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Dr. Howard E. Brandt U.S. Army Research Laboratory (ARL)

An Isaac Newton Institute Workshop. Entanglement and Transfer of Quantum Information. Quantum Cryptographic Probing by Entanglement. Dr. Howard E. Brandt U.S. Army Research Laboratory (ARL). 27 September – 1 October 2004. p. p. 4. 4. Binary Encoding in Photon

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Dr. Howard E. Brandt U.S. Army Research Laboratory (ARL)

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  1. An Isaac Newton Institute Workshop Entanglement and Transfer of Quantum Information Quantum Cryptographic Probing by Entanglement Dr. Howard E. Brandt U.S. Army Research Laboratory (ARL) 27 September – 1 October 2004

  2. p p 4 4 Binary Encoding in Photon Linear-Polarization States for BB84 Protocol = 1 = 1 p 4 = 0 = 0

  3. Probe Measuring Device M Probe U Transmitter Receiver General Entangling Probe Probe interacts unitarily with signal on its way from transmitter to legitimate receiver and is projectively measured after signal is projectively measured by legitimate receiver.

  4. (two-dimensional probe) (four-dimensional probe) (four-dimensional probe)

  5. Entangling Probe Schematic gated signal photon incident signal state CNOT gate (cavity QED / solid state / ?) gated probe photon probe photon Wollaston Prism delay switch

  6. Selected Refereed Publications on Quantum Information Processing H. E. Brandt, “Optimum probe parameters for entangling probe in quantum key distribution,” Quantum Information Processing 2, 37-79 (2003). H. E. Brandt, “Optimization problem in quantum cryptography,” J. Optics B 5, S1-4 (2003). H. E. Brandt, “Quantum measurement with a positive operator valued measure”, J. Optics B 5, S266-270 (2003). H. E. Brandt, “Probe optimization in four-state protocol of quantum cryptography,” Phys. Rev. A 66, 032303 (16) (2002). H. E. Brandt, “Secrecy capacity in the four-state protocol of quantum key distribution,” J. Math. Phys. 43, 4526-4530 (2002). H. E. Brandt, “Inconclusive rate with a positive operator valued measure,” Contemp. Math. 305, 43-52 (2002). H. E. Brandt, “Qubit Devices,” Proc. Sympos. Appl. Math. 58, 67-139 (2002). H. E. Brandt, “Deconstructing Wigner’s density matrix concerning the mind-body question,” Found. Phys. Lett. 15, 287-292 (2002).

  7. Selected Refereed Publications on Quantum Information Processing (cont.)  H. E. Brandt, “Inconclusive rate in quantum key distribution,” Phys. Rev. A 64, 042316 (5) (2001). H. E. Brandt, “Inconclusive rate as a disturbance measure in quantum cryptography,” Phys. Rev. A 62, 042310 (14) (2000). H. E. Brandt, “Eavesdropping optimization for quantum cryptography using a positive operator-valued measure,” Phys. Rev. A 59, 2665-2669 (1999). H. E. Brandt, “Positive operator valued measure in quantum information processing,” Am. J. Phys. 67, 434-439 (1999). H. E. Brandt, “Qubit devices and the issue of quantum decoherence,” Prog. Quantum Electronics 22, 257-370 (1998). H. E. Brandt, “Quantum decoherence in qubit devices,” Opt. Eng. 37, 600-609 (1998). H. E. Brandt, J. Myers, S. Lomonaco, “Aspects of entangled translucent eavesdropping in quantum cryptography,” Phys. Rev. A 56, 4456-4465 (1997). J. Myers, H. E. Brandt, “Converting a positive operator-valued measure to a design for a measuring instrument on the laboratory bench,” Meas. Sci. Technol. 8, 1222-1227 (1997).

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