Researchers have taken an important step toward the longsought goal of a quantum computer, which in theory should be capable of vastly faster computations than conventional computers, for. Often, our work is motivated by unresolved problems from condensed matter physics, which we emulate with trapped atomic gases. The ultracold quantum gas laboratory at hkust invites applicants for a graduate research position and a postdoctoral position in experimental atomic molecular optical amo physics. Johannes hecker denschlag description the young field of ultracold quantum gases is an exciting, fast. Threedimensional topological gapless matters with gapless degeneracies protected by a topological invariant defined over a closed manifold in momentum space have attracted considerable interest in various fields ranging from condensed matter materials to ultracold atomic gases. Ultracold atomic gases provide an excellent platform to engineer the models underlying these phenomena, allowing us to study manybody quantum systems in a clean and very well controlled environment. 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. Photodissociation of ultracold diatomic strontium molecules. Physics on ultracold quantum gases peking universityworld. 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. We employ metastable ultracold 173yb atoms to study dynamics in the 1d dissipative fermihubbard model.
They became world wide known after the achievement of boseeinstein condensation in 1995 see nobel prize in physics in 2001. Our research group at the physikalisches institut of heidelberg university performs fundamental research in the fields of quantum and atomic physics. Ultracold atoms and quantum gases added 29 new photos from july 31, 2015 to the album. Degenerate quantum gases of strontium simon stellmer. Ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems.
Ultracold gases are a relatively young field in atomic and molecular physics. May 07, 20 abelian and nonabelian gauge theories are of central importance in many areas of physics. Jul 27, 2017 researchers have taken an important step toward the longsought goal of a quantum computer, which in theory should be capable of vastly faster computations than conventional computers, for certain. We employ ultracold atomic fermi gases to study quantum manybody physics. Specifically, we plan to realize and study pairing with orbital angular momentum and pairing induced by longrange interaction. Download fulltext pdf download fulltext pdf download fulltext pdf measuring work and heat in ultracold quantum gases article pdf available in new journal of physics 173 december 2014. Probing and manipulating fermionic and bosonic quantum gases with. The physics of quantum degenerate gases in optical lattices has rapidly grown to one. We recover here the statement that often appears in quantum.
Emphasis is given to the effect of interactions which play a crucial. Collisional dynamics of ultracold atomic gases ens. On the one hand, they can be viewed as experimental quantum simulators for exploring challenging problems of condensedmatter physics such as. Ultracold gases department of physics georgetown university. Our group mainly focuses on the study of quantum dynamics in synthetic quantum matter made by ultracold fermionsbosons using various tools in experimental atomic. Ultracold quantum gases in triangular optical lattices.
Ultracold molecules hold promise for quantum computing mit news. In a typical ultracold gas experiment, a small sample of atoms is cooled down by standard laser cooling techniques 94,105, and confined in an optical dipole trap. Experiments with gases of ultracold atoms are building on a long history of precision. Over the last years the exciting developments in the field of ultracold atoms confined in optical lattices have led to numerous theoretical proposals devoted. The topics range from bose einstein condensates to degenerate fermi gases to fundamental concepts in quantum information sciences, including some special topics on quantum hall effects, quantum phase transition, interactions in quantum fluids, disorder and interference phenomenoma, trapped ions and atoms, and quantum optical devices. Ultracold molecules hold promise for quantum computing. View table of contents for interactions in ultracold gases. Liu has always educated me very patiently with his deep and broad knowledge in physics.
In our experiments, we use ultracold atom clouds to understand how complex quantum systems behave. The young field of ultracold quantum gases is an exciting, fast. Local probing of interacting fermions in optical lattices. 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. The photodissociation of 88sr2 molecules is examined at ultracold temperatures with a high degree of control, and a wealth of quantum effects such as barrier tunnelling, matterwave interference. Describes methods used to address various problems in the field of ultracold atomic gases which are not presently available in any other title. Opening laboratory for ultracold quantum gases hkust. This thesis explores ultracold quantum gases of bosonic and fermionic atoms. We first consider quantum simulation of ultracold fermi gases. Ultracold quantum gases, quantum chromodynamic plasmas, and holographic duality. In particle physics, quantum chromodynamics qcd, the nonabelian su3 gauge theory of the strong. Gyuboong jos group at hkust hong kong university of science and technology. In condensed matter physics, abelian u1 lattice gauge theories arise in the description of certain quantum spin liquids. Ultracold atoms have a variety of applications owing to their unique quantum properties and the great experimental control available in such systems.
Lindsay j leblanc ultracold quantum gases laboratory. More than 30 years ago, thouless introduced the concept of a topological charge pump that would enable the robust transport of charge through an adiabatic cyclic evolution of the underlying hamiltonian. In particular, their controllability, isolation from noisy thermal environments, and evolution on experimentallyaccessible timescales make them a natural choice to probe the effects of driving on time evolution and energy. Nasas cold atom laboratory to study ultracold quantum gases. Scientists will use the facility to explore how differently atoms interact in microgravity when they have almost no motion due to such cold temperatures. Jul 27, 2017 a study by mit researchers shows that collections of ultracold molecules can retain the information stored in them for hundreds of times longer than previously achieved in these materials. Pdf ultracold quantum gases in optical lattices researchgate. In recent years, technologies have been developed to cool atoms and molecules to the lowest temperatures. 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. July 31, 2015 congratulations to daniel and bo for successfully defending their master phd theses. For more information visit the web pages of the individual groups.
These socalled optical lattices act as versatile potential landscapes to trap ultracold quantum gases of bosons and fermions. Quantum gases in this section we will discuss situations where quantum e. In quantum information theory, kitaevs toric code is a z2 lattice gauge theory. Quantum optics with quantum gases closes this gap and addresses phenomena, where the quantum statistical nature of both light and ultracold matter play equally important roles. Owing to the lowtemperatures and optical pumping techniques, complete control over both. Vincent liu, for his continued guidance and support during my phd study. Pdf ultracold quantum gases in triangular optical lattices. The goal of nasas cold atom laboratory cal is to study ultracold quantum gases in a facility instrument developed for use on the international space station. Pdf quantum simulations with ultracold quantum gases.
Quantum simulations with ultracold quantum gases nature. Our research interests include quantum simulation with ultracold atoms, synthetic quantum materials, fermionic and bosonic quantum gases. During this period, e commerce and registration of new users may not be available for up to 12 hours. Since the first realization of a degenerate gas of ultracold fermionic atoms in 1999 7. Though very little of the growing body of quantum simulation work has addressed ultrafast phenomena, a robust toolkit exists for controlling and measuring excitations in trapped gases. Quantum simulation of ultrafast dynamics using trapped. Pdf ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems. As a phenomenon of nature how does matter behave at very low temperatures.
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. In particular, we are interested in questions related to how. 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. Pdf probing and manipulating fermionic and bosonic quantum. The high degree of controllability, the novel detection possibilities and the extreme. Immanuel bloch at max planck institute of quantum optics. Quantum simulations with ultracold quantum gases article pdf available in nature physics 84.
Ultracold quantum gases offer a versatile platform to study a wide range of open questions in condensed matter physics and beyond. 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. Realizing and probing driven quantum systems with ultracold gases. Ultracold atoms and quantum gases research groups of f. Interactions in ultracold gases wiley online books. From ultracold quantum gases to quantum chromodynamic plasmas. Well still restrict attention to gases meaning a bunch of particles moving around and barely interacting but one of the. A major contribution to the way we describe ultracold quantum gases. 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. Functional renormalization and ultracold quantum gases stefan. As a highly controllable and disorder free system, ultracold atomic gases provide a versatile. Heteronuclear efimov resonances in ultracold quantum gases.
Dipolar quantum gases, ferlaino group ultracold quantum matter, grimm group strongly correlated quantum matter, nagerl group. Pdf measuring work and heat in ultracold quantum gases. In contrast to classical transport, the transported charge was shown to be quantized and purely determined by the topology of the pump cycle, making it robust to. 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. In the last twenty years, ultracold quantum gases have emerged as a flexible platform. During this period, ecommerce and registration of new users may not be available for up to 12 hours. These clusters might thus serve as qubits, the basic building blocks of quantum computers. Emphasis is given to the effect of interactions which play a crucial role, bringing the gas into a superfluid phase at low temperature. 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 presentation is accessible to the general physics reader and includes discussions of the latest research developments in all three areas. Controlling ultracold gases on the quantum level author.
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