Generation of two-mode nonclassical states and a quantum phase gate operation in trapped ion cavity QED

We propose a scheme to generate nonclassical states of a quantum system, which is composed of the one-dimensional trapped ion motion and a single cavity field mode. We show that two-mode SU(2) Schr\"odinger-cat states, entangled coherent states, two-mode squeezed vacuum states and their superposition can be generated. If the vibration mode and the cavity mode are used to represent separately a qubit, a quantum phase gate can be implemented.Comment: to appear in PR

Generation of arbitrary two dimensional motional state of a trapped ion

We present a scheme to generate an arbitrary two-dimensional quantum state of motion of a trapped ion. This proposal is based on a sequence of laser pulses, which are tuned appropriately to control transitions on the sidebands of two modes of vibration. Not more than $(M+1)(N+1)$ laser pulses are needed to generate a pure state with upper phonon number $M$ and $N$ in the $x$ and $y$ direction respectively.Comment: to appear in PR

Electron-Phonon Dynamics in an Ensemble of Nearly Isolated Nanoparticles

We investigate the electron population dynamics in an ensemble of nearly isolated insulating nanoparticles, each nanoparticle modeled as an electronic two-level system coupled to a single vibrational mode. We find that at short times the ensemble-averaged excited-state population oscillates but has a decaying envelope. At long times, the oscillations become purely sinusoidal about a ``plateau'' population, with a frequency determined by the electron-phonon interaction strength, and with an envelope that decays algebraically as t^-{1/2} We use this theory to predict electron-phonon dynamics in an ensemble of Y_2 O_3 nanoparticles.Comment: 11 pages, 3 figure

Industrial Robot Programming and UPnP Services Orchestration for the Automation of Factories

The integration of equipment and other devices built into industrial robot cells with modern Ethernet interface technologies and low‐cost mass produced devices (such as vision systems, laser scanners, force torque‐sensors, PLCs and PDAs etc.) enables integrators to offer more powerful and smarter solutions. Nevertheless, the programming of all these devices efficiently requires very specific knowledge about them, such as their hardware architectures and specific programming languages as well as details about the system¿s low level communication protocols. To address these issues, this paper describes and analyses the Plug‐and‐Play architecture. This is one of the most interesting service‐oriented architectures (SOAs) available, which exhibits characteristics that are well adapted to industrial robotics cells. To validate their programming features and applicability, a test bed was specially designed. This provides a new graphical service orchestration which was implemented using Workflow Foundation 4 of .NET. The obtained results allowed us to verify that the use of integration schemes based on SOAs reduces the system integration time and is better adapted to industrial robotic cell system integrators.The authors wish to express their gratitude to the Plan Nacional de I+D (FEDER-CICYT, Spanish Government) and to the Universitat Politecnica de Valencia (Spain) for the financing of this work, which was made under the research projects DPI2010-20814-C02-02, DPI2011-28507-C02-01 and PAID/2011/039. In addition, they also want to acknowledge the assistance of Elena Ruiz Gomez for her help in the translation of the article.Valera Fernández, Á.; Gómez Moreno, J.; Sánchez Salmerón, AJ.; Ricolfe Viala, C.; Zotovic Stanisic, R.; Vallés Miquel, M. (2012). Industrial Robot Programming and UPnP Services Orchestration for the Automation of Factories. International Journal of Advanced Robotic Systems. 9:1-11. doi:10.5772/51373S1119Ahn, S., Lee, J., Lim, K., Ko, H., Kwon, Y., & Kim, H. (2006). UPnP SDK for Robot Development. 2006 SICE-ICASE International Joint Conference. doi:10.1109/sice.2006.315791Ahn, S., Lee, J., Lim, K., Ko, H., Kwon, Y., & Kim, H. (2006). Requirements to UPnP for Robot Middleware. 2006 IEEE/RSJ International Conference on Intelligent Robots and Systems. doi:10.1109/iros.2006.282262Kelleher, C., & Pausch, R. (2005). Lowering the barriers to programming. ACM Computing Surveys, 37(2), 83-137. doi:10.1145/1089733.1089734Candido, G., Colombo, A. W., Barata, J., & Jammes, F. (2011). Service-Oriented Infrastructure to Support the Deployment of Evolvable Production Systems. IEEE Transactions on Industrial Informatics, 7(4), 759-767. doi:10.1109/tii.2011.2166779Crnkovic, I., Stafford, J., & Szyperski, C. (2011). Software Components beyond Programming: From Routines to Services. IEEE Software, 28(3), 22-26. doi:10.1109/ms.2011.62Cucinotta, T., Mancina, A., Anastasi, G. F., Lipari, G., Mangeruca, L., Checcozzo, R., & Rusina, F. (2009). A Real-Time Service-Oriented Architecture for Industrial Automation. IEEE Transactions on Industrial Informatics, 5(3), 267-277. doi:10.1109/tii.2009.2027013Delamer, I. M., & Lastra, J. L. M. (2006). Service-Oriented Architecture for Distributed Publish/Subscribe Middleware in Electronics Production. IEEE Transactions on Industrial Informatics, 2(4), 281-294. doi:10.1109/tii.2006.885188Estevez-Ayres, I., Basanta-Val, P., Garcia-Valls, M., Fisteus, J. A., & Almeida, L. (2009). QoS-Aware Real-Time Composition Algorithms for Service-Based Applications. IEEE Transactions on Industrial Informatics, 5(3), 278-288. doi:10.1109/tii.2009.2026422Foster, H., Uchitel, S., Magee, J., & Kramer, J. (2010). An Integrated Workbench for Model-Based Engineering of Service Compositions. IEEE Transactions on Services Computing, 3(2), 131-144. doi:10.1109/tsc.2010.19Chen, H.-M., Kazman, R., & Perry, O. (2010). From Software Architecture Analysis to Service Engineering: An Empirical Study of Methodology Development for Enterprise SOA Implementation. IEEE Transactions on Services Computing, 3(2), 145-160. doi:10.1109/tsc.2010.21Jaejoon Lee, & Kotonya, G. (2010). Combining Service-Orientation with Product Line Engineering. IEEE Software, 27(3), 35-41. doi:10.1109/ms.2010.30Jammes, F., & Smit, H. (2005). Service-Oriented Paradigms in Industrial Automation. IEEE Transactions on Industrial Informatics, 1(1), 62-70. doi:10.1109/tii.2005.844419Juric, M. B., Kezmah, B., Hericko, M., Rozman, I., & Vezocnik, I. (2004). Java RMI, RMI tunneling and Web services comparison and performance analysis. ACM SIGPLAN Notices, 39(5), 58. doi:10.1145/997140.997146Lewis, G., Morris, E., Simanta, S., & Smith, D. (2011). Service Orientation and Systems of Systems. IEEE Software, 28(1), 58-63. doi:10.1109/ms.2011.15Martin M., Grounds N.G., Antonio J.K., Crawford K. and Madden J. (2010). “Banker's Deadlock Avoidance Algorithm for Distributed Service-Oriented Architectures”, PDPTACSREA Press, pp. 43–50.Menasce, D., Gomaa, H., Malek, S., & Sousa, J. (2011). SASSY: A Framework for Self-Architecting Service-Oriented Systems. IEEE Software, 28(6), 78-85. doi:10.1109/ms.2011.22Remy, S. L., & Blake, M. B. (2011). Distributed Service-Oriented Robotics. IEEE Internet Computing, 15(2), 70-74. doi:10.1109/mic.2011.38Sasa, A., Juric, M. B., & Krisper, M. (2008). Service-Oriented Framework for Human Task Support and Automation. IEEE Transactions on Industrial Informatics, 4(4), 292-302. doi:10.1109/tii.2008.2008641Unver, H. O. (2011). System Architectures Enabling Reconfigurable Laboratory-Automation Systems. IEEE Transactions on Systems, Man, and Cybernetics, Part C (Applications and Reviews), 41(6), 909-922. doi:10.1109/tsmcc.2011.2107552Veiga, G., Pires, J. N., & Nilsson, K. (2009). Experiments with service-oriented architectures for industrial robotic cells programming. Robotics and Computer-Integrated Manufacturing, 25(4-5), 746-755. doi:10.1016/j.rcim.2008.09.001Veiga, G., Pires, J. N., & Nilsson, K. (2007). ON THE USE OF SERVICE ORIENTED SOFTWARE PLATFORMS FOR INDUSTRIAL ROBOTIC CELLS. IFAC Proceedings Volumes, 40(3), 109-115. doi:10.3182/20070523-3-es-4908.00019WHITLEY, K. N. (1997). Visual Programming Languages and the Empirical Evidence For and Against. Journal of Visual Languages & Computing, 8(1), 109-142. doi:10.1006/jvlc.1996.0030Xu, L. D. (2011). Enterprise Systems: State-of-the-Art and Future Trends. IEEE Transactions on Industrial Informatics, 7(4), 630-640. doi:10.1109/tii.2011.216715

Filtering and Tracking with Trinion-Valued Adaptive Algorithms

A new model for three-dimensional processes based on the trinion algebra is introduced for the first time. Compared with the pure quaternion model, the trinion model is more compact and computationally more efficient, while having similar or comparable performance in terms of adaptive linear filtering. Moreover, the trinion model can effectively represent the general relationship of state evolution in Kalman filtering, where the pure quaternion model fails. Simulations on real-world wind recordings and synthetic data sets are provided to demonstrate the potentials of this new modeling method

Black Hole Spin via Continuum Fitting and the Role of Spin in Powering Transient Jets

The spins of ten stellar black holes have been measured using the continuum-fitting method. These black holes are located in two distinct classes of X-ray binary systems, one that is persistently X-ray bright and another that is transient. Both the persistent and transient black holes remain for long periods in a state where their spectra are dominated by a thermal accretion disk component. The spin of a black hole of known mass and distance can be measured by fitting this thermal continuum spectrum to the thin-disk model of Novikov and Thorne; the key fit parameter is the radius of the inner edge of the black hole's accretion disk. Strong observational and theoretical evidence links the inner-disk radius to the radius of the innermost stable circular orbit, which is trivially related to the dimensionless spin parameter a_* of the black hole (|a_*| < 1). The ten spins that have so far been measured by this continuum-fitting method range widely from a_* \approx 0 to a_* > 0.95. The robustness of the method is demonstrated by the dozens or hundreds of independent and consistent measurements of spin that have been obtained for several black holes, and through careful consideration of many sources of systematic error. Among the results discussed is a dichotomy between the transient and persistent black holes; the latter have higher spins and larger masses. Also discussed is recently discovered evidence in the transient sources for a correlation between the power of ballistic jets and black hole spin.Comment: 30 pages. Accepted for publication in Space Science Reviews. Also to appear in hard cover in the Space Sciences Series of ISSI "The Physics of Accretion onto Black Holes" (Springer Publisher). Changes to Sections 5.2, 6.1 and 7.4. Section 7.4 responds to Russell et al. 2013 (MNRAS, 431, 405) who find no evidence for a correlation between the power of ballistic jets and black hole spi

D-concurrence bounds for pair coherent states

The pair coherent state is a state of a two-mode radiation field which is known as a state with non-Gaussian wave function. In this paper, the upper and lower bounds for D-concurrence (a new entanglement measure) have been studied over this state and calculated.Comment: 11 page