Edward P. Tryon is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 scientist from Terre Haute, Indiana

Terre Haute, Indiana

Terre Haute is a city and the county seat of Vigo County, Indiana, United States, near the state's western border with Illinois. As of the 2010 census, the city had a total population of 60,785 and its metropolitan area had a population of 170,943. The city is the county seat of Vigo County and...

 and a professor of physics

Physics

Physics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...

 at Hunter College

Hunter College

Hunter College, established in 1870, is a public university and one of the constituent colleges of the City University of New York, located on Manhattan's Upper East Side. Hunter grants undergraduate, graduate, and post-graduate degrees in more than one hundred fields of study, and is recognized...

 in Manhattan

Manhattan

Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York...

. His specialization is in theoretical quark

Quark

A quark is an elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei. Due to a phenomenon known as color confinement, quarks are never directly...

 models, theoretical general relativity

General relativity

General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1916. It is the current description of gravitation in modern physics...

, and cosmology

Physical cosmology

Physical cosmology, as a branch of astronomy, is the study of the largest-scale structures and dynamics of the universe and is concerned with fundamental questions about its formation and evolution. For most of human history, it was a branch of metaphysics and religion...

. In 1973 he proposed that the universe is a large-scale vacuum energy

Vacuum energy

Vacuum energy is an underlying background energy that exists in space even when the space is devoid of matter . The concept of vacuum energy has been deduced from the concept of virtual particles, which is itself derived from the energy-time uncertainty principle...

fluctuation. He has been quoted as saying, "the universe is simply one of those things that happens from time to time."

Works

• Tryon, Edward P. "Is the Universe a Vacuum Fluctuation," in Nature, 246(1973), pp. 396–397.