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Search Publications by: Xiao Tang (Assoc)

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Displaying 176 - 200 of 202

High Speed Fiber-Based Quantum Key Distribution using Polarization Encoding

October 5, 2005
Author(s)
Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Barry J. Hershman, Joshua Bienfang, Ronald Boisvert, Charles W. Clark, Carl J. Williams, A Gross, E Hagley, J Wen
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

High Speed Fiber-Based Quantum Key Distribution Using Polarization Encoding

October 1, 2005
Author(s)
Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Barry J. Hershman, J Bienfan, Ronald Boisvert, Charles W. Clark, Carl J. Williams
The n-qubit concurrence canonical decomposition (CCD) is a generalization of the two-qubit canonical decomposition SU(4)=[SU(2) (x) SU(2)] ? [SU(2) (x) SU(2)], where ? is the commutative group which phases the maximally entangled Bell basis. A prequel

Change Detection In XML Documents

March 1, 2003
Author(s)
K H. Lee, Y C. Choy, S B. Cho, Xiao Tang, V R. McCrary
This paper presents an efficient algorithm to detect changes between old and new versions of an XML document. The difference between the two versions can be considered to be an edit script that transforms one document tree into another. The proposed

High Precision Measurement of Reflectance for Films Under Substrates

December 1, 2002
Author(s)
Xiao Tang, Jian Zheng
A more accurate methodology to measure the reflectance of optical disks, taking into consideration the scattering losses at the surfaces of the disk, is proposed by the National Institute of Standards and Technology (NIST). The proposed method is a

High-Speed Quantum Communication Testbed

December 1, 2002
Author(s)
Carl J. Williams, Xiao Tang, M Hiekkero, J Rouzard, R Lu, A Goedecke, Alan L. Migdall, Alan Mink, Anastase Nakassis, Leticia S. Pibida
We describe the current status of the NIST Quantum Communication Testbed (QCT) facility. QCT is a facility for exploring quantum communication in an enviornment similar to that projected for early commercial implementations: quantum cryptographic key

Document Reverse Engineering: From Paper to XML

August 1, 2002
Author(s)
K H. Lee, Y C. Choy, S B. Cho, Xiao Tang, V R. McCrary
With the widespread of XML documents on the Web, there is a growing interest in transforming paper-based documents into XML representations. In this paper, we present a syntactic method for logical structure analysis of documents with multiple pages and

Reflectance Calibration Standard for Optical Discs

January 1, 2002
Author(s)
Xiao Tang, Jian Zheng
An accurate method for the determination of reflectance of reference discs has been developed at NIST. The discs can be used as a traceable industry standard in the calibration of optical disc testing equipment.

The State of the Art and Practice in Digital Preservation

January 1, 2002
Author(s)
K H. Lee, Oliver T. Slattery, R Lu, Xiao Tang, V R. McCrary
The goal of digital preservation is to ensure long-term access to digitally stored information. In this paper, we try to present a comprehensive survey of techniques used in digital preservation. We also introduce representative digital preservation

An Auto-Focusing Method in Microscopic Testbed for Optical Discs

July 1, 2000
Author(s)
Xiao Tang, P L'Hostis, Y Xiao
An auto-focusing method is described and practically applied to an optical disc test-bed. In this application, an optical microscope was used to create clear pit images of optical discs. A CCD camera generated the graphic signals for the images. A standard