Quantum simulations with ultracold quantum gases pdf files

There are over one hundred experiments on ultracold quantum gases around the world on every continent but antarctica. The quantum world blatantly defies intuitions that weve developed while living among relatively large things, like cars, pennies and dust motes. Researchers have created a new type of ultracold molecule, using lasers to cool atoms nearly to absolute zero and then gluing them together, a technology that might be applied to quantum computing, precise sensors and advanced simulations. Large scale quantum simulations using ultracold atomic gases in optical lattices mo. Our general scientific goal is to create novel states of quantum matter and to investigate their intriguing and sometimes very bizarre properties. Quantum simulations with ultracold atoms in optical. Our research group at the physikalisches institut of heidelberg university performs fundamental research in the fields of quantum and atomic physics. Quantum gases and ultracold atoms quantum technology. Detection of correlations in optical lattices we proposed a setup for detecting quantum correlations in strongly correlated states in optical lattices. In contrast to the traditional works, it will address the phenomena, where the quantum nature of light and ultracold gases is equally important. Detection of correlations in optical lattices we proposed a setup for detecting quantum correlations. Quantum gases in this section we will discuss situations where quantum e. The chosen examples, some of which have already been realized in experiment, include such diverse settings as frustrated antiferromagnetism, quantum phase transitions in exotic lattice geometries, topological insulators, nonabelian gaugefields, orbital order of ultracold fermions, and systems with longrange interactions. Sep 18, 20 physicists at jila have created a crystallike arrangement of ultracold gas molecules that can swap quantum spin properties with nearby and distant partners.

Quantum simulation with ultracold quantum gases, trapped ions. Johannes hecker denschlag description the young field of ultracold quantum gases is an exciting, fast. Murray holland ultracold bose gases present an ideal environment for the study of manybody physics. Ultracold molecular gases offer a wide range of research opportunities, extending from quantum simulation of manybody systems with longrange dipolar interactions 12 3 to external field. Internationaldoctorateinatomic andmolecularphotonics cicloxxx coordinatore prof. May 07, 20 quantum link models extend the concept of lattice gauge theories beyond the wilson formulation, and are well suited for both digital and analog quantum simulation using ultracold atomic gases in optical lattices. 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. The high degree of controllability, the novel detection possibilities and the extreme. As a phenomenon of nature how does matter behave at very low temperatures. Quantum link models extend the concept of lattice gauge theories beyond the wilson formulation, and are well suited for both digital and analog quantum simulation using ultracold atomic gases in optical lattices. These systems can be prepared under various experimental conditions with precise control. Welcome to the fascinating world of quantum matter near absolute zero. Ultracold quantum gases offer a unique setting for quantum simulation of interacting manybody systems.

Ultracold quantum gases have opened up new vistas in manybody physics, from novel quantum states of matter to quantum computing applications. The novel structure might be used to simulate or even invent new materials that derive exotic properties from quantum spin behavior, for electronics or other practical applications. Highlights include the pioneering of quantum gas microscopy, the realization of. Ultracold quantum gases in triangular optical lattices. By following the dynamics of a quantum system of strongly correlated ultracold atoms in an optical lattice, a team of physicists has demonstrated the superiority of a dynamical quantum simulator over stateoftheart numerical calculations. Quantum simulations with ultracold quantum gases nature physics. Quantum physics with ultracold atoms in optical lattices. The quantum behavior of dynamical localization bucks the assumption that a cold object will always steal heat from a warmer.

Quantum simulation, a subdiscipline of quantum computation, can provide valuable insight into difficult quantum problems in physics or chemistry. The phenomenon of feshbach resonance provides a means to tune the strength of interactions between atoms over several orders of. Large scale quantum simulations using ultracold atomic. In the first part of the thesis we develop a general method applicable to atoms or molecules or even nanoparticles, to decelerate a hot fast gas beam to zero velocity by using an optical cavity. Many outstanding problems in quantum physics, such as hightc superconductivity or quark confinement, are still after decades of research awaiting commonly accepted explanations. Quantum simulations of condensed matter systems using. We are an experimental research group working with atomic and molecular gases cooled down to temperatures in the nanokelvin range. These socalled optical lattices act as versatile potential landscapes to trap ultracold quantum gases of bosons and fermions. Magnetic lattices for ultracold atoms and degenerate quantum. New frontiers with quantum gases of polar molecules request pdf.

Tureci1 and jens koch2 using a wellcontrolled quantum system to simulate complex quantum matter is an idea that has been around for 30 years and put into practice in systems of ultracold atoms for more than a decade. Ultracold bose gases from the grosspitaevskii to the. Quantum optics with quantum gases university of oxford. These properties put these systems in an ideal position for simulating problems that are out of reach for classical computers. H34 a quantum simulator for carrying out complex physics calculations. We are extending our tool set to optical lattices where we intend to perform quantum simulations of. Quantum simulations with ultracold quantum gases nature. Quantum gases and ultracold atoms quantum technology group. Applications include quantum simulations of condensed matter phenomena 6, trapping of atom arrays in high precision atomic clocks 7 and quantum gas microscopes 8, and the realisation of quantum gates for quantum informa.

In particular, we are interested in questions related to how strong interactions, reduced. The project involves understanding the quantum physics of flat bands, and how ultracold quantum gas setups work. Quantum simulators are devices that actively use quantum effects to answer questions about model systems and, through them, real systems. Strongly correlated fermi gases participation for activity ultracold atoms smr number. Large scale quantum simulations using ultracold atomic gases. There are over 100 experiments on ultracold quantum gases around the world on every continent except antarctica. These gases constitute a model system of interacting fermions, whose physical behaviour is very rich2 4. 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. In brief, boseeinstein condensates bec and degenerate fermi gases of lasercooled alkali atoms are subjected to specially designed optical and magnetic. We study gases of cold and ultracold atoms, their physics and features for the sake of quantum technology. Quantum simulations using ultracold atoms request pdf. Metastability and coherence of repulsive polarons in a strongly interacting fermi mixture, c. Mar 12, 2014 a team of university of innsbruck researchers discovered that even simple systems, such as neutral atoms, can possess chaotic behavior, which can be revealed using the tools of quantum mechanics.

Quantum simulation with stronglyinteracting atoms ytterbium quantum gases superfluidmott transition in bosehubbard gas probe of excitations with inelastic scattering of light twoelectron structure 174experimental realization of bec yb and fermi gases 173yb quantum information and novel quantum simulations. Review quantum simulations with ultracold atoms in optical. 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. New quantum simulations with ultracold ytterbium gases.

Physicists create crystal of spinswapping ultracold molecules sep 18, 20 physicists find charge separation in a molecule consisting of two identical atoms. The main part of the simulations will be done with the kwant software that is tailored to describe quantum. The key prospect of a quantum simulator is to access ne. Specifically, we plan to realize and study pairing with orbital angular momentum and pairing induced by longrange interaction. Lindsay j leblanc ultracold quantum gases laboratory. This thesis explores feynmans idea of quantum simulations by using ultracold quantum gases. Quantum simulation with ultracold atoms conclusion. Since quantum simulators do not suffer from the notorious sign problem, they open the door to studies of the realtime evolution of. Ultracold molecules promising for quantum computing, simulation. As a quantum physics laboratory due to good experimental control quantum information, bells inequalities, quantum computation.

Onchip quantum simulation with superconducting circuits. Quantum optics with quantum gases will close the gap between standard quantum optics and quantum atom optics. Today, his dream has become a reality in laboratories around the world. In condensed matter physics, abelian u1 lattice gauge theories arise in the description of certain quantum spin liquids. Ultracold atoms as quantum simulators scitechdaily. In our experiments, we use ultracold atom clouds to understand how complex quantum systems behave. The high degree of controllability, the novel detection possibilities and the extreme physical parameter regimes that can be reached in these artificial solids provide an exciting complementary setup compared with natural. In recent years, technologies have been developed to cool atoms and molecules to the lowest temperatures. The open access journal for physics new journal of physics cold and ultracold molecules. Pdf quantum simulations with ultracold quantum gases.

Magnetic lattices for ultracold atoms and degenerate. Quantum simulation with ultracold quantum gases, trapped. Quantum simulations with ultracold atoms in optical lattices christian gross1 and immanuel bloch1,2 quantum simulation, a subdiscipline of quantum computation, can provide valuable insight into difficult quantum problems in physics or chemistry. Ultracold bose gases from the grosspitaevskii to the fractional quantum hall regime thesis directed by prof. New frontiers with quantum gases of polar molecules. Ultracold molecules promising for quantum computing.

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. Physicists create crystal of spinswapping ultracold molecules sep 18, 20 physicists find charge separation in. Diffusion monte carlo simulation of quantum gases and solids. Ultracold atoms provide such a window of opportunity designer models achieved through tuning interaction strength, dynamic control, and new experimental probes emulation of simple models relies on a separation of length or energy scales. Ultracold molecules promising for quantum computing, simulation march 12, 2014 west lafayette, ind. Abelian and nonabelian gauge theories are of central importance in many areas of physics. 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 email. In the last years these systems have emerged as an ideal playground for the simulation of manybody quantum phenomena thanks. Workshop on quantum simulations with ultracold atoms. Robertorighini new quantum simulations with ultracold ytterbium gases. A team of university of innsbruck researchers discovered that even simple systems, such as neutral atoms, can possess chaotic behavior, which can be revealed using the tools of quantum mechanics. It has lead to a number of major experimental and theoretical breakthroughs in many research groups. 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 quantum matter ultracold atoms and quantum gases.

The muri program quantum simulations of condensed matter systems using ultra cold atomic gases has had tremendous impact on the field of quantum simulations. Ultracold fermi gases we first consider quantum simulation of ultracold fermi gases with attractive interactions. 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. Ultracold atoms in optical lattices represent an ideal platform for simulations of quantum many.

One reason is that such systems are often difficult to control, show an intermingling of several effects, or are not easily accessible to measurement. Onchip quantum simulation with superconducting circuits andrew a. Ultracold quantum gases laboratory for quantum simulation. Manybody quantum physics with ultracold gases theory. Ultracold quantum mixtures statics and dynamics of impurities in fermi gases future directions. Ultracold quantum gases laboratory for quantum simulation and. Well still restrict attention to gases meaning a bunch of particles moving around and barely interacting but one of the. Ultracold atoms in optical lattices represent an ideal platform for simulations of quantum manybody problems. So, the quantum optics with quantum gases can be considered as an ultimate quantum limit of. Physicists at jila have created a crystallike arrangement of ultracold gas molecules that can swap quantum spin properties with nearby and distant partners. The main part of the simulations will be done with the kwant software that is tailored to describe quantum transport in arbitrary geometry. Experiments with ultracold quantum gases provide a platform for creating manybody systems that can be well controlled and whose parameters can be tuned over a wide range.