The Institute for Nuclear Theory, a national resource funded by the US Department of Energy and the University of Washington, provides an environment for scientists to advance the frontiers of subatomic physics. Scientific meetings at the INT attract hundreds of visitors annually from around the world to hasten breakthrough discoveries through collaborations.

# Current and Upcoming Programs

**March 18 - April 19, 2019:** **Quantum Turbulence: Cold Atoms, Heavy Ions, and Neutron Stars **

* A. Bulgac, M. Forbes, B. Haskell*

Quantum turbulence lies at the heart of several nuclear physics applications. It likely plays a role in superfluid dyanmics in neutron stars and in heavy ion collisions where the rapid excitation and subsequent quench of the system stimulates a cascade of energy. This program aims to bring together experts on quantum turbulence from the fields of atomic physics, superfluid helium, nuclear physics, and astrophysics, to understand quantum dynamics and its role in explaining pulsar glitches and heavy ion collisions. ** Read more ...**

**July 1 - August 2, 2019:** **Nuclear Structure at the Crossroads **

* R. Furnstahl, H.-W. Hammer, A. Schwenk*

Effective Field Theories (EFTs) applied to nuclei and nuclear matter have had many phenomenological successes. In particular, nuclear interactions derived from chiral EFT and advances in nuclear many-body techniques have enabled rapid progress in ab initio nuclear structure calculations up to mass numbers A~100. However, the limits in mass and density of this approach are currently not known and there are open issues regarding the convergence and power counting of chiral EFT. ** Read more ...**

**August 12 - September 6, 2019:** ** Heavy-Quark Physics and Fundamental Symmetries**

*A. Bharucha, A. Crivellin, W. Detmold, M. Hoferichter*

While the LHC has not directly observed any new particles, in the last years several flavor experiments including LHCb have found very strong indications for the violation of lepton flavor universality in semi-leptonic B-meson decays. Additionally, much interest has been focused on anomalies in individual rare decays involving flavor-changing neutral currents. ** Read more ...**

# Highlights from Recent Programs

**July 30 - September 7, 2018 : Advances in Monte Carlo Techniques for Many-Body Quantum Systems **

*B.K. Clark, S. Gandolfi, F. Pederiva, M.J. Savage*

Application of Monte Carlo methods to the solution of interesting problems in physics, and particularly in Quantum Theory, has a long history. The potential capability of exactly solving for eigenstates of a given Hamiltonian collides with some well-known fundamental obstacles, such as the fermion sign problem which is caused by an exponentially decaying signal to noise ratio in the simulation. This problem spans fields such as condensed matter, quantum chemistry, lattice QCD and nuclear theory. **Read more...**

**May 7 - June 1, 2018: Multi-Scale Problems Using Effective Field Theories **

*E. Braaten, N. Brambilla, T. Schäfer, A. Vairo*

Many contemporary open problems at the frontiers of nuclear and particle physics are characterized by the existence of a separation of scales that can be exploited using effective field theories (EFTs). The EFT method treats the low energy degrees of freedom as dynamical fields, and takes into account higher-energy scales systematically through matching conditions. **Read more...**

**April 16 - 20, 2018: Astro-Solids, Dense Matter, and Gravitational Waves **

*N. Andersson, C. Horowitz, M. Alessandra Papa*

At the dawn of gravitational-wave astronomy, there is renewed focus on the range of astrophysical sources and the information that can be extracted from observations. This one-week workshop motivated new theoretical work on continuous gravitational-wave sources and improved the communication between nuclear physicists, gravitational-wave experts, and astrophysicists working on dense matter and compact objects. **Read more...**

**Feb. 26 - March 30, 2018: Nuclear ab initio Theories and Neutrino Physics **

*C. Barbieri, O. Benhar, A. Galindo-Uribarri, A. Lovato, J. Menéndez*

*Ab initio* nuclear theory have reached the degree of maturity to describe the structure and electroweak interactions of atomic nuclei. This paves the way to quantitative predictions on the interaction of neutrinos with nuclei, which span broad energy and momentum regimes. This is a required input for a quantitative study of fundamental symmetries and astrophysical processes. **Read more.**

# In the News

This particle tracker offers the first direct measurement, at the Relativistic Heavy Ion Collider (RHIC), of how charm quarks are caught up in the flow of a primordial quark-gluon ``plasma'' -- a liquid-like matter that mimics the conditions of the early universe moments after the Big Bang. [DOE Science Highlight]

The US's plan for quantum computing and quantum information science. From the dynamics of non-equilibrium matter in the early universe to the structure of nuclei, QC and QIS may provide is expected to provide a quantum advantage over classical computation in the future.

**2018 Nobel Prize in Physics**

“For groundbreaking inventions in the field of laser physics” with one half to Arthur Ashkin “for the optical tweezers and their application to biological systems” and the other half jointly to Gérard Mourou and Donna Strickland “for their method of generating high-intensity, ultra-short optical pulses”. [Nobel website]