering in a unitary Fermi gas with photon-mediated interactions

Optomechanical response of a strongly interacting Fermi gas

Cavity Quantum Electrodynamics with strongly correlated fermions

Hole-induced anomaly in the thermodynamic behavior of a one-dimensional Bose gas

State selective cooling of SU(N) Fermi gases

Cavity-assisted preparation and detection of a unitary Fermi gas

From hidden order to antiferromagnetism: Electronic structure changes in Fe-doped URu2Si2

Cavity-assisted preparation and detection of a unitary Fermi gas

Scaling of the superconducting gap with orbital character in FeSe

Cavity-assisted preparation and detection of a unitary Fermi gas

State selective cooling of SU(N) Fermi gases

Cavity Quantum Electrodynamics with strongly correlated fermions

Density-wave ordering in a unitary Fermi gas with photon-mediated interactions

Hole-induced anomaly in the thermodynamic behavior of a one-dimensional Bose gas

From hidden order to antiferromagnetism: Electronic structure changes in Fe-doped URu2Si2

Cavity-assisted preparation and detection of a unitary Fermi gas

Scaling of the superconducting gap with orbital character in FeSe

Correlation properties of a one-dimensional repulsive Bose gas at finite temperature

Optomechanical response of a strongly interacting Fermi gas