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- Richard J. Hughes, William T. Buttler, +6 authors C. M. Simmons
- QCQC
- 1998

- Richard J. Hughes, William T. Buttler, +5 authors Charles M. Simmons
- 1997

The secure distribution of the secret random bit sequences known as " key " material, is an essential precursor to their use for the encryption and decryption of confidential communications. Quantum cryptography is an emerging technology for secure key distribution with single-photon transmissions: Heisenberg's uncertainty principle ensures that an… (More)

- S K Lamoreaux, W T Buttler
- Physical review. E, Statistical, nonlinear, and…
- 2005

A general analysis of thermal noise in torsion pendulums is presented. The specific case where the torsion angle is kept fixed by electronic feedback is analyzed. This analysis is applied to a recent experiment that employed a torsion pendulum to measure the Casimir force. The ultimate limit to the distance at which the Casimir force can be measured to high… (More)

- Guy Dimonte, G Terrones, +7 authors D L Preston
- Physical review letters
- 2011

We use the Richtmyer-Meshkov instability (RMI) at a metal-gas interface to infer the metal's yield stress (Y) under shock loading and release. We first model how Y stabilizes the RMI using hydrodynamics simulations with a perfectly plastic constitutive relation for copper (Cu). The model is then tested with molecular dynamics (MD) of crystalline Cu by… (More)

- Richard J. Hughes, William T. Buttler, +4 authors Glen Peterson
- 1999

Quantum cryptography is an emerging technology in which two parties may simultaneously generate shared, secret cryptographic key material using the transmission of quantum states of light. The security of these transmissions is based on the inviolability of the laws of quantum mechanics and information-theoretically secure post-processing methods. An… (More)

- William T Buttler, Steven K Lamoreaux
- Applied optics
- 2010

We formalize the physics of an optical heterodyne accelerometer that allows measurement of low and high velocities from material surfaces under high strain. The proposed apparatus incorporates currently common optical velocimetry techniques used in shock physics, with interferometric techniques developed to self-stabilize and passively balance… (More)

- M E Hayden, G Archibald, +11 authors S I Penttila
- Physical review letters
- 2004

We describe a neutron radiography technique that can be used to map the distribution of 3He impurities in liquid 4He, providing direct and quantitative access to underlying transport processes. Images reflecting finite normal- and superfluid-component 4He velocity fields are presented.

- William T. Buttler, Steven K. Lamoreaux, Justin R. Torgerson
- Quantum Information & Computation
- 2012

- Damian C Swift, Charles A Forest, David A Clark, William T Buttler, Mark Marr-Lyon, Paul Rightley
- The Review of scientific instruments
- 2007

The hydrodynamic operation of the "Forest Flyer" type of explosive launching system for shock physics projectiles was investigated in detail using one and two dimensional continuum dynamics simulations. The simulations were numerically converged and insensitive to uncertainties in the material properties; they reproduced the speed of the projectile and the… (More)

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