Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session X01: Kavli Symposium 2022Invited Live Streamed Special Event Undergrad Friendly

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Sponsoring Units: APS Chair: Eva Andrei, Rutgers University; David Campbell, Boston University Room: McCormick Place W375E 
Thursday, March 17, 2022 6:15PM  6:51PM 
X01.00001: Majorana edge modes in topological superconductors Invited Speaker: Carlo W Beenakker Twodimensional superconductors with broken timereversal symmetry have been predicted to support topologically protected chiral edge states, providing a superconducting counterpart to the quantum Hall effect in semiconductors. The edge states carry chargeneutral quasiparticles, coherent superpositions of electrons and holes referred to as "Majorana fermions". We present an overview of electrical and thermal probes of the superconducting edge states, focusing on unique signatures of their Majorana nature and on applications for topological quantum computation. In particular, we show how topological qubits can be braided by injecting them into the conducting edge of a superconductor. 
Thursday, March 17, 2022 6:51PM  7:27PM 
X01.00002: The New International System of Units: A vision of Max Planck comes true Invited Speaker: Klaus Von Klitzing The discovery of the quantum Hall effect (QHE) revolutionized our international system of units (SI units). High precision measurements of the quantized Hall resistance opened up the way to relate fundamental constants directly to measured quantities. This triggered the introduction of a new international system of units based on constants of nature. The quantized Hall resistance is not only important for electrical standards but also for the realization of the mass unit kilogram. 
Thursday, March 17, 2022 7:27PM  8:03PM 
X01.00003: Atombyatom engineering of novel states of matter Invited Speaker: Cristiane Morais Smith Feynman’s original idea of using one quantum system that can be manipulated at will to simulate the behavior of another more complex one has flourished during the last decades in the field of cold atoms. More recently, this concept started to be developed in nanophotonics and in condensed matter. In this talk, I will discuss a few recent experiments, in which 2D electron lattices were engineered on the nanoscale using STM manipulation of adatoms on the surface of copper. First, I will show that it is possible to control the geometry of the lattice [1] and the orbital degrees of freedom [2] by building different Lieb lattices [1,2]. Then, I will show how to realize topological states of matter using the same procedure. We investigate the robustness of the zero modes in a breathing Kagome lattice, which is the first experimental realization of a designed electronic higherorder topological insulator [3], and the fate of the edge modes in a Kekule structure, upon varying the type of boundary of the sample [4]. Finally, we will control the effective dimension of the electronic structure by creating a Sierpinski gasket [57], which has dimension D = 1.58. The realization of this first quantum fractal opens the path to electronics in fractional dimensions. In addition, our recent investigation of quantum transport in fractals by using photonic quantum simulators might shed some light on the issue of consciousness [8]. 
Thursday, March 17, 2022 8:03PM  8:39PM 
X01.00004: Casimir effect meets the cosmological constant Invited Speaker: Ulf Leonhardt In 1998 astronomers discovered that the expansion of the universe is accelerating. Somehow, something must have made gravity repulsive on cosmological scales. This something was called dark energy; it is described by Einstein's cosmological constant; and it amounts to about 70% of the total mass of the universe. It has been conjectured that the cosmological constant is a form of vacuum energy, but its prediction from quantum field theory has failed by many orders of magnitude. The lecture shows how a theory informed by empirical evidence on Casimir forces does produce the correct order of magnitude and agrees with astronomical data, and how subtle this is. 
Thursday, March 17, 2022 8:39PM  9:15PM 
X01.00005: Nanomaterials and Light: Addressing 21st Century Challenges Invited Speaker: N J Halas TBD 
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