scholarly journals Exact Ground States of a Frustrated 2D Magnet: Deconfined Fractional Excitations at a First-Order Quantum Phase Transition

2004 ◽  
Vol 93 (21) ◽  
Author(s):  
C. D. Batista ◽  
S. A. Trugman
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Ground States ◽  
Quantum Phase ◽  
First Order

scholarly journals First-order quantum phase transition in the orthogonal-dimer spin chain

2000 ◽  
Vol 62 (9) ◽  
pp. 5558-5563 ◽  
Author(s):  
Akihisa Koga ◽  
Kouichi Okunishi ◽  
Norio Kawakami
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Spin Chain ◽  
Quantum Phase ◽  
First Order

scholarly journals Entanglement entropy in quasi-symmetric multi-qubit states

2015 ◽  
Vol 13 (02) ◽  
pp. 1550007 ◽  
Author(s):  
Zhi-Hua Li ◽  
An-Min Wang
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Entanglement Entropy ◽  
Ground States ◽  
Quantum Phase ◽  
Transition Points ◽  
Qubit States ◽  
Basis Vectors ◽  
Dicke States

We generalize the symmetric multi-qubit states to their q-analogs, whose basis vectors are identified with the q-Dicke states. We study the entanglement entropy in these states and find that entanglement is extruded towards certain regions of the system due to the inhomogeneity aroused by q-deformation. We also calculate entanglement entropy in ground states of a related q-deformed Lipkin–Meshkov–Glick (LMG) model and show that the singularities of entanglement can correctly signify the quantum phase transition points for different strengths of q-deformation.

Observation of Longitudinal Magnetic Fluctuations at a First-Order Ferromagnetic Quantum Phase Transition in UGe2

2021 ◽  
Vol 90 (7) ◽  
pp. 073707
Author(s):  
Yuichiro Noma ◽  
Hisashi Kotegawa ◽  
Tetsuro Kubo ◽  
Hideki Tou ◽  
Hisatomo Harima ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Magnetic Fluctuations ◽  
First Order
Sign in / Sign up

Export Citation Format

Share Document