A5003424639- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Physics of Superconductivity and Magnetism
- Atomic and Subatomic Physics Research
- Advanced Thermodynamics and Statistical Mechanics
- Quantum many-body systems
- Electronic and Structural Properties of Oxides
- Quantum Information and Cryptography
- Quantum and electron transport phenomena
University of Geneva
2023-2025
Cold atomic gases provide a remarkable testbed to study the physics of interacting many-body quantum systems. Temperatures are necessarily nonzero, but cooling ultralow temperatures needed for simulation purposes or even simply measuring directly on system can prove be very challenging tasks. Here, we implement thermometry strongly two- and one-dimensional Bose with high sensitivity in nanokelvin temperature range. Our method is aided by fact that decay first-order correlation function...
In this work, we extend the analysis of interacting bosons at 2D-1D dimensional crossover for finite size and temperature by using field theory approach <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mo>(</a:mo><a:mi>b</a:mi><a:mi>o</a:mi><a:mi>s</a:mi><a:mi>o</a:mi><a:mi>n</a:mi><a:mi>i</a:mi><a:mi>z</a:mi><a:mi>a</a:mi><a:mi>t</a:mi><a:mi>i</a:mi><a:mi>o</a:mi><a:mi>n</a:mi><a:mo>)</a:mo></a:mrow></a:math> quantum Monte Carlo simulations. Stemming from fact that...
Correlated electron states are at the root of many important phenomena including unconventional superconductivity (USC), where pairing arises from repulsive interactions. Computing properties correlated electrons, such as critical temperature Tc for onset USC, efficiently and reliably microscopic physics with quantitative methods remains a major challenge almost all models materials. In this theoretical work, we combine matrix product (MPS) static mean field (MF) to provide solution...
Correlated electron states are at the root of many important phenomena including unconventional superconductivity (USC), where electron-pairing arises from repulsive interactions. Computing properties correlated electrons, such as critical temperature $T_c$ for onset USC, efficiently and reliably microscopic physics with quantitative methods remains a major challenge almost all models materials. In this theoretical work we combine matrix product (MPS) static mean field (MF) to provide...
Cold atomic gases provide a remarkable testbed to study the physics of interacting many-body quantum systems. They have started play major role as simulators, given high degree control that is possible. A crucial element by necessarily non-zero temperature. However cooling required ultralow temperatures or even simply measuring temperature directly on system can prove be very challenging tasks. Here, we implement thermometry strongly two- and one-dimensional Bose with sensitivity in...
Dimensionality plays an essential role in determining the nature and properties of a physical system. For quantum systems impact interactions fluctuations is enhanced lower dimensions, leading to great diversity genuine effects for reduced dimensionality. In most cases, dimension fixed some integer value. Here, we experimentally probe dimensional crossover from two one using strongly interacting ultracold bosons variable lattice potentials compare data ab-initio theory that takes into...