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Related Concept Videos

Pulse01:16

Pulse

2.2K
When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
2.2K
Pulse01:05

Pulse

4.2K
The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls...
4.2K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.8K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.8K
Pulse Oximetry01:24

Pulse Oximetry

1.4K
Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
1.4K
Regulation of Pulse01:20

Regulation of Pulse

2.3K
Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.
2.3K
Pulse rhythm01:30

Pulse rhythm

1.4K
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
1.4K

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Updated: Feb 10, 2026

Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm
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Tunable, Flexible, and Efficient Optimization of Control Pulses for Practical Qubits.

Shai Machnes1,2, Elie Assémat1, David Tannor2

  • 1Theoretical Physics, Saarland University, 66123 Saarbrücken, Germany.

Physical Review Letters
|May 15, 2018
PubMed
Summary

Gradient Optimization of Analytic Controls (GOAT) offers a simple, flexible method for optimizing quantum control pulses. This technique meets stringent fidelity demands for superconducting qubits, enhancing quantum computation and sensing applications.

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Area of Science:

  • Quantum Computing
  • Quantum Control
  • Superconducting Qubits

Background:

  • Quantum computation requires high gate fidelities and hardware-specific control constraints.
  • Superconducting qubits necessitate simple pulse parameterizations for experimental calibration.
  • High fidelities are crucial for quantum technologies like sensing.

Purpose of the Study:

  • To introduce a novel, easy-to-implement gradient-based optimal control technique.
  • To address the requirements of simple parameterization and high fidelity for superconducting qubits.
  • To demonstrate flexibility and ease of calibration in optimizing quantum control pulses.

Main Methods:

  • Developed Gradient Optimization of Analytic Controls (GOAT), a gradient-based optimal control method.
  • Optimized fast coherence-limited pulses tailored for specific hardware constraints.
  • Applied GOAT to flux-tunable and fixed-frequency transmon qubit architectures.

Main Results:

  • GOAT successfully satisfies stringent gate fidelity demands for quantum computation.
  • The technique allows for simple pulse parameterizations, aiding experimental calibration.
  • Demonstrated GOAT's effectiveness on two leading superconducting qubit architectures.

Conclusions:

  • GOAT provides a flexible and straightforward approach to quantum optimal control.
  • The method enhances the performance and calibration of superconducting qubits.
  • GOAT is suitable for demanding applications in quantum computation and sensing.