Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Disorder induced cross-over effects at quantum critical points.

E Carlon1, P Lajkó, F Iglói

  • 1INFM, Dipartimento di Fisica, Università di Padova, I-35131 Padova, Italy.

Physical Review Letters
|January 22, 2002
PubMed
Summary

This study investigates quantum spin chains with disorder, revealing three distinct phases. Critical properties shift from pure system behavior to infinite randomness depending on disorder strength.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Twist-bend coupling, twist waves, and the shape of DNA loops.

Physical review. E·2019
Same author

Effect of Memory and Active Forces on Transition Path Time Distributions.

The journal of physical chemistry. B·2018
Same author

Transition path time distributions.

The Journal of chemical physics·2017
Same author

Non-Markovian dynamics of reaction coordinate in polymer folding.

Soft matter·2017
Same author

Heterodimer Autorepression Loop: A Robust and Flexible Pulse-Generating Genetic Module.

Physical review letters·2016
Same author

Dynamic range extension of hybridization sensors.

Biosensors & bioelectronics·2014

Area of Science:

  • Condensed Matter Physics
  • Quantum Mechanics
  • Statistical Mechanics

Background:

  • Quantum spin chains are fundamental models in condensed matter physics.
  • Disorder plays a crucial role in determining the critical properties and phases of quantum systems.
  • Understanding the interplay between quantum criticality and disorder is essential for predicting material behavior.

Purpose of the Study:

  • To investigate the critical properties of quantum spin chains at zero temperature under varying degrees of disorder.
  • To map out the phase diagram of disordered quantum spin chains.
  • To analyze the nature of critical behavior in different disorder regimes.

Main Methods:

  • Analytical techniques were employed to study the critical properties.

Related Experiment Videos

  • Extensive Density Matrix Renormalization Group (DMRG) methods were utilized for numerical simulations.
  • Zero-temperature analysis was performed to focus on ground-state properties.

    • Main Results:

    • A phase diagram comprising three distinct phases was identified.
    • The weak disorder regime exhibits critical behavior governed by the fixed points of the pure system.
    • The strong disorder regime is characterized by an infinite randomness fixed point.
    • An intermediate disorder regime was discovered with anisotropic dynamical scaling and disorder-dependent exponents.

    Conclusions:

    • The phase diagram of disordered quantum spin chains is complex, featuring distinct regimes.
    • Disorder fundamentally alters the critical behavior, leading to new universality classes.
    • The identified intermediate regime highlights unique scaling properties not present in pure systems.