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Journal articles on the topic 'Inverted oscillator'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Yuce, C., A. Kilic, and A. Coruh. "Inverted oscillator." Physica Scripta 74, no. 1 (2006): 114–16. http://dx.doi.org/10.1088/0031-8949/74/1/014.

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2

Golovinski, P. A. "Dynamics of driven Brownian inverted oscillator." Physics Letters A 384, no. 10 (2020): 126203. http://dx.doi.org/10.1016/j.physleta.2019.126203.

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3

BISHOP, S. R., and D. J. SUDOR. "THE "NOT QUITE" INVERTED PENDULUM." International Journal of Bifurcation and Chaos 09, no. 01 (1999): 273–85. http://dx.doi.org/10.1142/s0218127499000158.

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The planar pendulum has been used as an example of a simple oscillator for over 300 years with notable historical contributions by Galileo and Huygens. Initially interest was focused on small displacements from the stable hanging position specifically to determine the period of oscillation. More recently attention has switched to larger amplitude and chaotic motions as a consequence of periodic forcing to the pivot point. To explain experimentally observed behavior, we investigate here the existence of stable inverted solutions of a pendulum sinusoidally driven, in the first instance by a pure

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4

Pedrosa, I. A., Alberes Lopes de Lima, and Alexandre M. de M. Carvalho. "Gaussian wave packet states of a generalized inverted harmonic oscillator with time-dependent mass and frequency." Canadian Journal of Physics 93, no. 8 (2015): 841–45. http://dx.doi.org/10.1139/cjp-2014-0553.

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We derive quantum solutions of a generalized inverted or repulsive harmonic oscillator with arbitrary time-dependent mass and frequency using the quantum invariant method and linear invariants, and write its wave functions in terms of solutions of a second-order ordinary differential equation that describes the amplitude of the damped classical inverted oscillator. Afterwards, we construct Gaussian wave packet solutions and calculate the fluctuations in coordinate and momentum, the associated uncertainty relation, and the quantum correlations between coordinate and momentum. As a particular ca

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5

PEDROSA, I. A., and I. GUEDES. "WAVE FUNCTION OF THE TIME-DEPENDENT INVERTED HARMONIC OSCILLATOR." Modern Physics Letters B 16, no. 17 (2002): 637–43. http://dx.doi.org/10.1142/s0217984902004147.

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Time-dependent mass and frequency inverted harmonic oscillator is discussed in light of the Lewis and Reisenfeld invariant method. The wave function is found in terms of the Weber function. As an example, we derive the wave function of the inverted Caldirola-Kanai oscillator.

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6

Maamache, Mustapha, and Jeong Ryeol Choi. "Quantum-classical correspondence for the inverted oscillator." Chinese Physics C 41, no. 11 (2017): 113106. http://dx.doi.org/10.1088/1674-1137/41/11/113106.

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7

Tarzi, S. "The inverted harmonic oscillator: some statistical properties." Journal of Physics A: Mathematical and General 21, no. 14 (1988): 3105–11. http://dx.doi.org/10.1088/0305-4470/21/14/011.

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8

Barton, G. "Quantum mechanics of the inverted oscillator potential." Annals of Physics 166, no. 2 (1986): 322–63. http://dx.doi.org/10.1016/0003-4916(86)90142-9.

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9

PEDROSA, I. A., and I. GUEDES. "QUANTUM STATES OF A GENERALIZED TIME-DEPENDENT INVERTED HARMONIC OSCILLATOR." International Journal of Modern Physics B 18, no. 09 (2004): 1379–85. http://dx.doi.org/10.1142/s0217979204024732.

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We discuss the extension of the Lewis and Riesenfeld method of solving the time-dependent Schrödinger equation to cases where the invariant has continuous eigenvalues and apply it to the case of a generalized time-dependent inverted harmonic oscillator. As a special case, we consider a generalized inverted oscillator with constant frequency and exponentially increasing mass.

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10

Dash, Sandeep, Satya Mishra, and Nirmal Rout. "Design of efficient delay block for low frequency application." Facta universitatis - series: Electronics and Energetics 33, no. 3 (2020): 489–98. http://dx.doi.org/10.2298/fuee2003489d.

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In recent years researchers have been focusing on the design of low power and small size oscillator for emerging areas of interest such as the internet of things (IoT) and biomedical applications. In this paper a new delay block for ring oscillator is proposed using CMOS inverter cascaded with inverted current starved inverter (CICSI). The designed delay block provides approximately 50% more delay with a smaller number of transistors than the conventionally designed circuits. Furthermore, a ring oscillator and a non-overlapping clock (NOC) generator are designed using it. The designed circuits

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11

Baskoutas, S., A. Jannussis, and R. Mignani. "Dissipative tunnelling of the inverted Caldirola-Kanai oscillator." Journal of Physics A: Mathematical and General 27, no. 6 (1994): 2189–96. http://dx.doi.org/10.1088/0305-4470/27/6/039.

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12

Baskoutas, S., and A. Jannussis. "Quantum mechanics of the inverted Caldirola-Kanai oscillator." Il Nuovo Cimento B 107, no. 3 (1992): 255–67. http://dx.doi.org/10.1007/bf02728488.

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13

Jaroonchokanan, Nawee, and Sujin Suwanna. "Inverted anhamonic oscillator model for distribution of financial returns." Journal of Physics: Conference Series 1144 (December 2018): 012101. http://dx.doi.org/10.1088/1742-6596/1144/1/012101.

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14

Guo, Guang-Jie, Zhong-Zhou Ren, Guo-Xing Ju, and Xiao-Yong Guo. "Quantum tunneling effect of a driven inverted harmonic oscillator." Journal of Physics A: Mathematical and Theoretical 44, no. 30 (2011): 305301. http://dx.doi.org/10.1088/1751-8113/44/30/305301.

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15

Bermudez, David, and David J. Fernández C. "Factorization method and new potentials from the inverted oscillator." Annals of Physics 333 (June 2013): 290–306. http://dx.doi.org/10.1016/j.aop.2013.02.015.

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16

Bhaduri, R. K., Avinash Khare, S. M. Reimann, and E. L. Tomusiak. "The Riemann Zeta Function and the Inverted Harmonic Oscillator." Annals of Physics 254, no. 1 (1997): 25–40. http://dx.doi.org/10.1006/aphy.1996.5636.

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17

Baskoutas, S., A. Jannussis, and R. Mignani. "Quantum tunnelling of a damped and driven, inverted harmonic oscillator." Journal of Physics A: Mathematical and General 26, no. 23 (1993): 7137–47. http://dx.doi.org/10.1088/0305-4470/26/23/048.

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18

Kim, D. H., D. Udaiyan, R. P. M. Green, G. J. Crofts, and M. J. Damzen. "Self-starting vector phase conjugate laser oscillator in inverted Nd:YAG." Journal of the Optical Society of Korea 1, no. 1 (1997): 41–43. http://dx.doi.org/10.3807/josk.1997.1.1.041.

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19

Guo, Guang-Jie, Zhong-Zhou Ren, Guo-Xing Ju, and Xiao-Yong Guo. "Quantum tunneling effect of a time-dependent inverted harmonic oscillator." Journal of Physics A: Mathematical and Theoretical 44, no. 18 (2011): 185301. http://dx.doi.org/10.1088/1751-8113/44/18/185301.

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20

Baskoutas, S., A. Jannussis, R. Mignani, and V. Papatheou. "Tunnelling process for non-Hermitian systems: the complex-frequency inverted oscillator." Journal of Physics A: Mathematical and General 26, no. 17 (1993): L819—L824. http://dx.doi.org/10.1088/0305-4470/26/17/012.

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21

Bhaduri, R. K., Avinash Khare та J. Law. "Phase of the Riemann ζ function and the inverted harmonic oscillator". Physical Review E 52, № 1 (1995): 486–91. http://dx.doi.org/10.1103/physreve.52.486.

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22

Finster, Felix, and José M. Isidro. "Lp-spectrum of the Schrödinger operator with inverted harmonic oscillator potential." Journal of Mathematical Physics 58, no. 9 (2017): 092104. http://dx.doi.org/10.1063/1.4997418.

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23

McClellan, A. D., and W. Jang. "Mechanosensory inputs to the central pattern generators for locomotion in the lamprey spinal cord: resetting, entrainment, and computer modeling." Journal of Neurophysiology 71, no. 6 (1994): 1. http://dx.doi.org/10.1152/jn.1994.71.6.1-a.

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Pages 2442–2454: A. D. McClellan and W. Jang, “Mechanosensory inputs to the central pattern generators for locomotion in the lamprey spinal cord: resetting, entrainment, and computer modeling.” The oscillator PRCs (Fig. 2 B) used in the computer simulations (Figs. 10—14) were inverted which was implemented by making the PRC scalars negative See PDF for Equation Thus synaptic inputs to an oscillator that produce phase delay (phase advance), which is represented by positive (negative) values in the PRCs in Fig. 2 B, will contribute a negative (positive) phase shift to the expression for oscillat

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24

Mota, R. D., D. Ojeda-Guillén, M. Salazar-Ramírez, and V. D. Granados. "Non-Hermitian inverted harmonic oscillator-type Hamiltonians generated from supersymmetry with reflections." Modern Physics Letters A 34, no. 04 (2019): 1950028. http://dx.doi.org/10.1142/s0217732319500287.

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By modifying and generalizing known supersymmetric models, we are able to find four different sets of one-dimensional Hamiltonians for the inverted harmonic oscillator. The first set of Hamiltonians is derived by extending the supersymmetric quantum mechanics with reflections to non-Hermitian supercharges. The second set is obtained by generalizing the supersymmetric quantum mechanics valid for non-Hermitian supercharges with the Dunkl derivative instead of [Formula: see text]. Also, by changing the derivative [Formula: see text] by the Dunkl derivative in the creation and annihilation-type op

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25

Coullet, P., J. M. Gilli, and G. Rousseaux. "On the critical equilibrium of the spiral spring pendulum." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 466, no. 2114 (2009): 407–21. http://dx.doi.org/10.1098/rspa.2009.0393.

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Physical systems such as an inverted pendulum driven by a spiral spring, an unbalanced Euler elastica with a travelling mass, a heavy body with a parabolic section and an Ising ferromagnet are very different. However, they all behave in the same manner close to the critical regime for which nonlinearities are prominent. We demonstrate experimentally, for the first time, an old prediction by Joseph Larmor, which states that a nonlinear oscillator close to its supercritical bifurcation oscillates with a period inversely proportional to its angular amplitude. We perform our experiments with a Hol

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26

Chistyakov, V. V. "Quantum Analogue of Unstable Limit Cycles of a Periodically Perturbed Inverted Oscillator." Theoretical and Mathematical Physics 198, no. 1 (2019): 17–28. http://dx.doi.org/10.1134/s0040577919010021.

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27

Rodgers, J., H. Guo, V. L. Granatstein, et al. "High efficiency, phase-locked operation of the harmonic-multiplying inverted gyrotwystron oscillator." IEEE Transactions on Plasma Science 27, no. 2 (1999): 412–21. http://dx.doi.org/10.1109/27.772268.

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28

Kinoshita, H., T. Ishida, M. Akiyama, et al. "New insulated-gate inverted structure AlGaAs/GaAs/n-AlGaAs HEMT ring oscillator." Electronics Letters 21, no. 23 (1985): 1062. http://dx.doi.org/10.1049/el:19850753.

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29

Guo, Guang-Jie, Zhong-Zhou Ren, Guo-Xing Ju, and Chao-Yun Long. "The sojourn time of the inverted harmonic oscillator on the noncommutative plane." Journal of Physics A: Mathematical and Theoretical 44, no. 42 (2011): 425301. http://dx.doi.org/10.1088/1751-8113/44/42/425301.

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30

Guo, Guang-Jie, Zhong-Zhou Ren, Guo-Xing Ju, and Xiao-Yong Guo. "Time evolution of a time-dependent inverted harmonic oscillator in arbitrary dimensions." Journal of Physics A: Mathematical and Theoretical 45, no. 11 (2012): 115301. http://dx.doi.org/10.1088/1751-8113/45/11/115301.

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31

Choi, Jeong Ryeol, and Kyu Hwang Yeon. "Coherent states of the inverted Caldirola–Kanai oscillator with time-dependent singularities." Annals of Physics 323, no. 4 (2008): 812–26. http://dx.doi.org/10.1016/j.aop.2007.07.004.

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32

Sargsyan, V. V., Z. Kanokov, G. G. Adamyan, and N. V. Antonenko. "Quantum non-Markovian Langevin equations and transport coefficients for an inverted oscillator." Theoretical and Mathematical Physics 156, no. 3 (2008): 1331–46. http://dx.doi.org/10.1007/s11232-008-0110-z.

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33

I'msaddak, Lobna, Dalenda Ben Issa, Abdennaceur Kachouri, Mounir Samet, and Hekmet Samet. "Infrared Oscillators in Conventional Carbon Nanotube FET Technology." Journal of Circuits, Systems and Computers 24, no. 04 (2015): 1550053. http://dx.doi.org/10.1142/s021812661550053x.

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This paper presents the design of C-CNTFET oscillator's arrays for infrared 'IR' technology. These arrays are contained by both of the LC-tank and the voltage control 'coupled N- and P-type C-CNTFET LC-tank' oscillators. In this paper, the analysis of the impact of CNT diameter variations and the nonlinear capacitances (C GD and C GS ) were introduced, especially on propagation time, oscillation frequency and power consumption. The C-CNTFET inverter, ring oscillator, LC-tank and coupled N- and P-type C-CNTFET LC-tank oscillator structures were designed and their speeding and performances have

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34

Combescure, Monique, and Alain Combescure. "Quantum and classical fidelity for singular perturbations of the inverted and harmonic oscillator." Journal of Mathematical Analysis and Applications 326, no. 2 (2007): 908–28. http://dx.doi.org/10.1016/j.jmaa.2006.03.044.

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35

Aguirre-Ollinger, Gabriel. "Globally stable control of a dynamic bipedal walker using adaptive frequency oscillators." Robotica 32, no. 7 (2014): 1039–63. http://dx.doi.org/10.1017/s0263574713001227.

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SUMMARYWe present a control method for a simple limit-cycle bipedal walker that uses adaptive frequency oscillators (AFOs) to generate stable gaits. Existence of stable limit cycles is demonstrated with an inverted-pendulum model. This model predicts a proportional relationship between hip torque amplitude and stride frequency. The closed-loop walking control incorporates adaptive Fourier analysis to generate a uniform oscillator phase. Gait solutions (fixed points) are predicted via linearization of the walker model, and employed as initial conditions to generate exact solutions via simulatio

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36

ANGELOPOULOU, P., S. BASKOUTAS, A. JANNUSSIS, R. MIGNANI, and V. PAPATHEOU. "NON-HERMITIAN TUNNELING OF OPEN QUANTUM SYSTEMS." International Journal of Modern Physics B 09, no. 17 (1995): 2083–104. http://dx.doi.org/10.1142/s0217979295000823.

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We discuss some aspects of the time picture of tunneling for open quantum systems described by non-Hermitian (NH) Hamiltonians. The concept of sojourn time for such systems is introduced in the framework of the biorthonormal formalism. Due to the various definitions of probability density in the non-Hermitian case, we get three different sojourn times, two real and one complex. We consider as model of a dissipative NH system the complex, generalized parametric oscillator, for which we derive the exact expressions of the three sojourn times in terms of the Wei-Norman characteristic functions en

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37

Bhattacharya, Samyadeb, and Sisir Roy. "Dissipative Effect and Tunneling Time." Advances in Mathematical Physics 2011 (2011): 1–13. http://dx.doi.org/10.1155/2011/138358.

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The quantum Langevin equation has been studied for dissipative system using the approach of Ford et al. Here, we have considered the inverted harmonic oscillator potential and calculated the effect of dissipation on tunneling time, group delay, and the self-interference term. A critical value of the friction coefficient has been determined for which the self-interference term vanishes. This approach sheds new light on understanding the ion transport at nanoscale.

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38

Preston, Daniel J., Haihui Joy Jiang, Vanessa Sanchez, et al. "A soft ring oscillator." Science Robotics 4, no. 31 (2019): eaaw5496. http://dx.doi.org/10.1126/scirobotics.aaw5496.

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Periodic actuation of multiple soft, pneumatic actuators requires coordinated function of multiple, separate components. This work demonstrates a soft, pneumatic ring oscillator that induces temporally coordinated periodic motion in soft actuators using a single, constant-pressure source, without hard valves or electronic controls. The fundamental unit of this ring oscillator is a soft, pneumatic inverter (an inverting Schmitt trigger) that switches between its two states (“on” and “off”) using two instabilities in elastomeric structures: buckling of internal tubing and snap-through of a hemis

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39

Abdelmonem, Mohamed S., Afaf Abdel-Hady, and Ibraheem Nasser. "Dealing with the shifted and inverted Tietz-Hua oscillator potential using the J-matrix method." International Journal of Quantum Chemistry 116, no. 12 (2015): 897–907. http://dx.doi.org/10.1002/qua.24968.

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40

Kinoshita, H., Y. Sano, S. Nishi, T. Ishida, M. Akiyama, and K. Kaminishi. "IIA-6 high-performance AlGaAs/GaAs/N-AlGaAs insulated-gate inverted-structure HEMT ring-oscillator." IEEE Transactions on Electron Devices 32, no. 11 (1985): 2529–30. http://dx.doi.org/10.1109/t-ed.1985.22313.

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41

Sharp, A. A., F. K. Skinner, and E. Marder. "Mechanisms of oscillation in dynamic clamp constructed two-cell half-center circuits." Journal of Neurophysiology 76, no. 2 (1996): 867–83. http://dx.doi.org/10.1152/jn.1996.76.2.867.

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1. The dynamic clamp was used to create reciprocally inhibitory two-cell circuits from pairs of pharmacologically isolated gastric mill neurons of the stomatogastric ganglion of the crab, Cancer borealis. 2. We used this system to study how systematic alterations in intrinsic and synaptic parameters affected the network behavior. This has previously only been possible in purely computational systems. 3. In the absence of additional hyperpolarization-activated inward current (IH), stable half-center oscillatory behavior was not observed. In the presence of additional IH, a variety of circuit dy

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42

Bhattacharyya, Arpan. "Circuit complexity and (some of) its applications." International Journal of Modern Physics E 30, no. 07 (2021): 2130005. http://dx.doi.org/10.1142/s0218301321300058.

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Motivated by recent interesting holographic results, several attempts have been made to study complexity (rather “Circuit Complexity”) for quantum field theories using Nielsen’s geometric method. Since then, it has found many interesting applications. We discuss some of its applications. In particular, we discuss whether circuit complexity can be used as a diagnostics of quantum chaos. We use a simple toy model, namely the Inverted Harmonic Oscillator (IHO), to establish our claim and discuss further applications in the context of quantum cosmology.

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43

Li, Z. Y., P. B. Bing, S. Yuan, D. G. Xu, and J. Q. Yao. "Investigation on terahertz parametric oscillators using quasi-phase-matching GaP crystal." Modern Physics Letters B 29, no. 01 (2015): 1450258. http://dx.doi.org/10.1142/s0217984914502583.

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Terahertz parametric oscillator (TPO) using periodically inverted GaP stacks (PIGaPS) as gain medium with a quasi-phase-matching scheme is investigated. The frequency tuning characteristics of terahertz wave (THz-wave) are analyzed by varying the grating period of PIGaPS and the pump wavelength. Gain and absorption characteristics of THz-wave are also investigated. The characteristics of PIGaPS and periodically poled LiNbO 3 (PPLN) are compared when the two crystals used as gain medium for TPO. The analyses indicate that PIGaPS is more suitable than PPLN are used as the gain medium for TPO.

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44

Maamache, Mustapha, Yacine Bouguerra, and Jeong Ryeol Choi. "Time behavior of a Gaussian wave packet accompanying the generalized coherent state for the inverted oscillator." Progress of Theoretical and Experimental Physics 2016, no. 6 (2016): 063A01. http://dx.doi.org/10.1093/ptep/ptw057.

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45

Rahimi A. Subki, A. Shamsul, Mohd Zaidi Mohd Tumari, Wan Norhisyam Abd Rashid, Aiman Zakwan Jidin, and Ahmad Nizammuddin Muhammad Mustafa. "Hardware implementation of single phase three-level cascaded h-bridge multilevel inverter using sinusoidal pulse width modulation." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 2 (2019): 625. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp625-635.

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<span lang="EN-US">In this paper a hardware implementation of single-phase cascaded H-bridge three level multilevel inverter (MLI) using sinusoidal pulse width modulation (SPWM) is presented. There are a few interesting features of using this configuration, where less component count, less switching losses, and improved output voltage/current waveform. The output of power inverter consists of three form, that is, square wave, modified square wave and pure sine wave. The pure sine wave and modified square wave are more expensive than square wave. The focus paper is to generate a PWM signa

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46

Chistyakov, V. V. "On the Evolution of Converging Wave Packet of an Inverted Quantum Oscillator Driven by Homogeneous Harmonic Field." RUDN JOURNAL OF MATHEMATICS, INFORMATION SCIENCES AND PHYSICS 25, no. 3 (2017): 283–94. http://dx.doi.org/10.22363/2312-9735-2017-25-3-283-294.

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47

Kinoshita, Haruhisa, Seiji Nishi, Masahiro Akiyama, and Katsuzo Kaminishi. "High-Speed Low-Power Ring Oscillator Using Inverted-Structure Modulation-Doped GaAs/n-AlGaAs Field-Effect Transistors." Japanese Journal of Applied Physics 24, Part 1, No. 8 (1985): 1061–64. http://dx.doi.org/10.1143/jjap.24.1061.

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48

Parsons, Sean P., and Jan D. Huizinga. "Effects of gap junction inhibition on contraction waves in the murine small intestine in relation to coupled oscillator theory." American Journal of Physiology-Gastrointestinal and Liver Physiology 308, no. 4 (2015): G287—G297. http://dx.doi.org/10.1152/ajpgi.00338.2014.

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Waves of contraction in the small intestine correlate with slow waves generated by the myenteric network of interstitial cells of Cajal. Coupled oscillator theory has been used to explain steplike gradients in the frequency (frequency plateaux) of contraction waves along the length of the small intestine. Inhibition of gap junction coupling between oscillators should lead to predictable effects on these plateaux and the wave dislocation (wave drop) phenomena associated with their boundaries. It is these predictions that we wished to test. We used a novel multicamera diameter-mapping system to

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49

Chigarev, S. G., E. M. Epshtein, Y. V. Gulyaev, et al. "Spin-Injection Terahertz Radiation in Magnetic Junctions." Solid State Phenomena 190 (June 2012): 153–56. http://dx.doi.org/10.4028/www.scientific.net/ssp.190.153.

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Electromagnetic radiation of 1 - 10 THz range is observed at room temperature in a structure with a point contact between a ferromagnetic rod and a thin ferromagnetic film under electric current of high enough density. The radiation is due to nonequilibrium spin injection between the components of the structure. By estimates, the injection can lead to inverted population of the spin subbands. The radiation power exceeds by orders of magnitude the thermal background (with the Joule heating taking into account) and follows the current without inertia. Efficiency of the oscillator depends strongl

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50

Ma, Chen-Te. "Accurate study from adaptive perturbation method." International Journal of Modern Physics A 36, no. 04 (2021): 2150029. http://dx.doi.org/10.1142/s0217751x21500299.

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The adaptive perturbation method decomposes a Hamiltonian by the diagonal elements and nondiagonal elements of the Fock state. The diagonal elements of the Fock state are solvable but can contain the information about coupling constants. We study the harmonic oscillator with the interacting potential, [Formula: see text], where [Formula: see text] and [Formula: see text] are coupling constants, and [Formula: see text] is the position operator. In this study, each perturbed term has an exact solution. We demonstrate the accurate study of the spectrum and [Formula: see text] up to the next leadi

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