![]() ![]() By understanding the properties of electronic excited states, we can predict reaction rates and reaction pathways, and thereby better understand the chemistry of molecules.įigure 1. In particular, electronic excited states are a key component of many chemical reactions and physical processes such as fluorescence emissions. (See Figure 1.) Properties of electronic excited states are important in chemistry and condensed matter physics. This change in the electronic configuration of the molecule leaves the molecule in an excited state. Photons of visible (or ultraviolet) light can be absorbed by the electrons orbiting the molecule’s atoms, causing them to move from a low energy orbit to a higher energy one. For example, microwaves may cause the molecule to rotate, while infrared light may cause the molecule to vibrate. When a beam of light is incident on a molecule, the molecule responds in a manner depending on the energy of photons in the beam. Here, we are using the word “light” in a loose sense: the visible light we see makes up only a small part of the electromagnetic spectrum, which also includes X-rays, infrared radiation, microwaves, and radio waves. Each photon carries a specific quantity of energy, which is determined by the frequency (colour) of its light. In this article we will explain how we used IBM’s Qiskit software stack in combination with our own proprietary t|ket〉compiler, to compute the excited states of a simple molecule, lithium hydride (LiH).Ī fundamental discovery of quantum mechanics is that light rays - which we typically think of as behaving like waves - can also be described in terms of discrete units called photons. At Cambridge Quantum Computing (CQC), we have been working hard to make this possibility a reality. Ron Wyden.Exploring molecular excited states using Qiskit software stackīy David Muñoz Ramo, Silas Dilkes, Seyon Sivarajah and Ross DuncanĬAMBRIDGE,UK - Among the many groundbreaking uses of quantum computers, calculating the properties of molecules is one of the most promising. Gabe has also worked in industry, at Intel Labs, and in the policy sphere, working in the United States Senate in the personal office of Sen. ![]() He has broad research interests in security and cryptography, spanning theoretical cryptography to usable security, and is passionate about preparing cryptographic systems for deployment beyond the laboratory. He earned his PhD in Computer Science from Johns Hopkins University in 2020, under the supervision of his advisors Avi Rubin and Matt Green. Gabe Kaptchuk is a Research Assistant Professor in Boston University's Department of Computer Science and a Civic Technology Fellow in Boston University's Faculty of Computing and Data Science. Finally, I conclude by discussing how working in these seemingly different research areas is actually highly complementary and necessary.ĭr. Third, I discuss my work (ACM CCS'21) studying how users understand differentially private systems when the encounter them in the wild. ![]() In the second part, I will discuss my work (ACM CCS'21) constructing cryptographic applications that allow sensitive communication to avoid censorship using realistic steganography. In the first part, I will discuss my recent work (Eurocrypt '21) that studies the feasibility of constructing encrypted communication systems that allow for law enforcement access while being robust against abuse. In this talk, I will illustrate my full-stack approach by giving an overview of three of my recent works, each of which is representative of a different part of the privacy stack. As such, I conduct research into privacy preserving systems in a "full-stack" manner and work across traditional security and privacy research areas, including core cryptography, applications of cryptography, and analysis of the social impact of cryptographic deployments. My research is motivated by the need to build privacy preserving systems that serve the needs of real people. Research Assistant Professor of Computer Scienceįull-Stack Privacy: Cryptography to People and Back Again
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