Over the last years the exciting developments in the field of ultracold atoms confined in. Our simulator encodes spin in the hyperfine states of ultracold. The physics of quantum degenerate gases in optical lattices has rapidly grown to one. In particular, it has been employed to study topological phenomena in a variety of different platforms. A master thesis is a good opportunity to enter the field and learn more about our interdisciplinary research at the crossing between quantum optics and condensedmatter physics. Our research group at the physikalisches institut of heidelberg university performs fundamental research in the fields of quantum and atomic physics. A thouless quantum pump may therefore be regarded as a dynamical version of the integer quantum hall effect. Gyuboong jos group at hkust hong kong university of science and technology. Pdf elementary and topological excitations in ultracold. Thursday, november 14, in the lecture or before in h226 1 phase space density and density of states a crucial parameter of a quantum gas which we will soon need extensively to describe. Quantum mechanical phase imprinted on the system wave function while modifying external parameters. Download atomatom interactions in ultracold quantum gases book pdf free download link or read online here in pdf. Rotating ultracold quantum gases connecting repositories. Atomatom interactions in ultracold quantum gases pdf.
Quantum simulation of the hubbard model with ultracold. Starting from the basics such as atomic structure, atomlight interaction, laser cooling and trapping, the book then moves on to focus on the treatment of ultracold fermi gases, before turning to topics in quantum simulation using cold atoms in optical lattices. Robertorighini new quantum simulations with ultracold ytterbium gases. Quantum phase transition modulation in an atomtronic mott switch marie a mclain and lincoln d carr. For the ultracold fermionic atoms in optical\ud lattices, we propose two novel quantum phases. As a phenomenon of nature how does matter behave at very low temperatures. Quantum optics with quantum gases closes this gap and addresses phenomena. Competition between weak quantum measurement and many. The observed correlation function for a thermal cloud shows a bunching behavior, whereas the correlation is flat for a coherent sample. These quantum correlations are the atomic analog of the hanbury brown twiss effect. Atom counting in ultracold gases using photoionization and. Dipolar quantum gases, ferlaino group ultracold quantum matter, grimm group strongly correlated quantum. Ultracold atomic gases provide a fantastic platform to implement quantum simulators and investigate a variety of models initially introduced in condensed matter physics or other areas. All books are in clear copy here, and all files are secure so dont worry about it.
Pdf ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems. Pdf ultracold quantum gases in optical lattices researchgate. As experiments keep probing bec and ultracold fermi gases under an increasing variety of. Subwavelength spin excitations in ultracold gases created. Interaction control of ultracold alkalineearth atoms. Emphasis is given to the effect of interactions which play a crucial role, bringing the gas into a superfluid phase at low temperature. Ultracold quantum gases in threedimensional optical. The development of this new area bears a close resemblance to the development of quantum optics following. Ultracold quantum gases gauge transformation in quantum mechanics. Here, we present evidence of such a transition between dynamical phases in a coldatom quantum simulator of the collective heisenberg model. In particular, we are interested in questions related to how strong interactions, reduced dimensionality.
Physics on ultracold quantum gases peking universityworld. Creation of ultracold molecules from a fermi gas of atoms. The quest for ultracold fermi gases started shortly after the 1995 discovery, and quantum degeneracy in a gas of fermionic atoms was obtained in 1999. Ultracold quantum gases in triangular optical lattices. We have studied twobody correlations of atoms in an expanding cloud above and below the boseeinstein condensation threshold. New quantum simulations with ultracold ytterbium gases. Frustrated quantum magnetism with bose gases in triangular. Ultracold quantum matter ultracold atoms and quantum gases. Liu has always educated me very patiently with his deep and broad knowledge in physics. The same discrete scaling symmetry is expected for unitary quantum gas of bosons, which, if confirmed, will establish a unique and fascinating class of strongly interacting quantum systems. Preparation of an optically trapped fermifermi mixture of li6 and k40 atoms and characterization of the interspecies interactions by feshbach spectroscopy. Coherent control via periodic modulation, also known as floquet engineering, has emerged as a powerful experimental method for the realization of novel quantum systems with exotic properties. Vincent liu, for his continued guidance and support during my phd study.
A proposed paradigm for outofequilibrium quantum systems is that an analog of quantum phase transitions exists between parameter regimes of qualitatively distinct timedependent behavior. Dipolar quantum gases, ferlaino group ultracold quantum matter, grimm group strongly correlated quantum matter, nagerl group. Rudolf grimm is part of the center for ultracold atoms and quantum gases. Yigal ilin, shai tsesses, guy bartal, yoav sagi submitted on 10 apr 2020 abstract. Competition between weak quantum measurement and manybody dynamics in ultracold bosonic gases wojciech kozlowski, st. Ultracold quantum gases in optical lattices 21,22,23 have triggered a lot of interest owing to the close connection to solidstate systems and the perspective of possible applications in quantum. In our experiments, we use ultracold atom clouds to understand how complex quantum systems behave. Ultracold atomic gases going strong national science. Raman transitions are used in quantum simulations with ultracold atoms for cooling, spectroscopy and. The general focus is on the behaviour of socalled quantum fluids, i. For more information visit the web pages of the individual groups. In these dilute systems interactions are characterized by a single parameter, the swave scattering length. The high degree of controllability, the novel detection possibilities and the extreme.
The dynamics of a dilute ultracold atomic gas is dominated continue reading a. Central concept for the quantum simulation with neutral atoms berry phase. Pdf ultracold quantum gases in triangular optical lattices. A boseeinstein condensate is loaded into a threedimensional optical lattice potential formed by a standing wave laser light. Ultracold quantum fields provides a selfcontained introduction to quantum field theory for manyparticle systems, using functional methods throughout. Download fulltext pdf elementary and topological excitations in ultracold dipolar bose gases thesis pdf available december 2018 with 449 reads. Internationaldoctorateinatomic andmolecularphotonics cicloxxx coordinatore prof. Here, we report on the realization of such a topological charge pump using ultracold bosonic atoms that form a mott insulator in a dynamically controlled optical. Ultracold atoms and quantum gases research groups of f. Ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems.
Here we propose a feasible protocol to perform analog quantum simulation of frustrated antiferromagnetism with strong quantum fluctuations by using ultracold bose gases. From ultracold quantum gases to quantum chromodynamic plasmas. These socalled optical lattices act as versatile potential landscapes to trap ultracold quantum gases of bosons and fermions. Hanbury brown twiss effect for ultracold quantum gases. Journal of physics on strongly correlated quantum fluids.
A ytterbium quantum gas microscope with narrowline laser cooling ryuta yamamoto, jun kobayashi, takuma kuno et al. Firstly, we show that a novel superconducting pairing occurs for spinimbalanced fermi gases with the spin up and down fermi levels lying within the px and s orbital bands of a quasionedimensional optical lattice. A quantum computer with even 50 qubits would allow quantum simulations that are out of the reach of classical computers. Ultracold bosonic and fermionic quantum gases are versatile and robust systems for probing fundamental condensedmatter physics problems112, as well as. Interactions in ultracold gases wiley online books. Ultracold quantum gases are proving to be a powerful model system for strongly interacting electronic manybody systems. The center is formed by three groups at the university of innsbruck and the austrian academy of sciences. This perspective explores how such atomic ensembles can help to unravel some of the outstanding open questions in the field. Pdf quantum simulations with ultracold quantum gases. Our research interests include quantum simulation with ultracold atoms, synthetic quantum materials, fermionic and bosonic quantum gases. Physics on ultracold quantum gases peking university. Feynman originally conceived for a quantum computer. Observation of a transition between dynamical phases in a.
Quantum simulations with ultracold quantum gases nature. Functional renormalization and ultracold quantum gases. In driven systems, the topological properties of the quasienergy bands can often be. Numerical methods for atomic quantum gases with applications to. In this novel quantum system we have been able to both realize a quantum phase transition from a super. We are particularly interested in fermionic cold atom gases as these can be used to model collective electronic processes in the solid state.
We are seeking for candidates with a good background in quantum mechanics and optics, and a strong interest in learning more about ultracold quantum gases. Read online atomatom interactions in ultracold quantum gases book pdf free download link book now. Subwavelength spin excitations in ultracold gases created by stimulated raman transitions. Atom counting in ultracold gases using photoionization and ion detection t. Pdf functional renormalization and ultracold quantum. One of the most promising applications of quantum simulation is the study of stronglycorrelated fermi gases, for which exact theoretical results are not always possible with stateoftheart approaches. Strongly interacting ultracold quantum gases springerlink. Because of the quantum statistics of fermions, a mixture of two componentsfor example, atoms in different internal spin statesis required to have swave interactions in the ultracold gas. The presentation is accessible to the general physics reader and includes discussions of the latest research developments in all three areas.
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