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Related Concept Videos

Superconductor01:24

Superconductor

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A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Types Of Superconductors01:28

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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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The Quantum-Mechanical Model of an Atom02:45

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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Free Energy Changes for Nonstandard States03:25

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The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
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Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
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Spin–Spin Coupling: One-Bond Coupling01:17

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Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
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Related Experiment Video

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Witnessing Quantum Resource Conversion within Deterministic Quantum Computation Using One Pure Superconducting Qubit.

W Wang1, J Han1, B Yadin2

  • 1Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, China.

Physical Review Letters
|December 24, 2019
PubMed
Summary
This summary is machine-generated.

Deterministic quantum computation with one qubit (DQC1) consumes coherence to generate discord, demonstrating its role as a quantum resource converter. Superconducting circuits are a promising platform for DQC1 realization and resource dynamics characterization.

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Area of Science:

  • Quantum Information Science
  • Quantum Computation

Background:

  • Deterministic quantum computation with one qubit (DQC1) is known for achieving exponential quantum speedup with minimal entanglement.
  • The roles of quantum resources like coherence and discord in DQC1's performance advantage are actively debated.

Purpose of the Study:

  • To experimentally investigate the resource dynamics, specifically coherence and discord, during the execution of DQC1.
  • To confirm the role of DQC1 as a resource converter in a physical system.

Main Methods:

  • Realization of DQC1 using a superconducting circuit platform.
  • Engineering the system to precisely track the dynamics of coherence and discord throughout the DQC1 protocol.

Main Results:

  • Experimental confirmation that DQC1 functions as a resource converter.
  • Demonstration of coherence consumption and discord generation during DQC1 operation.

Conclusions:

  • Superconducting circuits are a viable platform for implementing DQC1 and related quantum algorithms.
  • The study provides experimental validation for the resource conversion dynamics in DQC1, highlighting the interplay between coherence and discord.