Temperature correlations of quantum spins.

نویسندگان

  • Its
  • Izergin
  • Korepin
  • Slavnov
چکیده

† Department of Mathematical Sciences, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202-3216, USA z C.N. Yang Institute for Theoretical Physics, State University of New York at Stony Brook, Stony Brook, NY 11794-3840, USA • St. Petersburg Department of Steklov Mathematical Institute, RAS 27, Fontanka, 191023, St. Petersburg, Russia ‡ Steklov Mathematical Institute, Gubkina 8, Moscow, 119991, Russia

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Universality in the entanglement structure of ferromagnets.

Systems of exchange-coupled spins are commonly used to model ferromagnets. The quantum correlations in such magnets are studied using tools from quantum information theory. Isotropic ferromagnets are shown to possess a universal low-temperature density matrix which precludes entanglement between spins, and the mechanism of entanglement cancellation is investigated, revealing a core of states re...

متن کامل

Quantum-classical crossover in the spin 1/2 XXZ chain

We compute, by means of exact diagonalization of systems of N = 16 and 18 spins, the correlation function < σz 0σ z n > at nonzero temperature for the XXZ model with anisotropy ∆. In the gapless ferromagnetic region −1 < ∆ < 0 for fixed separation the temperature can always be made sufficiently low so that the correlation is always negative. However we find that for sufficiently large temperatu...

متن کامل

Self-consistent Ornstein-Zernike approximation for three-dimensional spins

An Ornstein-Zernike approximation for the two-body correlation function embodying thermodynamic consistency is applied to a system of classical Heisenberg spins on a three-dimensional lattice. The consistency condition determined in a previous work is supplemented by introducing a simplified expression for the meansquare fluctuations of the spin on each lattice site. The thermodynamics and the ...

متن کامل

Fluctuation-induced heat release from temperature-quenched nuclear spins near a quantum critical point.

At a quantum critical point (QCP)--a zero-temperature singularity in which a line of continuous phase transition terminates--quantum fluctuations diverge in space and time, leading to exotic phenomena that can be observed at nonzero temperatures. Using a quantum antiferromagnet, we present calorimetric evidence that nuclear spins frozen in a high-temperature nonequilibrium state by temperature ...

متن کامل

Spin-liquid phase in a spin-1/2 quantum magnet on the kagome lattice.

We study a model of hard-core bosons with short-range repulsive interactions at half filling on the kagome lattice. Using quantum Monte Carlo numerics, we find that this model shows a continuous superfluid-insulator quantum phase transition, with exponents z=1 and nu approximately 0.67(5). The insulator, I*, exhibits short-ranged density and bond correlations, topological order, and exponential...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Physical review letters

دوره 70 11  شماره 

صفحات  -

تاریخ انتشار 1993