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- Reproduction of the Lorenz signal with an
**oscillator**trained by cross-validation. ... Reconstructed voiced part of the voiced fricative /zh/ by combining linear prediction and the**oscillator**model. ... Reconstruction of the Lorenz system by the**oscillator**model with Bayesian training using embedding dimension N=5. ... Nonlinear predictor (a) and**oscillator**model (b). ... Phase space embeddings of the output of the original Lorenz system (top), the training signals (middle row), and the output of the**oscillator**model (bottom row). The embedding dimension used for the**oscillator**is N=3, the RBF network comprises 64 centers. ...**Oscillator**model... Institute of Communications and Radio-**Frequency**Engineering, Vienna University of Technology, Vienna 1040, AustriaData Types:- Image
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- (Color online) |A|2 is the probability of finding the spin system in the state |⇓↓〉. It
**oscillates**at the high**frequency**D (=2.88GHz). The**frequency**of the beats is χ/2 (=16.7MHz). The amplitude of**oscillations**is also modulated by an additional cosine wave signal of**frequency**χ (see text). |C|2 is the probability of finding the spin system in the state |0↓〉. It**oscillates**at the low**frequency**χ. It is almost zero in the time interval 90–100ns. The probability of finding spin system in the state |⇑↓〉, |B|2, has the same**oscillations**than |A|2 but it is anti-phase (see Fig. 3). ... Ideal truth table and schematic representation of a two-**qubit**CNOT gate irradiated by a sequence of two microwave π/2-pulses of equal width t and a variable waiting time between pulses τ. In the text, x and y are the states of two impurity spins of diamond, namely the spin-12 carried by the P1 center and the spin-1 carried by the NV−1 color center. The symbol ⊕ is the addition modulo 2, or equivalently the XOR operation. ... (Color online) NV−1 Rabi**oscillations**. Control**qubit**down: blue, red and green lines correspond, respectively, to the time evolution of |A|2, |B|2 and |C|2, i.e., the probabilities of finding the spin system in the state |⇓↓〉, |⇑↓〉 and |0↓〉. Control**qubit**up: red, blue and green lines represent, respectively, |A′|2, |B′|2 and |C′|2, i.e., the probabilities of finding the spin system in the state |⇓↑〉, |⇑↑〉 and |0↑〉, i.e., |A′|2=|B|2, |B′|2=|A|2 and |C′|2=|C|2 (see text). Fig. 4 gives details in the interval 60–120ns. They can also be revealed by a zoom in.Data Types:- Image
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- Silicon beam: (a) instantaneous
**frequency**; (b) instantaneous damping; (c) equivalent modal**frequency**; (d) equivalent modal damping. _______ primary vacuum; - - - - pressure ∼300 mbar; . . . . . pressure ∼600mbar; – · – · – atmospheric pressure. ... Quartz beam: (a) equivalent modal**frequency**; (b) equivalent modal damping. _______ primary vacuum; - - - - pressure ∼300mbar; . . . . . pressure ∼600mbar; – · – · – atmospheric pressure. ... (a) Identified modal**frequency**: quartz structure; (b) identified modal**frequency**: lithium niobate structure; (c) identified modal damping: quartz structure; (d) identified modal damping: lithium niobate structure; symbols: experimental values; lines: polynomial fitting. and _______ primary vacuum; ● and - - - - pressure ∼300 mbar; ▴ and . . . . . pressure ∼600mbar; ■ and – · – · – atmospheric pressure. ... Department of Physics and Metrology of**Oscillator**, FEMTO-ST Institute, 32 Avenue de l’Observatoire, 25044 Besançon, France... (a) Instantaneous**frequency**; (b) instantaneous damping; (c) equivalent modal**frequency**; (d) equivalent modal damping. _______ 0.2ms−1; - - - - 0.15ms−1; . . . . . 0.10ms−1. ... Lithium niobate beam: (a) equivalent modal**frequency**; (b) equivalent modal damping. _______ primary vacuum; - - - - pressure ∼300mbar; . . . . . pressure ∼600mbar; – · – · – atmospheric pressure.Data Types:- Image
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- Illustration of a linear ion trap including an axial magnetic field gradient. The static field makes individual ions distinguishable in
**frequency**space by Zeeman-shifting their internal energy levels (solid horizontal lines represent**qubit**states). In addition, it mediates the coupling between internal and external degrees of freedom when a driving field is applied (dashed horizontal lines stand for vibrational energy levels of the ion string, see text). ... Rabi**oscillations**on the optical E2 transition S1/2-D5/2 in Ba + . A fit of the data (solid line) yields a Rabi**frequency**of 71.4 × 2πkHz and a transversal relaxation time of 100 μs (determined by the coherence time of the ir light used to drive the E2 resonance). ... Illustration of the coupled system ‘**qubit**⊗ harmonic**oscillator**’ in a trap with magnetic field gradient. Internal**qubit**transitions lead to a displacement dz of the ion from its initial equilibrium position and consequently to the excitation of vibrational motion. In the formal description the usual Lamb–Dicke parameter is replaced by a new effective one (see text). ... (a) Relevant energy levels and transitions in 138Ba + . (b) Schematic drawing of major experimental elements. OPO: Optical parametric**oscillator**; YAG: Nd:YAG laser; LD: laser diode; DSP: Digital signal processing system allows for real time control of experimental parameters; AOM: Acousto-optic modulators used as optical switches and for tuning of laser light; PM: Photo multiplier tube, serves for detection of resonance fluorescence. All lasers are**frequency**and intensity stabilized (not shown). ... Schematic drawing of the resonances of**qubits**j and j + 1 with some accompanying sideband resonances. The angular**frequency**vN corresponds to the Nth axial vibrational mode, and the**frequency**separation between carrier resonances is denoted by δω.Data Types:- Image
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- Voltage controlled
**oscillator**... Microwave Communication and Radio**Frequency**Integrated Circuit Lab, Department and Institute of Electronic Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou 64002, Yunlin, Taiwan, ROC... Output**oscillation****frequency**versus control voltage of (a) chip1 VCO. (b) chip2 VCO.Data Types:- Image
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**Qubits**in solids... Schematic diagram of**qubits**addressed in a**frequency**domain. The ions whose 3H4(1)± 3 2–1D2(1) transitions are resonant with a common cavity mode are employed as**qubits**. ... Basic scheme of the concept of the**frequency**-domain quantum computer. The atoms are coupled to a single cavity mode. Lasers with**frequencies**of νk and νl are directed onto the set of atoms and interact with the kth and lth atoms selectively.Data Types:- Image
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- Detection and manipulation of the
**qubit**. (a) Fluorescence image of nanodiamond prepared on the CPW transmission line. NV S1 is circled. The inset is a photo of CPW with 20μm gaps fabricated on a silica glass. (b) CW ODMR spectrum for NV S1. The inset is energy levels of NV center. A 532nm laser is used to excite and initialize the NV center. Fluorescence is collected by a confocal microscope. (c) Rabi**oscillation**of NV S1. Rabi**oscillation**period is about 62ns. (d) Hahn echo and CPMG control pulse sequences. πx (πy) implies the direction of microwave magnetic fields parallel to x (y). ... Spectral density of the spin bath. (a) NV S1, (b) NV S2. All values of spectral density S(ω) of the spin bath are extracted from the CPMG data (blue points). Each blue data point represents a specific probed**frequency**ω=πn/t, in which n is the number of control pulses and t is the specific duration. The red points are the average values at a certain**frequency**. The mean spectral density is fit to the Lorentzian function (Eq. (3)) (green line). (For interpretation of the references to color in this figure caption, the reader is referred to the web version of this article.) ... Characterization of lifetime of NV center spins. (a) Ramsey interference of NV S1 (circle) and NV S2 (diamond). The**oscillation**in Ramsey signal originates from the beating among different transitions corresponding to the host three 14N nuclear spin states. The**oscillation****frequency**of Ramsey signal is equal to microwave detuning from spin resonance. Solid lines ~exp[−(t/T2⁎)m] fit the experimental data points, where m is a free parameter. (b) Comparison of Hahn echo coherence time T2 of NV S1 (circle) and NV S2 (diamond). The solid lines are fits to ~exp[−(t/T2)p], in which p is a fit parameter.Data Types:- Image
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- Average PTO power as a function of
**oscillating****frequency**for straight (♦: solid line) and bent leg (□: broken line) tines (**oscillation**angle β=+27°). ... Subsoiler draft signals with time for the control and the range of**oscillating****frequencies**. ... Dominant**frequency**of draft signal over the**oscillating****frequency**range. ... Proportion of cycle time for cutting and compaction phases versus**oscillating****frequency**(**oscillation**angle β=+27°). ... Dominant**frequency**of torque signal over the**oscillating****frequency**range. ...**Frequency**...**Oscillating**tineData Types:- Image
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**Qubit**... (Color online.) Contour plots of the normalized decay rate γ(τ)/γ0 of the**qubit**only in the cavity bath, versus the time interval τ between successive measurements, and the central**frequency**ωcav of the cavity mode. (a) The width of the cavity**frequency**is λ=10−4Δ, and accordingly the cavity quality factor Q=104. (b) The width of the cavity**frequency**λ=5×10−3Δ, corresponding to the cavity quality factor Q=2×103. The region 1⩽γ(τ)/γ0⩽1.05 is shown as light magenta. The QZE region corresponds to γ(τ)/γ01. Evidently, a transition from the QZE to the AZE is observed by varying the central**frequency**of the cavity mode at finite τ (τ>0.6Δ−1 when Q=104, and τ>2.6Δ−1 when Q=2×103). ... (Color online.) Time dependence of the probability for the**qubit**at its excited state. In the resonant case, the parameters are ωcav=Δ=100g and τ=0.1g−1. In the detuning case, the cavity mode**frequency**is varied to ωcav=80g. Note that the successive measurements slow down the decay rate of excited state in the resonant case, which is the QZE. While in the detuning case, the measurements speed up the**qubit**decay rate, which is the AZE. ... The normalized effective decay rate γ(τ)/γ0 of the**qubit**for two quality factors Q when τ=5Δ−1, in the presence of both the cavity bath and the low-**frequency**qubitʼs intrinsic bath. ... (Color online.) (a) Sketch of a**qubit**with the spontaneous dissipation rate γ coupled to a cavity with the loss rate κ via a coupling strength g. (b) and (c) schematically show the bath density spectrum of the**qubit**environment: (b) the Ohmic qubitʼs intrinsic bath (green dashed) and the Lorentzian cavity bath (red solid), (c) the low-**frequency**qubitʼs intrinsic bath (green dashed) and the Lorentzian cavity bath (red solid). ... (Color online.) (a) Superconducting circuit model of a**frequency**-tunable transmission line resonator, which is archived by changing the boundary condition, coupled with a**qubit**. (b) Superconducting circuit model (1) of the effective tunable inductors, which are consisted of a series array of SQUIDs (2).Data Types:- Image
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- Optoelectronics and High
**Frequency**Device Research Laboratories, 34 Miyukigaoka, Tsukuba, Ibaraki 305, Japan... High-**frequency**characteristics of the p-ch HJFETData Types:- Image
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