Patterning surfaces with subwavelength spaced metallo-dielectric features (metasurfaces) allows one to generate complex 3D and 2D wavefronts by locally controlling the amplitude, phase and polarization of the scattered light. [more]

Spectroscopic analysis allows for the label-free objective classification of biological material on the molecular scale. This technique has been applied to histology, cytology and surgical pathology and can detect subtle changes in the proteome and metabolome. [more]

We consider a thought experiment where the preparation of a macroscopically massive or charged particle in a quantum superposition and the associated dynamics of a distant test particle apparently allow for superluminal communication. [more]

Deep insights into the structure of a many-body state can often be inferred from its natural orbitals (eigenvectors of the reduced one-body density operator) and their populations. [more]

The fractional quantum Hall effect is the most celebrate example of a two-dimensional phase that exhibits intrinsic topological order. [more]

When a quantum system is subjected to a continuous measurement, its evolution becomes stochastic and in a proper limit, it can be described by a continuous equation with Gaussian noise. [more]

Since the discovery of the vapor-liquid-solid (VLS) mechanism for semiconductor nanowire (NW) growth over 50 years ago, semiconductor NWs have been a widely studied technology in various areas including photonics, plasmonics, and electronics. [more]

In the last few years there has been an increasing interest in the potential of quantum improvements in machine learning (ML) and artificial intelligence (AI). [more]

In this talk, I will discuss our progress in the development of a two-photon laser-cooling scheme for hydrogen.  [more]

Casimir-Polder forces and their consequences: from matter-wave scattering in complex geometries to CP violation and quantum friction Casimir-Polder forces between a single atom and a macroscopic body are effective electromagnetic interactions that may be attributed to the vacuum fluctuations of the electromagnetic field. [more]

Atomic gases at ultralow temperatures prepared in optical lattice potentials provide an exquisite platform to study many-body quantum systems out of equilibrium. [more]

Quantum optics and many-body physics increasingly merge together in ultracold atomic gases and certain classes of solid state systems. This gives rise to new non-equilibrium scenarios even in stationary state, where coherent and dissipative dynamics appear on an equal footing. [more]

Dynamical phase transitions can occur in isolated quantum systems that are brought out of equilibrium by either a sudden or a gradual change of their parameters. [more]

Microfabricated surface traps enable a wide range of trapping geometries and provide a scalable platform for trapped ion Quantum Information Processing (QIP). [more]

The way in which quantities such as energy, classical and quantum information, and entanglement propagate through extended systems is of great interest from quantum field theory to condensed matter systems. [more]

The Abelian Higgs model in 1 space and 1 time dimensions has important features in common with models relevant for high energy physics: confinement and existence of topological solutions of the classical equations of motion. [more]

In 2010 the first measurement of the proton charge radius from spectroscopy of muonic hydrogen was found to be five standard deviations away from the regular hydrogen value. [more]

In order to increase the electron energy gain by the laser wakefield acceleration (LWFA), three ways are known. The first way is to multi-stage the LWFA beyond the dephasing length. The second method is to decrease the plasma density so that the dephasing length is increased. [more]

The ability to manipulate molecules with electric fields offers new opportunities for studying cold collisions and performing precision tests. [more]

In the present talk I will give an overview on the physics of 2-component Bose gases in presence of a spin exchange Rabi term. [more]

Many-body systems with both coherent dynamics and dissipation constitute a rich class of models which are nevertheless much less explored than their dissipationless counterparts. The advent of numerous experimental platforms that simulate such dynamics poses an immediate challenge to systematically understand and classify these models. [more]

Many large-scale, universal, effects in one-dimensional systems at quantum critical points can be tackled with a combination of methods from solvable lattice models and from field theory, usually conformal field theory (CFT) and Luttinger liquid ideas. [more]

I will discuss two research lines I'm developing. [more]

Trapping ultracold atoms in optical lattices enabled numerous breakthroughs uniting several disciplines. Although light is a key ingredient in such systems, its quantum properties are typically neglected, reducing its role to a classical tool for atom manipulation. [more]

Tests of quantumness are experiments which enable us to exclude the possibility of modeling them with classical means. They enable us to prove strong statements about the nature of the universe and obtain cryptographic protocols with an unprecedented level of security. [more]

Cold atoms can now be routinely prepared and precisely controlled for the study of quantum physics. [more]

The Quantum Community in Munich launches its International Max Planck Research School for Quantum Science and Technology (IMPRS-QST). To this end, we celebrate the IMPRS Launch with several Quantum talks on Thursday at the Herbert Walther lecture hall (MPQ,Garching). On Friday afternoon, our members from the Walther-Meissner Institute will present their work on the MQC Workshop together with a subsequent poster session. [more]

This talk aims to offer insight into the latest developments at the APS Editorial Office and its flagship publication. [more]

A central question in quantum computation is to identify the resources that are responsible for quantum speed-up. Quantum contextuality has been recently shown to be a resource for quantum computation with magic states for odd-prime dimensional qudits and two-dimensional systems with real wavefunctions. ... [more]

Nodal semimetals are materials in which the conduction and the valence bands touch at points or lines in the Brillouin zone. Such nodal band structures manifest themselves in unusual transport phenomena as well as in topologically protected surface states. ... [more]