Logo
Pattern

Discover published sets by community

Explore tens of thousands of sets crafted by our community.

Quantum Decoherence

15

Flashcards

0/15

Still learning
StarStarStarStar

Quantum Zeno Effect

StarStarStarStar

The Quantum Zeno Effect demonstrates that frequent observations of a quantum system can effectively freeze its evolution, providing an unexpected interplay with decoherence.

StarStarStarStar

Wigner-Weisskopf Approximation

StarStarStarStar

The Wigner-Weisskopf approximation is a technique used to model the decay of quantum states due to interaction with the environment, providing insight into the decoherence process.

StarStarStarStar

Decoherence and Superposition

StarStarStarStar

Decoherence destroys quantum superposition in a preferred basis determined by the system's interaction with the environment, leading to the emergence of classical states.

StarStarStarStar

Decoherence and Quantum Error Correction

StarStarStarStar

Quantum error correction techniques are designed to protect quantum information by mitigating the effects of decoherence and other quantum noise.

StarStarStarStar

Time Scales of Decoherence

StarStarStarStar

Decoherence typically occurs on much shorter time scales compared to the dynamic evolution of quantum systems, usually making it a rapid process relative to quantum operations.

StarStarStarStar

Pointer States

StarStarStarStar

Pointer states are certain stable states of the quantum system that result from the decoherence process and are less susceptible to destructive interference from the environment.

StarStarStarStar

Experimental Observation of Decoherence

StarStarStarStar

Decoherence has been experimentally observed in various physical systems, such as trapped ions, quantum dots, and superconducting qubits, solidifying it as a physical phenomenon.

StarStarStarStar

Measurements and Decoherence

StarStarStarStar

Measurements, considered as an interaction with an external apparatus, can cause decoherence, collapsing the quantum system into a particular eigenstate of the measured observable.

StarStarStarStar

Definition of Quantum Decoherence

StarStarStarStar

Quantum decoherence refers to the loss of quantum coherence wherein a quantum system transitions from a pure quantum state into a mixed state as it interacts with its environment.

StarStarStarStar

Role of Entanglement in Decoherence

StarStarStarStar

Entanglement between a quantum system and its environment is a key mechanism by which decoherence arises, as system states become correlated with the environmental states.

StarStarStarStar

Effects of Decoherence on Quantum Computers

StarStarStarStar

Decoherence leads to computational errors in quantum computers by causing loss of information encoded in quantum states, which is a fundamental challenge to reliable quantum computation.

StarStarStarStar

Examples of Decoherence Sources

StarStarStarStar

Sources of decoherence in quantum systems include thermal fluctuations, electromagnetic field interactions, and collisions with other particles.

StarStarStarStar

Decoherence Free Subspaces (DFS)

StarStarStarStar

Decoherence Free Subspaces are subspaces of a quantum system's Hilbert space that are preserved under interaction with the environment, effectively immune to certain types and sources of decoherence.

StarStarStarStar

Quantum Coherence Time

StarStarStarStar

Quantum coherence time is the time scale over which a quantum system retains its coherence before decoherence effects become significant, determining the system's usefulness for quantum computation.

StarStarStarStar

Environmental Engineering to Mitigate Decoherence

StarStarStarStar

To combat decoherence, techniques such as cryogenic cooling, magnetic shielding, and vacuum enclosures are employed to isolate quantum systems from environmental noise.

Know
0
Still learning
Click to flip
Know
0
Logo

© Hypatia.Tech. 2024 All rights reserved.