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. Collisional dynamics of ultracold atomic gases ens. 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. We first consider quantum simulation of ultracold fermi gases. These clusters might thus serve as qubits, the basic building blocks of quantum computers.
Ultracold atoms and quantum gases research groups of f. May 07, 20 abelian and nonabelian gauge theories are of central importance in many areas of physics. Functional renormalization and ultracold quantum gases stefan. 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. From atom optics to quantum simulation interacting bosons and. 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. 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. Lindsay j leblanc ultracold quantum gases laboratory. This thesis explores ultracold quantum gases of bosonic and fermionic atoms. 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. Well still restrict attention to gases meaning a bunch of particles moving around and barely interacting but one of the. Ultracold gases are a relatively young field in atomic and molecular physics. From ultracold quantum gases to quantum chromodynamic plasmas.
A major contribution to the way we describe ultracold quantum gases. 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. Dipolar quantum gases, ferlaino group ultracold quantum matter, grimm group strongly correlated quantum matter, nagerl group. Ultracold quantum gases, quantum chromodynamic plasmas, and holographic duality. Vincent liu, for his continued guidance and support during my phd study. Quantum simulation of the hubbard model with ultracold fermions in. In recent years, technologies have been developed to cool atoms and molecules to the lowest temperatures. Probing and manipulating fermionic and bosonic quantum gases with.
Pdf probing and manipulating fermionic and bosonic quantum. The young field of ultracold quantum gases is an exciting, fast. Ultracold atoms have a variety of applications owing to their unique quantum properties and the great experimental control available in such systems. 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. 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. We recover here the statement that often appears in quantum. View table of contents for interactions in ultracold gases. For more information visit the web pages of the individual groups. The physics of quantum degenerate gases in optical lattices has rapidly grown to one. 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.
Since the first realization of a degenerate gas of ultracold fermionic atoms in 1999 7. Our research group at the physikalisches institut of heidelberg university performs fundamental research in the fields of quantum and atomic physics. As a quantum physics laboratory due to good experimental control quantum information, bells inequalities, quantum computation. 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. 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. 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. Photodissociation of ultracold diatomic strontium molecules. Opening laboratory for ultracold quantum gases hkust. Ultracold molecules hold promise for quantum computing mit news. 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. As a highly controllable and disorder free system, ultracold atomic gases provide a versatile. In quantum information theory, kitaevs toric code is a z2 lattice gauge theory. Ultracold quantum gases in triangular optical lattices.
In condensed matter physics, abelian u1 lattice gauge theories arise in the description of certain quantum spin liquids. Quantum gases in this section we will discuss situations where quantum e. 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. In particular, we are interested in questions related to how. Describes methods used to address various problems in the field of ultracold atomic gases which are not presently available in any other title. Nasas cold atom laboratory to study ultracold quantum gases.
As a phenomenon of nature how does matter behave at very low temperatures. Conditional manybody dynamics and quantum control of ultracold fermions and. 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. Quantum simulations with ultracold quantum gases nature. 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. The high degree of controllability, the novel detection possibilities and the extreme. Pdf quantum simulations with ultracold quantum gases. Pdf ultracold quantum gases in triangular optical lattices. Quantum simulation of ultrafast dynamics using trapped. 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. Ultracold atoms and quantum gases added 29 new photos from july 31, 2015 to the album.
Emphasis is given to the effect of interactions which play a crucial role, bringing the gas into a superfluid phase at low temperature. Often, our work is motivated by unresolved problems from condensed matter physics, which we emulate with trapped atomic gases. Realizing and probing driven quantum systems with ultracold gases. The presentation is accessible to the general physics reader and includes discussions of the latest research developments in all three areas. 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. During this period, e commerce and registration of new users may not be available for up to 12 hours.
Physics on ultracold quantum gases peking universityworld. Heteronuclear efimov resonances in ultracold quantum gases. 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. Dynamics of ultracold quantum gases in the dissipative fermi. Immanuel bloch at max planck institute of quantum optics. We employ ultracold atomic fermi gases to study quantum manybody physics. Our research interests include quantum simulation with ultracold atoms, synthetic quantum materials, fermionic and bosonic quantum gases. 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. We employ metastable ultracold 173yb atoms to study dynamics in the 1d dissipative fermihubbard model. Ultracold quantum gases offer a versatile platform to study a wide range of open questions in condensed matter physics and beyond. 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. Owing to the lowtemperatures and optical pumping techniques, complete control over both.
Liu has always educated me very patiently with his deep and broad knowledge in physics. Moreover, we strive to realize new quantum phases not encountered in the solid state. These socalled optical lattices act as versatile potential landscapes to trap ultracold quantum gases of bosons and fermions. Interactions in ultracold gases wiley online books. 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. Degenerate quantum gases of strontium simon stellmer. Topological gapless matters in threedimensional ultracold. Pdf ultracold quantum gases in optical lattices researchgate. During this period, ecommerce and registration of new users may not be available for up to 12 hours. A quantum computer with even 50 qubits would allow quantum simulations that are out of the reach of classical computers. 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. Local probing of interacting fermions in optical lattices. Quantum simulations with ultracold quantum gases nature physics. Quantum simulations with ultracold quantum gases article pdf available in nature physics 84.
July 31, 2015 congratulations to daniel and bo for successfully defending their master phd theses. 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. 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. Over the last years the exciting developments in the field of ultracold atoms confined in optical lattices have led to numerous theoretical proposals devoted. A thouless quantum pump with ultracold bosonic atoms in an. Emphasis is given to the effect of interactions which play a crucial. In the last twenty years, ultracold quantum gases have emerged as a flexible platform.
Pdf measuring work and heat in ultracold quantum gases. Journal of physics on strongly correlated quantum fluids. Ultracold molecules hold promise for quantum computing. In our experiments, we use ultracold atom clouds to understand how complex quantum systems behave. Scientists will use the facility to explore how differently atoms interact in microgravity when they have almost no motion due to such cold temperatures.
Ultracold gases department of physics georgetown university. 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. 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. Pdf ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems. On the one hand, they can be viewed as experimental quantum simulators for exploring challenging problems of condensedmatter physics such as. Experiments with gases of ultracold atoms are building on a long history of precision. They became world wide known after the achievement of boseeinstein condensation in 1995 see nobel prize in physics in 2001. Ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems.