NIST - Quantum Information

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Ion string

What is Quantum Information?

The Beginning of Quantum Information at NIST
The starting point for quantum information at NIST was in 1995 when the Ion Storage Group demonstrated the first quantum-logic gate. The paper that describes this important first step is "Demonstration of a Fundamental Quantum Logic Gate" (PDF, 421 kB).

Research Groups involved in the NIST Quantum Information Program
- Ion Storage Group (NIST, Boulder)
- Laser Cooling and Trapping Group (NIST, Gaithersburg)
- BEC Group (JILA, U. Colorado/NIST, Boulder)
- Quantum Processes Group (NIST, Gaithersburg)
- Electron and Optical Physics Division (NIST, Gaithersburg)

Press Releases:
- Design Proposed for Large-Scale Quantum Computer
- Quantum Communication Award Goes to Wineland and Monroe of the Physics Laboratory
- NIST's Cornell Elected to National Academy of Sciences
- NIST Scientists Cross the Bridge between Atomic and Real Worlds
- Wieman and Cornell Receive Benjamin Franklin Medal in Physics
- Dr. William D. Phillips shares the 1997 Nobel Prize in Physics
- Phillips Elected to National Academy of Science
- Schrödinger's Cat In an Atomic Cage

Select Publications:     [ Get Acrobat PDF viewer ]
- "Architecture for a large-scale ion-trap quantum computer" (PDF, 154 kB), D. Kielpinski, C.  Monroe, D.J.  Wineland Nature, 417, 709-711 (2002).
- "A decoherence-free quantum memory using trapped ions" (PDF, 115 kB), D. Kielpinski, V. Meyer, M.A. Rowe, C.A. Sackett, W.M. Itano, C. Monroe, and D.J. Wineland, Science, 291, 1013-1015 (2001).
- "Experimental violation of Bell's inequalities with efficient detection" (PDF, 128 kB), M.A. Rowe, D. Kielpinski, V. Meyer, C.A. Sackett, W.M. Itano, C. Monroe, and D.J. Wineland, Nature, 409, 791-794 (2001).
- "Experimental Demonstration of Entanglement- Enhanced Rotation Angle Estimation Using Trapped Ions" (PDF, 157 kB), V. Meyer, M.A. Rowe, D. Kielpinski, C.A. Sackett, W.M. Itano, C. Monroe, and D.J. Wineland, Phys. Rev. Lett. 86, 5870-5873 (2001).
- "Scalable Entanglement of Trapped Ions" (PDF, 163 kB), C. Monroe, C.A. Sackett, D. Kielpinski, B.E. King, C. Langer, V. Meyer, C. Myatt, M. Rowe, Q. Turchette, W.M. Itano, and D.J. Wineland, in Atomic Physics 17, ed. by E. Arimondo, P. De Natale, and M. Inguscio (AIP Conf. Proc. 551, Melville, NY, 2001, ISBN 1-56396-982-3), pp. 173-186.
- "Computing with atoms and molecules?" (PDF, 523 kB), C. Monroe and D.J.  Wineland, Sci. Spect. Issue 23, 72-79 (2000).
- "The Atom Laser," (PDF 967 kB), E.W. Hagley, L. Deng, W.D. Phillips, K. Burnett, and C.W. Clark, Opt. Photon. News (May 2001) p. 22.


Physics Laboratory home page

NIST home page

Workshop on Quantum Information Science and Emerging Technologies

The Workshop on Quantum Information Science and Emerging Technologies (QISET), took place in Boulder, Colorado, April 28-30 2004 (read more).

Program and online presentations

Postdoctoral research associateship opportunities in quantum information

DARPA FoQuS Participants
The web page http://qubit.nist.gov/FoQuS/foqus.html is aimed at providing information to potential NIST collaborators interested in a team focused on Atomic Approaches to Quantum Computing. While individual NIST investigators may join other teams, NIST scientists have decided that a major program focused on ion trap and neutral atoms will be broadly coordinated at NIST.

Quantum Information Program at NIST

In 2000, the director and deputy director of NIST established the NIST Quantum Information Program. This program is a coordinated effort to build the first (prototype) quantum logic processor consisting of approximately 10 qubits. The prototype device will be used to provide a proof-in-principle of the ability to process quantum information, demonstrate stabilized quantum memory, and quantum error correction, quantum repeater without output coupling, and to implement optimal quantum strategies for precision measurement.

The NIST Quantum Information Program is an effort that builds on the broad internationally recognized research program involving trapped ions by the NIST Physics Laboratory's Ion Storage Group headed by David Wineland. The expanded effort includes an additional experimental approach based on neutral atoms involving the Laser Cooling and Trapping Group headed by William Phillips, the 1997 Nobel Prize winner in Physics, and the NIST BEC group at JILA led by Eric Cornell, the 2001 Nobel Prize winner in Physics. The effort also includes modeling and theory of quantum devices and quantum information by the Quantum Processes Group led by Paul Julienne and the Electron and Optical Physics Division led by Charles Clark.

Additional Quantum Information Activities at NIST
- Large area Josephson junctions to create macroscopic qubits and to perform quantum logic operations, led by John Martinis.
- Study of single electron transistors (SETs)led by Neil Zimmerman. Charge offset noise is a key problem that must be overcome for most implementations of quantum information processing in solid-state systems.

NIST also has a multi-laboratory effort underway in support of quantum communication that is supported in part by the Defense Advanced Research Projects Agency (DARPA) under its Quantum Information Science and Technology (QuIST) program. This effort entitled A Scalable Quantum Information Network is led by Carl Williams and includes representatives of the Electronics and Electrical Engineering Laboratory, the Information Technology Laboratory, and the Physics Laboratory.


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Online: September 2001   -   Last update: June 21, 2004

Teleportation ion trap made of gold electrodes
Teleportation takes place inside an ion trap made of gold electrodes deposited onto alumina. The trap area is the horizontal opening near the center of the image. Press Release

Demonstration of NIST Quantum Communication Testbed
NIST Quantum Communication Testbed demonstrates the exchange of sifted quantum cryptographic key over a 730 meter free-space link at rates of up to 1.0 Mbps, two orders of magnitude faster than previously reported results. Press Release

Technical paper in Optics Express


Schematic of an ion trap architecture
A schematic of an ion trap architecture that could possibly lead to a large scale ion-trap quantum computer. The figure shows memory qubits in a quantum register and an accumulator where the qubits in the quantum register can be moved together to undergo quantum operations.

Atoms trapped in an optical lattice
An illustration showing one atom per optical lattice site. The Laser Cooling and Trapping Group hope to achieve this in the near future.

potential surfaces for atoms above a crossed linear waveguide.
The red "tear drops" are 100 µK potential surfaces for atoms above a crossed linear waveguide. These are calculations by the Quantum Processes Group on nanostructures that could potentially be useful for trapping and manipulating qubits.

Technical inquiries: carl.williams@nist.gov
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Copies of PDF documents: gail.newrock@nist.gov

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