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**Qubit**dynamics in Bloch ball picture. North pole corresponds to the excited (antisymmetric) energy eigenstate |1〉 and south pole corresponds to the ground (symmetric) state |0〉. Initially the electron is localized in one of the dots. Quality of Rabi**oscillations**Q=40. The effect of image charge potential: (a) K=0 and (b) K=0.4. ... Quality of**qubit**Rabi**oscillations**vs. distance to a metal surface. Centers of quantum dots are located 100nm apart. Lines and points correspond to analytical and numerical solutions, respectively. ... Quality of**qubit**Rabi**oscillations**vs. the distance between quantum dots.**Qubit**is located 50nm far from the metal surface. Lines and points correspond to analytical and numerical solutions, respectively. ... The moving charge in the**qubit**drags charges in metal that indispensably entails Joule loss: d is a double dot separation and D is a distance to the metal surface.Data Types:- Image

- 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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- 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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**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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- The relational curve of the
**oscillating**period T and the electron–LOP coupling constant α. ...**Qubit**... The relational curve of the**oscillating**period T and the confinement length R.Data Types:- Image

- The same as in Fig. 4 for U=2 and for the time-dependent energy levels ε1 and ε2 presented in the inset in the left panel—they
**oscillate**harmonically with**frequency**ω=1 and the pulse envelope has a Gaussian shape of duration τ=30 centered at t0=100. ... The same as in Fig. 3 but for U=0 (upper panels) and for U=2 (lower panels) for the time-dependent energy levels ε1 and ε2 presented in the inset, in the upper left panel—they**oscillate**harmonically around the values ε=±1 with**frequency**ω=0.1, and the pulse envelope has a Gaussian shape of duration τ=30 centered at t0=92. The energy levels of the right**qubit**have constant values ε3=ε4=1. ... Coupled**qubits**... Occupancy probability n1(t=∞) of the first QD of the left**qubit**(**qubits**are in the perpendicular configuration) as a function of the**frequency**ω of the time-dependent V1(t) displayed in the inset—it**oscillates**harmonically with ω=0.5 and the pulse envelope has a Gaussian shape of duration τ=30, V2=1, U1=U2=2, εi=0, n1(0)=n3(0)=1. ... Occupation probability n1(t) of the first QD in the left**qubit**(the left panel) and n4(t) of the second QD in the right**qubit**(the right, panel) as the functions of time for U=10. The energy levels ε1 and ε2 of the left**qubit****oscillate**harmonically around the values ε=±2 with amplitude Δ=2,**frequency**ω=0.05 (in V/ℏ units, see the inset in the left panel) and energy levels of the right**qubit**having constant values, ε3=−ε4=2. The**qubits**are in the linear configuration. ... Schematic representation of two interacting**qubits**formed by two DQDs with one excess electron in each**qubit**. The broken lines correspond to the Coulomb interaction U between the electrons localized on the neighboring QDs of both**qubits**and V denotes the interdot tunneling matrix element. ... Charge**oscillations**Data Types:- Image

- In all plots the decay rates κ/g=0.1, γr/g=4.35×10-2, and cavity factor Q=1400. The quantum dot excitonic Bohr
**frequency**is assumed to be in resonance with the cavity field**frequency**, i.e., ωqd=ωc. The amplitude of the external laser field to the cavity decay rate ratio is fixed to I/κ=631. The coherence ρ01≡ρ(0,1) dynamics is plotted for: (a) Δωcl=0.4g; (b) Δωcl=g; (c) Δωcl=100g; (d) Δωcl=1000g. The cavity photons mean number is plotted in (e) and (f). We have used a logarithmic scale for the time axis and the values: (i) Δωcl=g; (ii) Δωcl=1000g, for the solid and dotted curves, respectively. ... Rabi**oscillations**Data Types:- Image

- 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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- 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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- 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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