Markus Greiner
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View article: Pseudogap in a Fermi-Hubbard quantum simulator
Pseudogap in a Fermi-Hubbard quantum simulator Open
Understanding doped Mott insulators is a fundamental goal in condensed matter physics, with relevance to cuprate superconductors and other quantum materials. The doped Hubbard model minimally describes such systems, and has explicated some…
View article: Exploring confinement transitions in $\mathbb{Z}_2$ lattice gauge theories with dipolar atoms beyond one dimension
Exploring confinement transitions in $\mathbb{Z}_2$ lattice gauge theories with dipolar atoms beyond one dimension Open
Confinement of particles into bound states is a phenomenon spanning from high-energy to condensed matter physics, which can be studied in the framework of lattice gauge theories (LGTs). Achieving a comprehensive understanding of confinemen…
View article: Spin Squeezing with Itinerant Magnetic Dipoles
Spin Squeezing with Itinerant Magnetic Dipoles Open
Entanglement can improve the measurement precision of quantum sensors beyond the shot noise limit. Neutral atoms, the basis of some of the most precise and accurate optical clocks and interferometers, do not naturally exhibit the all-to-al…
View article: Mega-FPS low light camera
Mega-FPS low light camera Open
From biology and astronomy to quantum optics, there is a critical need for high frame rate, high quantum efficiency imaging. In practice, most cameras only satisfy one of these requirements. Here, we introduce interlaced fast kinetics imag…
View article: Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms Open
For a system at a temperature of absolute zero, all thermal fluctuations are frozen out, while quantum fluctuations prevail. These microscopic quantum fluctuations can induce a macroscopic phase transition in the ground state of a many-bod…
View article: Architectural mechanisms of a universal fault-tolerant quantum computer
Architectural mechanisms of a universal fault-tolerant quantum computer Open
Quantum error correction (QEC) is believed to be essential for the realization of large-scale quantum computers. However, due to the complexity of operating on the encoded `logical' qubits, understanding the physical principles for buildin…
View article: Optimized Gutzwiller Projected States for Doped Antiferromagnets in Fermi-Hubbard Simulators
Optimized Gutzwiller Projected States for Doped Antiferromagnets in Fermi-Hubbard Simulators Open
In quantum many-body physics, one aims to understand emergent phenomena and effects of strong interactions, ideally by developing a simple theoretical picture. Recently, progress in quantum simulators has enabled the measurement of site re…
View article: A neutral-atom Hubbard quantum simulator in the cryogenic regime
A neutral-atom Hubbard quantum simulator in the cryogenic regime Open
Ultracold fermionic atoms in optical lattices offer pristine realizations of Hubbard models1, which are fundamental to modern condensed-matter physics2,3. Despite notable advancements4-6, the accessible temperatures in these optical lattic…
View article: Topological Phase Transitions and Mixed State Order in a Hubbard Quantum Simulator
Topological Phase Transitions and Mixed State Order in a Hubbard Quantum Simulator Open
Topological phase transitions challenge conventional paradigms in many-body physics by separating phases that are locally indistinguishable yet globally distinct. Using a quantum simulator of interacting erbium atoms in an optical lattice,…
View article: A Mega-FPS low light camera
A Mega-FPS low light camera Open
From biology and astronomy to quantum optics, there is a critical need for high frame rate, high quantum efficiency imaging. In practice, most cameras only satisfy one of these requirements. Here we introduce interlaced fast kinetics imagi…
View article: Canted magnetism and $\mathbb{Z}_2$ fractionalization in metallic states of the Lieb lattice Hubbard model near quarter filling
Canted magnetism and $\mathbb{Z}_2$ fractionalization in metallic states of the Lieb lattice Hubbard model near quarter filling Open
A recent experiment has examined ultracold, fermionic, spin-1/2 $^6$Li atoms in the Lieb lattice at different Hubbard repulsion $U$ and filling fractions $ν$ (Lebrat et al. arXiv:2404.17555). At $ν=1/2$ and small $U$, they observe an enhan…
View article: Quantum coarsening and collective dynamics on a programmable simulator
Quantum coarsening and collective dynamics on a programmable simulator Open
Understanding the collective quantum dynamics of non-equilibrium many-body systems is an outstanding challenge in quantum science. In particular, dynamics driven by quantum fluctuations are important for the formation of exotic quantum pha…
View article: A neutral-atom Hubbard quantum simulator in the cryogenic regime
A neutral-atom Hubbard quantum simulator in the cryogenic regime Open
Ultracold fermionic atoms in optical lattices offer pristine realizations of Hubbard models, which are fundamental to modern condensed matter physics. Despite significant advancements, the accessible temperatures in these optical lattice m…
View article: Probing the Kitaev honeycomb model on a neutral-atom quantum computer
Probing the Kitaev honeycomb model on a neutral-atom quantum computer Open
Quantum simulations of many-body systems are among the most promising applications of quantum computers. In particular, models based on strongly-correlated fermions are central to our understanding of quantum chemistry and materials proble…
View article: Fast single atom imaging for optical lattice arrays
Fast single atom imaging for optical lattice arrays Open
High-resolution fluorescence imaging of ultracold atoms and molecules is paramount to performing quantum simulation and computation in optical lattices and tweezers. Imaging durations in these experiments typically range from a millisecond…
View article: Experimental Demonstration of Logical Magic State Distillation
Experimental Demonstration of Logical Magic State Distillation Open
Realizing universal fault-tolerant quantum computation is a key goal in quantum information science. By encoding quantum information into logical qubits utilizing quantum error correcting codes, physical errors can be detected and correcte…
View article: Spin Squeezing with Magnetic Dipoles
Spin Squeezing with Magnetic Dipoles Open
Entanglement can improve the measurement precision of quantum sensors beyond the shot noise limit. Neutral atoms, the basis of some of the most precise and accurate optical clocks and interferometers, do not naturally exhibit all-to-all in…
View article: Quantum coarsening and collective dynamics on a programmable simulator
Quantum coarsening and collective dynamics on a programmable simulator Open
Understanding the collective quantum dynamics of nonequilibrium many-body systems is an outstanding challenge in quantum science. In particular, dynamics driven by quantum fluctuations are important for the formation of exotic quantum phas…
View article: Ferrimagnetism of ultracold fermions in a multi-band Hubbard system
Ferrimagnetism of ultracold fermions in a multi-band Hubbard system Open
Strongly correlated materials feature multiple electronic orbitals which are crucial to accurately understand their many-body properties, from cuprate materials to twisted bilayer graphene. In such multi-band models, quantum interference c…
View article: Fast single atom imaging for optical lattice arrays
Fast single atom imaging for optical lattice arrays Open
High-resolution fluorescence imaging of ultracold atoms and molecules is paramount to performing quantum simulation and computation in optical lattices and tweezers. Imaging durations in these experiments typically range from a millisecond…
View article: Adiabatic State Preparation in a Quantum Ising Spin Chain
Adiabatic State Preparation in a Quantum Ising Spin Chain Open
We report on adiabatic state preparation in the one-dimensional quantum Ising model using ultracold bosons in a tilted optical lattice. We prepare many-body ground states of controllable system sizes and observe enhanced fluctuations aroun…
View article: Growing extended Laughlin states in a quantum gas microscope: A patchwork construction
Growing extended Laughlin states in a quantum gas microscope: A patchwork construction Open
The study of fractional Chern insulators and their exotic anyonic excitations poses a major challenge in current experimental and theoretical research. Quantum simulators, in particular ultracold atoms in optical lattices, provide a promis…
View article: Logical quantum processor based on reconfigurable atom arrays
Logical quantum processor based on reconfigurable atom arrays Open
Suppressing errors is the central challenge for useful quantum computing, requiring quantum error correction for large-scale processing. However, the overhead in the realization of error-corrected ``logical'' qubits, where information is e…
View article: A ship-in-a-bottle quantum gas microscope setup for magnetic mixtures
A ship-in-a-bottle quantum gas microscope setup for magnetic mixtures Open
Quantum gas microscopes are versatile and powerful tools for fundamental science as well as promising candidates for enticing applications such as in quantum simulation or quantum computation. Here we present a quantum gas microscopy setup…