Recently reactor neutrino experiments have made important contributions to the neutrino oscillation. I will introduce the Daya Bay experiment which observed for the first time the neutrino mixing angle θ13 with a statistical significance of 5.2 σ. The concept of the experiment, the detector construction and data analysis will be described. The…
"How to make the Born-Oppenheimer approximation exact: A fresh look at potential energy surfaces and Berry phases in the vicinity of strong non-adiabatic couplings" The Born-Oppenheimer approximation is among the most fundamental ingredients of modern condensed matter physics. This approximation not only makes calculations feasible, it also…
The Large Hadron Collider (LHC) has had a successful Run I. It provided the highest energy proton collisions to-date to the experiments, at a center-of-mass energy of 8 TeV. In 2012, the observation of a new Higgs-like boson was announced to the world. There is also an extensive program at the LHC to search for physics beyond the Standard…
Most takes on quantum field theory start from microscopics, fundamental degrees of freedom, a Lagrangian. Conformal field theory is an exception—it focuses on the algebra of local operators and avoids any reference to the Lagrangian. This leads to a method for doing practical CFT calculations—the conformal bootstrap. The method is 40 years old…
In the spring of 1911, Albert Einstein moved from Zurich to the German University in Prague, taking up his first appointment as a full professor. Heavily on his mind was a project to extend the special theory of relativity (1905) to a general theory of relativity, building from his 1907 inspiration on the equivalence of inertial and…
The axion is a hypothetical elementary particle whose existence would explain the baffling absence of CP violation in strong interactions. Axions also happen to be a compelling dark-matter candidate. Even if dark-matter axions were to comprise the overwhelming majority of mass in the universe, they would be extraordinarily difficult to detect…
Progress in physics and quantum information science motivates much recent study of the behavior of extensively-entangled many-body quantum systems fully isolated from their environment, and thus undergoing unitary time evolution. What does it mean for such a system to go to thermal equilibrium? I will explain the Eigenstate Thermalization…
The anomalous Hall effect was discovered more than 130 years ago in a ferromagnet, where a Hall resistance exists even in the absence of an external magnetic field. The quantized version of the anomalous Hall effect has attracted much interest since the discovery of quantum Hall effect in the 1980s. A few years ago, it was proposed that the…
We will discuss recent developments at a new scientific interface involving quantum many-body dynamics of strongly interacting systems. Combining advances in several sub-fields of physical science, this research is aimed at realizing new states of matter that can exist far from equilibrium, and exploring novel science and applications of such…
Molecules cooled to ultralow temperatures provide fundamental new insights to molecular interaction dynamics in the quantum regime. In recent years, researchers from various scientific disciplines such as atomic, optical, condensed matter physics, physical chemistry, and quantum science have started working together to explore many emergent…
Neutrinos are one of the most fascinating particles that occur in nature: hundreds of millions of times smaller than the proton, the neutrino was once thought to be massless and to travel at the speed of light. Huge strides have been made in our understanding of neutrinos in past decades, with the resolution of the solar neutrino problem…
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