Research

Phoniton named UMD Invention of the Year Finalist

April 17th, 2012  |  by  |  published in All, News, Phonitons

Could the Next World-Changing Technology Emerge From UMD? (Not exactly how we would hype it, but we appreciate the support!) Phonitons as a Sound-based Analogue of Cavity Quantum Electrodynamics Charles George Tahan, Rousko Todorov Hristov, Oney O. Soykal Researchers at the University of Maryland and the National Security Agency (NSA) have developed the analog of […]

Introducing the phoniton: A sound-based analogue of cavity-QED, a tool for controlling sound at the quantum level

November 28th, 2011  |  by  |  published in All, Blog, Featured, Highlights, Nanotechnology, Papers, Phonitons, Research

Introducing the phoniton: A sound-based analogue of cavity-QED, a tool for controlling sound at the quantum level

This work explores the possibility of a new, man-made quantum object: a hybridization of a localized, long-lived phonon (a quantum of sound) and a matter excitation. That this is possible is not obvious.

Physics of silicon quantum dot qubits

September 27th, 2010  |  by  |  published in All, Conferences, Featured, Highlights, Quantum Computing

Physics of silicon quantum dot qubits

The spin of an electron in silicon may act as an information carrier in future information technologies, from quantum computers to spintronics. For quantum information applications, the spin of cold localized electrons in silicon can make a good quantum memory due to the purifiability of the spin environment (a spin-0 nuclear isotope is available) and […]

Quantum phase transitions in photonic cavities with two-level systems

May 22nd, 2008  |  by  |  published in All, Papers, Research, Solid Light

Phys. Rev. A, 77, 5, 053819 (2008)

Systems of coupled photonic cavities have been predicted to exhibit quantum phase transitions by analogy with the Hubbard model. To this end, we have studied topologies of few (up to six) photonic cavities each containing a single two-level system. Quantum phase space diagrams are produced for these systems, and compared to mean-field results. We also consider finite effective temperature, and compare this to the notion of disorder. We find the extent of the Mott lobes shrink analogously to the conventional Bose-Hubbard model.

Nanotechnology, Quantum Information Technology, Society: Course, Definitions, Essays

February 8th, 2008  |  by  |  published in All, Technology and Society

Exploring advanced classical and quantum technologies and their societal implications. Definitions and essays on nanotechnology and quantum technology.

Quantum Information Technology and Industry

February 7th, 2008  |  by  |  published in All, Essays, Featured, Technology and Society

Quantum Information Technology and Industry

A new era of physics careers in industry is about to begin, based on the quantum information science/technology (QIS/T) revolution. Whether this statement is true, or can be made to be true, is something we should consider. From my viewpoint, the chances are improving, but there are still roadblocks.

Read more…

Quantum phase transitions of light

November 1st, 2007  |  by  |  published in All, Featured, Highlights, Solid Light

Quantum phase transitions of light

As physics and engineering extend their reach to the control of single excitations of nature, we gain the ability to explore and even design the interaction of matter and energy in fundamentally new ways. One of the most interesting opportunities this presents is controllable interactions between many quantum particles — such as electrons — which is traditionally the realm of condensed matter physics. The questions we asked ourselves were these: Can we also do this with light? Can it be useful? We show that the answer is YES!

Spookytechnology and Society

October 12th, 2007  |  by  |  published in All, Blog, Essays, Highlights, Technology and Society

Spookytechnology and Society

Spookytechnology and Society: Understanding and anticipating the second revolution in quantum-designed technologies Download the article this summary is based on: C. Tahan, Spookytechnology and Society, submitted for publication. The original preprint can be found on the arxiv (Oct 12, 2007): arXiv:0710.2537. • tahan.com/charlie: Technology and Society • Wikipedia: quantum physics, quantum entanglement, quantum computer Some early press on the preprint […]

Preprint: Spookytechnology and Society

October 12th, 2007  |  by  |  published in All, Preprints, Research, Technology and Society

New technologies based on the exploitation of so-called “second order” quantum phenomena – such as quantum entanglement – deserve a public-friendly, rational, and sexy name. Spookytechnology is that unifying term. From historical and motivational perspectives, this name has greater value than the many variations of quantum this and quantum that presently used. As many already believe, the pursuit of spookytechnology has profound implications for the development of the physical and information sciences and ultimately for society at large. Spookytechnology will find its place in the increasingly dense line of major technological revolutions of our time: quantum, info, bio, nano, spooky.

Chapter: The Nanotechnology R(evolution)

December 23rd, 2006  |  by  |  published in All, Essays, Preprints, Technology and Society

Nanotechnology as a social concept and investment focal point has drawn much attention. Here we consider the place of nanotechnology in the second great technological revolution of mankind that began some 200 years ago. The so-called nanotechnology revolution represents both a continuation of prior science and technology trends and a re-awakening to the benefits of significant investment in fundamental research. We consider the role the military might play in the development of nanotechnology innovations, nanotechnology’s context in the history of technology, and the global competition to lead the next technological revolution.

Tahan Research

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