Emanuel Knill

Publications

Joint Quantum State and Measurement Tomography with Incomplete Measurements

October 12, 2018

Author(s):

Adam C. Keith, Charles H. Baldwin, Scott C. Glancy, Emanuel H. Knill

Estimation of quantum states and measurements is crucial for the implementation of quantum information protocols. The standard method for each is quantum...

Experimentally Generated Random Numbers Certified by the Impossibility of Superluminal Signaling

April 11, 2018

Author(s):

Peter L. Bierhorst, Emanuel H. Knill, Scott C. Glancy, Yanbao Zhang, Alan Mink, Stephen P. Jordan, Andrea Rommal, Yi-Kai Liu, Bradley Christensen, Sae Woo Nam, Martin J. Stevens, Lynden K. Shalm

From dice to modern complex circuits, there have been many attempts to build increasingly better devices to generate random numbers. Today, randomness is...

Chained Bell inequality experiment with high-efficiency measurements

March 28, 2017

Author(s):

Ting Rei Tan, Stephen D. Erickson, Peter L. Bierhorst, Daniel Kienzler, Scott C. Glancy, Emanuel H. Knill, Dietrich G. Leibfried, David J. Wineland, Yong Wan

We report correlation measurements on two 9Be+ ions that violate a chained Bell inequality obeyed by any local-realistic theory. The correlations can be...

Preparation of entangled states through Hilbert space engineering

September 28, 2016

Author(s):

Yiheng Lin, John P. Gaebler, Florentin Reiter, Ting Rei Tan, Ryan S. Bowler, Yong Wan, Adam C. Keith, Emanuel H. Knill, Kevin J. Coakley, Dietrich G. Leibfried, David J. Wineland, Scott C. Glancy

Entangled states are a crucial resource for quantum-based technologies such as quantum computers and quantum communication systems. Exploring new methods for...

High Fidelity Universal Gate Set for 9Be+ Ion Qubits

August 04, 2016

Author(s):

John P. Gaebler, Ting Rei Tan, Yong Wan, Yiheng Lin, Ryan S. Bowler, Adam C. Keith, Scott C. Glancy, Kevin J. Coakley, Emanuel H. Knill, Dietrich G. Leibfried, David J. Wineland

We report high-fidelity laser-beam-induced quantum logic gates on qubits comprised of hyperfine states in 9Be+ ions, achieved in part through a combination of...