In the fundamental laws of physics, gauge fields mediate the interaction between charged
particles. An example is the quantum theory of electrons interacting with the electromagnetic …

The emergence of quasiparticles in interacting matter represents one of the cornerstones of
modern physics. However, in the vicinity of a quantum critical point, the existence of …

We report on the first realization of heteronuclear dipolar quantum mixtures of highly
magnetic erbium and dysprosium atoms. With a versatile experimental setup, we …

A well-known mystery in quantum mechanics is wave–particle duality: Is an electron a point
mass or a physical wave? What is the physical meaning of its wave function? About a …

The decay of an excited atom undergoing spontaneous photon emission into the fluctuating
quantum-electrodynamic vacuum is an emblematic example of the dynamics of an open …

Mobile impurity atoms immersed in Bose–Einstein condensates provide a new platform for
exploring Bose polarons. Recent experimental advances in the field of ultracold atoms make …

We consider the ground-state properties of an impurity particle (“polaron”) resonantly
interacting with a Bose-Einstein condensate (BEC). Focusing on the equal-mass system, we …

We propose experimentally feasible means for nondestructive thermometry of
homogeneous Bose-Einstein condensates in different spatial dimensions (d∈{1, 2, 3}). Our …

We use a nonperturbative renormalization group approach to develop a unified picture of
the Bose polaron problem, where a mobile impurity is strongly interacting with a surrounding …

The Bose polaron is a quasiparticle of an impurity dressed by surrounding bosons. In few-
body physics, it is known that two identical bosons and a third distinguishable particle can …