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Related Concept Videos

Long-Term Memory01:18

Long-Term Memory

Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
Sensory Memory01:14

Sensory Memory

Sensory memory captures information from the environment in its original form for a very brief duration, just long enough to be exposed to visual, auditory, and other senses. This type of memory is detailed and rich but quickly lost unless certain strategies are employed to transfer it into short-term or long-term memory. Sensory information is continuously bombarding the human brain, yet only a small fraction is absorbed, as most of it does not significantly impact daily life. For instance,...
Long-term Potentiation01:35

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Long-term Potentiation01:25

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
Measurement: Standard Units03:38

Measurement: Standard Units

Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement (a unit), and an indication of the uncertainty of the measurement. While the number and unit are explicitly represented when a quantity is written, the uncertainty is an aspect of the errors in the measurement results.
Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

Improving short-term memory can be achieved through techniques like chunking and rehearsal. Chunking involves organizing information into larger, more manageable units. This technique is particularly useful for information that exceeds the typical memory span of between five and nine items. For instance, logging into an online account with a password like "ta89vq0179gz" involves grouping letters and numbers into three chunks—ta89, vq01, and 79gz. It makes large amounts of information more...

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Related Experiment Video

Updated: May 21, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Room-temperature quantum bit memory exceeding one second.

P C Maurer1, G Kucsko, C Latta

  • 1Department of Physics, Harvard University, Cambridge, MA 02138, USA.

Science (New York, N.Y.)
|June 9, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed a robust solid-state qubit using a diamond crystal. This quantum bit preserves polarization for minutes and has coherence lifetimes over 1 second at room temperature, enabling quantum information applications.

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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Materials Science

Background:

  • Stable quantum bits (qubits) are crucial for quantum computing and information storage.
  • Existing qubit technologies face challenges in maintaining coherence and scalability for practical applications.
  • Room-temperature operation and long coherence times are highly desirable for widespread qubit integration.

Purpose of the Study:

  • To demonstrate high-fidelity control of a novel solid-state qubit.
  • To achieve long qubit memory times and coherence lifetimes at room temperature.
  • To explore the potential of this qubit system for quantum information science applications.

Main Methods:

  • Fabrication of a qubit using a single carbon-13 nuclear spin near a nitrogen-vacancy center in isotopically purified diamond.
  • Implementation of dissipative decoupling techniques to isolate the nuclear spin from environmental noise.
  • Experimental verification of qubit polarization preservation and coherence lifetime measurements.

Main Results:

  • Demonstrated high-fidelity control over the solid-state qubit.
  • Achieved polarization preservation for several minutes at room temperature.
  • Measured coherence lifetimes exceeding 1 second at room temperature.
  • The qubit system exhibits robustness and potential for scalability.

Conclusions:

  • The developed solid-state qubit offers unprecedented stability and long coherence times at room temperature.
  • The use of dissipative decoupling is effective in extending qubit memory.
  • This robust and scalable qubit platform holds significant promise for advancing quantum information science and technology.