Today, systems of bosonic or fermionic quantum gases allow for a very high level of experimental control concerning all ingredients of the underlying manybody hamiltonian. April 2004 arrays of ultracold atoms trapped by artificial crystals of light can be used in a wide variety of experiments in quantum physics imagine having an artificial substance in which you can control almost all aspects of the underlying periodic structure. As almost all thermal energy is removed from the atomic cloud, the dynamics are determined by external potentials and the interaction between atoms. Dynamics of quenched ultracold quantum gases jila colorado. The unprecedented experimental sophistication reached recently in ultracold atomic gases has opened new and exciting perspectives in. A tomic, molecular, and optical physics experiments enable the precise control of interactions in a quantum manybody system1,2. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is. Ultracold quantum gases in threedimensional optical lattice potentials. Specifically, we plan to realize and study pairing with orbital angular momentum and pairing induced by longrange interaction. Quantum simulation with ultracold atomic gases in an optical lattice. Dipolar quantum gases, ferlaino group ultracold quantum matter, grimm group. To a good approximation, samples are thermally isolated from the environment and thus represent idealized quantum. Ultracold atoms and quantum gases research groups of f.
In this dissertation, we study rotational properties of ultracold bosonic quantum gases in two trapped configurations, a quasitwodimensional gas in a harmonic trap and a. Ultracold quantum gases in triangular optical lattices. Ultracold gases are a relatively young field in atomic and molecular physics. 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. Spinorbit coupling and supersolidity in ultracold quantum gases. First, atoms are usually trapped and precooled via laser cooling in a.
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. Quantum phase transition from a superfluid to a mott insulator in gas of ultracold atoms. Our general scientific goal is to create novel states of quantum matter and to investigate their intriguing and sometimes very bizarre properties. Pdf quantum simulations with ultracold quantum gases. 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. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. The general focus is on the behaviour of socalled quantum fluids, i. Ultracold quantum gases have opened up new vistas in manybody physics, from novel quantum states of matter to quantum computing applications. Pdf ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems. To reach such low temperatures, a combination of several techniques typically has to be used. 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. We demonstrate this effect for the example of ultracold quantum gases with dipolar interactions. Introductory course on ultracold quantum gases innsbruck, 0911 july 20.
A complete account of our experimental setup would be a thesis in itself so the chapter vii. To a good approximation, samples are thermally isolated from the environment and thus represent idealized quantum systems. Feshbach resonances in ultracold mixtures of fermionic quantum gases tobias tiecke 2009 feshbach resonances in ultracold mixtures of the fermionic quantum gases 6 li and k40 tobias tiecke dinsdag 15 december om 16. This website uses cookies to improve your experience while you navigate through the website. Ultracold atoms and quantum gases added 29 new photos from july 31, 2015 to the album. Maniscalco1,2 1turku center for quantum physics, department of physics and astronomy, university of turku, fin20014, turku, finland. In our experiments, we use ultracold atom clouds to understand how complex quantum systems behave. In the context of magnetic interaction in ultracold quantum gases, spin mixtures are currently receiving rapidly growing experimental and theoretical interest. Rudolf grimm is part of the center for ultracold atoms and quantum gases. Properties of rotating ultracold bosonic quantum gases. In this dissertation, we study rotational properties of ultracold bosonic quantum gases in two trapped configurations, a quasitwodimensional gas in a harmonic trap and a quasionedimensional gas in a toroidal trap. At the centre for quantum technologies cqt and the national university of singapore we have an opening for a. First direct observation of exchange process in quantum gas.
A major contribution to the way we describe ultracold quantum gases. Spectroscopy of an interacting ultracold rydberg gas. In particular, we are interested in questions related to how. Competition between weak quantum measurement and manybody dynamics in ultracold bosonic gases abstract. Competition between weak quantum measurement and many. Novel quantum states of matter have been successfully achieved for the first time by using ultracold ytterbium atoms in optical lattices. Collective oscillations of an ultracold quantum gas in the becbcs crossover regime. Johannes hecker denschlag description the young field of ultracold quantum gases is an exciting, fast. This can come from many different areas of physics, such as quantum physics, quantum information, solid. After the introduction, the work presented in this thesis can be divided into three major parts. They became world wide known after the achievement of boseeinstein condensation in 1995 see nobel prize in physics in 2001. There are over 100 experiments on ultracold quantum gases around the world on every continent except antarctica. Introduction the physics of quantum degenerate gases in optical lattices has rapidly grown to one of the most accounted.
Groundbreaking insights into quantum chaos in ultracold gas. Our recent work finally demonstrated the production of a quantum degenerate molecular gas in an optical lattice42. The young field of ultracold quantum gases is an exciting, fast. Manybody quantum physics with ultracold gases theory quantum dynamics group prof. 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. Ultracold atoms and quantum gases subhadeep gupta uw nsfint phys reu, 26th june 2017 recent control of atomic position and momentum. Molecules comprised of two fermions or two bosons are bosonic. Realizing an ultracold gas of polar molecules has been challenging, in a large part because of the same complex internal state structure that makes them interesting. 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.
Total current blockade in an ultracold dipolar quantum. To design and implement a system that incorporates ultracold quantum gases and solid state quantum devices through atom chip technologies. July 31, 2015 congratulations to daniel and bo for successfully defending their master phd theses. David jacobs master student, university of hamburg 20182019 now taking a gap year and travelling around the world email. Manybody quantum physics with ultracold gases theory. Ultracold quantum fields theoretical and mathematical. Uitnodiging feshbach resonances in ultracold mixtures of. Functional renormalization and ultracold quantum gases stefan. Published version in the focus issue on quantum thermodynamics.
Daniels and bos thesis defense at technik uni innsbruck. If you have a disability and are having trouble accessing information on this website or need materials in an alternate format, contact web. 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. Ultracold atoms are atoms that are maintained at temperatures close to 0 kelvin absolute zero, typically below several tens of microkelvin k. They form powerful model systems of quantum manybody systems in periodic potentials for probing nonlinear wave dynamics and strongly correlated quantum phases, building fundamental quantum gates or observing fermi surfaces in periodic potentials. Ultracold quantum gases science topic explore the latest questions and answers in ultracold quantum gases, and find ultracold quantum gases experts. Total current blockade in an ultracold dipolar quantum wire. The exquisite control necessary to realize boseeinstein condensation in the laboratory paved the way for a wealth of other studies of quantum phenomena. The system and the questions ultracold quantum gases are exceptionally powerful systems for creating and studying interesting and novel quantum manybody systems. For more information visit the web pages of the individual groups. Ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems. Typical experiments use magnetic or optical forces to trap a dilute vapor of atoms in high vacuum. Candidates with interest or experience in quantum device fabrication are especially encouraged to apply. In this respect ultracold rydberg gases exhibit an interesting contrast.
Introductory course on ultracold quantum gases program. Ultracold quantum gases provide a clean, isolated, and controllable platform. As a quantum physics laboratory due to good experimental control quantum information, bells inequalities, quantum computation. Coherence and decoherence in ultracold rydberg gases.
The center is formed by three groups at the university of innsbruck and the austrian academy of sciences. Quantum corrections to the classical field approximation for 1d quantum manybody systems in equilibrium. Ultracold gases department of physics georgetown university. Daniel allepuz bachelor student, physics, ub 2019 summer student summer 2018. At these temperatures the atoms quantummechanical properties become important. After varying the magnetic field in each experimental cycle and repeating the experiment 14,000 times, the physicists identified 200 resonances an. The open access journal for physics new jou rnal of ph ys ics ultracold quantum gases in triangular optical lattices c becker1,3, p soltanpanahi1, j kronjager2, s dorscher1, k bongs2 and k sengstock1 1 institut fur laserphysik, universitat hamburg, hamburg d22761, germany 2 muarc, school of physics and astronomy, university of birmingham, edgbaston, birmingham b15 2tt, uk. As a phenomenon of nature how does matter behave at very low temperatures. Ultracold quantum gases in triangular optical lattices 2 1. Trapping ultracold atoms in optical lattices enabled the study of strongly correlated phenomena in an environment that is far more controllable and tunable than what was possible in condensed matter.
In recent years, technologies have been developed to cool atoms and molecules to the lowest temperatures. Since the first experimental realization of boseeinstein condensation in ultracold atomic gases in 1995, there have been several substantial breakthroughs. It is also the plan to put this mixture into an optical lattice henrik is currently. The high degree of controllability, the novel detection possibilities and the extreme physical parameter regimes that can be reached in these. Phd candidacy on ultracold polar molecules in optical lattices.
Gyuboong jos group at hkust hong kong university of science and technology. The electronic coulomb blockade in mesoscopic quantum dots has been an intensive research topic the last two decades. Our research group at the physikalisches institut of heidelberg university performs fundamental research in the fields of quantum and atomic physics. In recent years, ultracold atomic gases have become a fertile ground for developing and testing ideas of quantum manybody physics. This new experimental environment opens the way to study manybody physics from so. Well still restrict attention to gases meaning a bunch of particles moving around and barely interacting but one of the. Lindsay j leblanc ultracold quantum gases laboratory. Ultracold quantum matter ultracold atoms and quantum gases. The search for novel phases of quantum coherent matter has been one of the main driving forces in condensed matter physics for many years. Phd candidacy on ultracold polar molecules in optical lattices centre for quantum technologies, national university of singapore project description are you looking for an experimental phd project in the area of ultracold quantum gases. Maniscalco1,2 1turku center for quantum physics, department of physics and astronomy, university of turku, fin20014, turku, finland 2supa, epsphysics, heriotwatt university, edinburgh, eh14 4as, united kingdom received 28 december 2012. Remove degrees of freedom manipulate controllablyusefully introduce complexity address qs in amo, cm, nuclear, particle today. They are systems that are translationally cold, but comprise enormous internal energy. Ultracold atomic gases mixtures and molecules jesper fevre bertelsen danish national research foundation center for quantum optics quantop department of physics and astronomy university of aarhus phd thesis august 2007.
Quantum gases in this section we will discuss situations where quantum e. 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. Quantum simulations with ultracold quantum gases immanuel bloch 1,2, jean dalibard 3 and sylvain nascimbene 1,3 ultracold quantum gases offer a unique setting for quantum simulation of. Ultracold quantum gases have opened the door to a wide range of research activities using a large degree of control over the internal and external degrees of freedom chu et al.
Our research interests include quantum simulation with ultracold atoms, synthetic quantum materials, fermionic and bosonic quantum gases. Research laboratory for ultracold quantum gases hkust. Precision bec interferometry bosefermi superfluids 250mm about 105 yb atoms. Competition between weak quantum measurement and manybody. At these temperatures the atoms quantummechanical properties become important to reach such low temperatures, a combination of several techniques typically has to be used.
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