Filter Results

21896 results

- Current-composed quantity Q(t) (solid lines) and the far-removed
**qubit**QD occupancy, n3 (dashed lines), as a function of time for the horizontal**qubit**-detector connection, U13=U24=0, 2 or 4, respectively. μL=−μR=20, ΓL=5, ΓR=10, U12=U34=5 and the other parameters are the same as in Fig. 2. The lines for U13=U24=2 (4) are shifted by −1 (−2) for better visualisation. ... The sketch of the**qubit**-detector systems discussed in the text. Double quantum dot (1 and 4) between the left and right electron reservoirs stands for the**qubit**charge detector.**Qubit**is represented by two coupled quantum dots (2 and 3) occupied by a single electron. Straight black (zig-zag red) lines correspond to the tunnel matrix elements V14, V23 (Coulomb interactions, e.g. U14, U24) between the appropriate states. (For interpretation of the references to color in this figure caption, the reader is referred to the web version of this article.) ... The asymptotic pulse-induced current I(τ) against the time interval (pulse length) τ – for details see the text – and the charge occupation of the far-removed**qubit**QD, n3, (dashed lines) for the**qubit**-detector system schematically shown in Fig. 1b. The upper (bottom) panel corresponds to ΓL=5, ΓR=10 (ΓL=5, ΓR=1). μL=−μR=20 and the other parameters are the same as in Fig. 2. The current lines are multiplied by −2 for better visualisation. ... Current-composed quantity Q(t) (solid lines) and the charge occupation of the far-removed**qubit**QD, n3, (dashed lines) as a function of time for the**qubit**-detector system schematically shown in Fig. 1b. The upper (bottom) panel corresponds to (ΓL,ΓR)=(5,1) ((ΓL,ΓR)=(5,10)). The other parameters are: μL=−μR=2 or μL=−μR=20, ε1,2,3,4=0, U24=5, U14=50, n2(t<10)=0, n3(t<10)=1. The lines for μL=−μR=20 are shifted by −1 for better visualisation. ... Upper panel: Current-composed quantity Q(t) (solid lines) and the far-removed**qubit**QD occupancy, n3, (dashed lines) as a function of time for different**qubit**-detector connections shown in Fig. 1d (U12=5), Fig. 1c (U12=U24=5) and Fig. 1b (U24=5)—the upper, middle and lower curves, respectively. The bottom panel depicts the corresponding left (solid lines) and right (dashed lines) currents, IL(t), IR(t), flowing in the system for the above three**qubit**-wire connections. μL=−μR=2, ΓL=5, ΓR=10 and the other parameters are the same as in Fig. 2. The lines in the upper panel for U12=U24=5 and for U24=5 are shifted by −1 and −2, respectively, and by −0.15 and −0.3 in the bottom panel. Note different scales in the vertical axis of both panels.Data Types:- Image

- Diagrammatic representation of time-resolved CARS. Both time-circuit and Feynman diagram are illustrated for a non- overlapping sequence of P, S, P′ pulses, with central
**frequency**of the S-pulse chosen to be outside the absorption spectrum of the B←X transition, to ensure that only the P(0,3) component of the third-order polarization is interrogated. In this dominant contribution, all three pulses act on bra (ket) state while the ket (bra) state evolves field free. Note, for the Feynman diagrams, we use the convention of Ref. [6], which is different than that of Ref. [5]. ... The wavepacket picture associated with the evolution of the ket-state in the diagram of Fig. 1, for resonant CARS in iodine. The required energy matching condition for the AS radiation, Eq. (10b) of text, can only be met when the packet reaches the inner turning point of the B-surface. Once prepared, ϕ(3)(t) will**oscillate**, radiating periodically every time it reaches the inner turning point.Data Types:- Image

- Schematic diagram of a cryogenic crystal
**oscillator**based on a SiGe HBT. ...**Oscillator**model for the phase noise analysis. ...**Oscillator**mounting inside the cryocooler. ... Time and**Frequency**Department, FEMTO-ST Institute, Besançon, France... Schematic diagram of a cryogenic crystal**oscillator**based on a MOSFET transistor. ... Low noise**oscillators**... PSD of two HBT-based liquid helium**oscillators**, for different bias voltages.Data Types:- Image

**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
- Tabular Data

- 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

- Optoelectronics and High
**Frequency**Device Research Laboratories, 34 Miyukigaoka, Tsukuba, Ibaraki 305, Japan... High-**frequency**characteristics of the p-ch HJFETData Types:- Image
- Tabular Data

- 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
- Tabular Data

**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
- Tabular Data

- Traveling wave resonator with two ports incorporated into interferometric
**frequency**discriminator for**oscillator**stabilisation. ... Modified Galani**oscillator**stabilisation technique utilising travelling wave resonator with standing wave ratio. ...**Frequency**Standards and Metrology Group, School of Physics, University of Western Australia, 35 Stirling Hwy, Crawley 6009, AustraliaData Types:- Image

4