# Tan's two-body contact across the superfluid transition of a planar Bose gas.

@article{Zou2021TansTC, title={Tan's two-body contact across the superfluid transition of a planar Bose gas.}, author={Yi-Quan Zou and Brice Bakkali-Hassani and C{\'e}dric Maury and {\'E} Le Cerf and S. Nascimbene and Jean Dalibard and J Beugnon}, journal={Nature communications}, year={2021}, volume={12 1}, pages={ 760 } }

Tan's contact is a quantity that unifies many different properties of a low-temperature gas with short-range interactions, from its momentum distribution to its spatial two-body correlation function. Here, we use a Ramsey interferometric method to realize experimentally the thermodynamic definition of the two-body contact, i.e., the change of the internal energy in a small modification of the scattering length. Our measurements are performed on a uniform two-dimensional Bose gas of 87Rb atoms… Expand

#### 5 Citations

Critical behavior of Tan’s contact for bosonic systems with a fixed chemical potential

- Physics, Medicine
- Journal of physics. Condensed matter : an Institute of Physics journal
- 2021

The paradigm of Bose–Einstein condensation is used to describe the low temperature properties of quasiparticles in the system known as triplons and it is shown that C is regular, while its derivatives are discontinuous at T c in accordance with Ehrenfest's classification of phase transitions. Expand

Quantum Gases in Optical Boxes

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- 2021

Advances in light shaping for optical trapping of neutral particles have led to the development of box traps for ultracold atoms and molecules. These traps have allowed the creation of homogeneous… Expand

Quantum Monte Carlo studies with microscopic two- and three-body interactions of a trimer scaling function

- 2021

Lucas Madeira, ∗ Tobias Frederico, Stefano Gandolfi, Lauro Tomio, and Marcelo T. Yamashita Instituto de F́ısica de São Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos, São Paulo,… Expand

Quantum Monte Carlo studies of a trimer scaling function with microscopic two- and three-body interactions

- Physics
- Physical Review A
- 2021

Lucas Madeira, ∗ Tobias Frederico, Stefano Gandolfi, Lauro Tomio, and Marcelo T. Yamashita Instituto de F́ısica de São Carlos, Universidade de São Paulo, CP 369, 13560-970 São Carlos, São Paulo,… Expand

Magnetic Dipolar Interaction between Hyperfine Clock States in a Planar Alkali Bose Gas.

- Physics, Medicine
- Physical review letters
- 2020

It is shown that a mixture of two such nonmagnetic states still displays magnetic dipole-dipole interactions comparable to the one expected for the other Zeeman states of the same atomic species. Expand

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