Research laboratory for ultracold quantum gases hkust. Like dancers in a chorus line, atoms movements become synchronized when lowered to extremely cold temperatures. Quantum gases lectures university of amsterdam homepages of. For example, the control of interactions has led to the.
Publications laboratory for ultracold quantum gases hkust. There are over 100 experiments on ultracold quantum gases around the world on every continent except antarctica. As a phenomenon of nature how does matter behave at very low temperatures. Often, our work is motivated by unresolved problems from condensed matter physics, which we emulate with trapped atomic gases. Ultracold quantum gases in triangular optical lattices iopscience.
Interactions in ultracold gases typical parameters temperature 10 100 nk density 101014 cm. Dipolar quantum gases, ferlaino group ultracold quantum matter, grimm group. Dipolar quantum gases, ferlaino group ultracold quantum matter, grimm group strongly correlated quantum matter, nagerl group. Emphasis is given to the effect of interactions which play a crucial role, bringing the gas into a superfluid phase at low temperature.
They combine the unprecedented control achieved in singlecomponent bose einstein condensates bec with intrinsic degrees of freedom. These gases constitute a model system of interacting fermions, whose physical behaviour is very rich2 4. In more recent years, these systems have attracted a great deal of attention in other areas in physics, such as condensed matter physics, nuclear physics, and. Students and reseachers, who would like to attend the 685th weheraeus seminarresearch frontiers in ultracold quantum gases, should send an informal email to axel. The general focus is on the behaviour of socalled quantum fluids, i. In recent years, technologies have been developed to cool atoms and molecules to the lowest temperatures and to manipulate and control their degrees of freedom at the quantum level.
Since the interactions between the particles of ultracold quantum gases can be varied continuously, new correlations can be introduced, such as spinorbit coupling 2 a way to link the internal quantum state of the. Lindsay j leblanc ultracold quantum gases laboratory. 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. Ultracold atoms have proven to be a powerful platform for studying. Observation of nodalline semimetal with ultracold fermions in an optical lattice. Bose gases, combining a tunable inplane box potential with a strong and. As a quantum physics laboratory due to good experimental control quantum information, bells inequalities, quantum computation.
Welcome to the fascinating world of quantum matter near absolute zero. Rydberg gases and ultracold plasmas are discussed in sections 10 and 11. Our general scientific goal is to create novel states of quantum matter and to investigate their intriguing and sometimes very bizarre properties. Gyuboong jos group at hkust hong kong university of science and technology.
In particular, we are interested in questions related to how strong interactions, reduced dimensionality. Ultracold quantum fields provides a selfcontained introduction to quantum field theory for manyparticle systems, using functional methods throughout. Ultracold quantum gases zixu zhang, phd university of pittsburgh, 2012 in this thesis, we discuss ultracold quantum gases both in continuum and optical lattices. Vincent liu, for his continued guidance and support during my phd study. New quantum simulations with ultracold ytterbium gases. Quantum gases in this section we will discuss situations where quantum e. One possible way to produce ultracold, highphasespacedensity quantum gases of molecules in the rovibronic ground state is given by molecule association from quantumdegenerate atomic gases on a feshbach resonance and subsequent coherent optical multi.
Ultracold atoms and quantum gases research groups of f. Complete internal quantum state control of molecules was achieved in bulk gases and optical lattices815. In particular, we are interested in questions related to how. Very nice model system to test methods of quantum and statistical. Ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems. Our research group at the physikalisches institut of heidelberg university performs fundamental research in the fields of quantum and atomic physics. Apr 12, 2014 ultracold fermi gases ii we explore unconventional ways how ultracold fermions pair and form collective quantum phases exhibiting longrange order, such as superfluidity and magnetically order. Internationaldoctorateinatomic andmolecularphotonics cicloxxx coordinatore prof. Ultracold gases in optical lattices have become a versatile tool with which to simulate a wide range of condensedmatter phenomena 3,4.
Quantum engineering with ultracold atoms technische universiteit. Merging of dirac points in a shaken honeycomb lattice. Researchers will use nasa s cold atom laboratory to study ultracold quantum gases, exploring how atoms interact in microgravity when they have almost no motion due to such cold temperatures. Apr 24, 2014 after varying the magnetic field in each experimental cycle and repeating the experiment 14,000 times, the physicists identified 200 resonances an amount unprecedented in ultracold quantum gases. Publishers pdf, also known as version of record includes final page, issue and volume numbers. We employ ultracold atomic fermi gases to study quantum manybody physics. In particular, we are interested in questions related to how strong interactions, reduced dimensionality 1d and 2d. Ultracold quantum gases science topic explore the latest questions and answers in ultracold quantum gases, and find ultracold quantum gases experts. Quantum gases in box potentials tel archives ouvertes.
The wilhelm and else heraeus seminar research frontiers in ultracold quantum gases, which will bring together about 80 participants in bad honnef germany in december 2018, will provide a comprehensive survey of the different facets of this rapidly evolving subject. These advances have already opened the door to many research directions, including ultracold chemistry16 and simulations of quantum spin models17. Ultracold atoms have a variety of applications owing to their unique quantum properties and the great experimental control available in such systems. Ultracold gases department of physics georgetown university. Mar 14, 2012 ultracold gases in optical lattices have become a versatile tool with which to simulate a wide range of condensedmatter phenomena 3,4. Pdf quantum simulations with ultracold quantum gases.
For instance, ultracold atoms have been proposed as a platform for quantum computation and quantum simulation, 5 accompanied by very active experimental research to achieve these goals. The high degree of controllability, the novel detection possibilities and the extreme. Combining the above relations we obtain for the variance of the energy of the small system. Magnetic merging of ultracold atomic gases of rb arxiv. Exploring quantum criticality based on ultracold atoms in optical lattices x. The research group led by wittgenstein awardee rudolf grimm of the institute for experimental physics of the university of innsbruck assumes a leading role in the research on ultracold quantum gases. The young field of ultracold quantum gases is an exciting, fast. To design and implement a system that incorporates ultracold quantum gases and solid state quantum devices through atom chip technologies. Since the interactions between the particles of ultracold quantum gases can be varied continuously, new correlations can be introduced, such as spinorbit coupling 2 a way to link the internal quantum state of the atom its spin to its external motion its orbit. Ultracold quantum gases laboratory for quantum simulation. Creating, moving and merging dirac points with a fermi gas. Ultracold quantum matter ultracold atoms and quantum gases. Creating, moving and merging dirac points with a fermi gas in.
After varying the magnetic field in each experimental cycle and repeating the experiment 14,000 times, the physicists identified 200 resonances an. Focus issue on quantum simulation and an iop select 2011. Using ultracold ytterbium fermions trapped in engineered optical lattices, we aim to engineer the band structure and its topological nature by which topological. Thomas busch john goold suzanne mcendoo brian osullivan tara hennessy longlived vortex flux qubits in superfluid becs nonclassical light sources in degenerate fermi gases. Techniques to create ultracold atoms are readily available. Ultracold fermi gases we employ ultracold atomic fermi gases to study quantum manybody physics. Ultracold fermi gases ii we explore unconventional ways how ultracold fermions pair and form collective quantum phases exhibiting longrange order, such as superfluidity and magnetically order. Moreover, we strive to realize new quantum phases not encountered in the solid state.
At these temperatures the atoms quantummechanical properties become important to reach such low temperatures, a combination of several techniques typically has to be used. These two valence electrons atoms show electronic spinless ground state and weakly allowed singlettriplet transitions, offering interesting alternatives and opening new fields of research for cold and ultracold gases with respect to. Ultracold fermi gases we first consider quantum simulation of ultracold fermi gases with attractive interactions. Ultracold quantum gases single particle engineering using adiabatic methods submicron fibres in optical lattices for global access quantum computing dr. In case that you would like to present a poster, please send both title and abstract. This this work presents a series of experiments that has been carried out in order to create the molecules in their lowest internal quantum state. Collective oscillations of an ultracold quantum gas in the becbcs crossover regime. Design, synthesize and simulate topological matter with ultracold fermions the driving force of this project is the curiosity and desire to quantum simulate exotic quantum phases beyond the natural conditions in an artificial system. Ultracold quantum gases laboratory for quantum simulation and. Researchers will use nasa s cold atom laboratory to study ultracold quantum gases, exploring how atoms interact in microgravity when they have almost no motion due to such cold temperatures like dancers in a chorus line, atoms movements become synchronized when lowered to extremely cold temperatures. 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. July 31, 2015 congratulations to daniel and bo for successfully defending their master phd theses. Recent advances in spinorbitcoupled quantum gases j.
Pdf ultracold quantum gases in triangular optical lattices. In our experiments, we use ultracold atom clouds to understand how complex quantum systems behave. These two valence electrons atoms show electronic spinless ground state and weakly allowed singlettriplet transitions, offering interesting alternatives and opening new fields of research for cold and ultracold gases with respect to the more commonly used alkaline atoms. These socalled optical lattices act as versatile potential landscapes to trap ultracold quantum gases of bosons and fermions. Leblanc full cv, pdf assistant professor canada research chair in ultracold gases for quantum simulation fellow, canada institute for advanced research quantum materials program lindsay. We are an experimental research group working with atomic and molecular gases cooled down to temperatures in the nanokelvin range. Groundbreaking insights into quantum chaos in ultracold gas.
This explains the increasing importance of ultracold atomic gases as simple models for a better understanding of quantum many body systems purpose of these lectures. Specifically, we plan to realize and study pairing with orbital angular momentum and pairing induced by longrange interaction. Candidates with interest or experience in quantum device fabrication are especially encouraged to apply. To study this bizarre phenomenon, called a boseeinstein condensate, researchers need. Pdf ultracold quantum gases offer a unique setting for quantum. Quantum polarization spectroscopyof ultracold spinor gases k. Engineered potentials and dynamics of ultracold quantum gases. First, atoms are usually trapped and precooled via laser cooling in a. For the physics of ultracold gases it implies that weakly. Ultracold atoms and quantum gases added 29 new photos from july 31, 2015 to the album. Robertorighini new quantum simulations with ultracold ytterbium gases. Introduction the eld of matterwave optics has progressed enormously since the rst observations of boseeinstein condensation in 1995 and now many more atomic elements are candidates for study in the quantum degenerate regime.
Quantum degeneracy in a gas of atoms 1 atom per quantum state number of atoms available position space available momentum space h3 n m k b t32 h3 1 dilute metastable gases n 1014cm3 t c 1mk ultracold air n 1019cm3, t c 1mk stuff n 1022cm3, t c 0. Johannes hecker denschlag description the young field of ultracold quantum gases is an exciting, fast. Magnetic merging of ultracold atomic gases of 85rb and 87rb 2 1. Therefore we create ultracold molecules from already cooled ultracold gases.
One possible way to produce ultracold, highphasespacedensity quantum gases of molecules in the rovibronic ground state is given by molecule association from quantum degenerate atomic gases on a feshbach resonance and subsequent coherent optical multiphoton transfer into the rovibronic ground state. Our research interests include quantum simulation with ultracold atoms, synthetic quantum materials, fermionic and bosonic quantum gases. They became world wide known after the achievement of boseeinstein condensation in 1995 see nobel prize in physics in 2001. Of course no introduction into the quantum gases is complete without a. For the continuum fermi gases in bcsbec crossover, we present an e. Ad fundamental properties why choose ultracold atoms. Quantum polarization spectroscopyof ultracold spinor gases. Ultracold gases are a relatively young field in atomic and molecular physics.
Ultracold quantum gases have opened up new vistas in manybody physics, from novel quantum states of matter to quantum computing applications. Ultracold quantum gases and functional renormalization. There are over one hundred experiments on ultracold quantum gases around the world on every continent but antarctica. Neutral atoms with a large magnetic dipole moment or. Efimov resonances in ultracold quantum gases article pdf available in fewbody systems 5124 november 2011 with 224 reads how we measure reads. Local probing of interacting fermions in optical lattices. In recent years, technologies have been developed to cool atoms and molecules to the lowest temperatures.
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