Abstract
An elastic string embedded between rigid walls is simulated by means of the density-matrix renormalization group. The string collides against the walls owing to the quantum-mechanical zero-point fluctuations. Such a “quantum entropic” interaction has come under thorough theoretical investigation in the context of the stripe phase observed experimentally in doped cuprates. We found that the excitation gap opens in the form of an exponential singularity (formula presented) That is, the excitation gap is much larger than that anticipated from mean field, suggesting that the string is subjected to a robust pinning potential due to the quantum collisions. This feature supports Zaanen’s “order out of disorder” mechanism, which would be responsible for the stabilization of the stripe phase.
| Original language | English |
|---|---|
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 66 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - Jan 1 2002 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Quantum-fluctuation-induced collisions and subsequent excitation gap of an elastic string between walls. / Nishiyama, Yoshihiro.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 66, No. 18, 01.01.2002, p. 1-5.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quantum-fluctuation-induced collisions and subsequent excitation gap of an elastic string between walls
AU - Nishiyama, Yoshihiro
PY - 2002/1/1
Y1 - 2002/1/1
N2 - An elastic string embedded between rigid walls is simulated by means of the density-matrix renormalization group. The string collides against the walls owing to the quantum-mechanical zero-point fluctuations. Such a “quantum entropic” interaction has come under thorough theoretical investigation in the context of the stripe phase observed experimentally in doped cuprates. We found that the excitation gap opens in the form of an exponential singularity (formula presented) That is, the excitation gap is much larger than that anticipated from mean field, suggesting that the string is subjected to a robust pinning potential due to the quantum collisions. This feature supports Zaanen’s “order out of disorder” mechanism, which would be responsible for the stabilization of the stripe phase.
AB - An elastic string embedded between rigid walls is simulated by means of the density-matrix renormalization group. The string collides against the walls owing to the quantum-mechanical zero-point fluctuations. Such a “quantum entropic” interaction has come under thorough theoretical investigation in the context of the stripe phase observed experimentally in doped cuprates. We found that the excitation gap opens in the form of an exponential singularity (formula presented) That is, the excitation gap is much larger than that anticipated from mean field, suggesting that the string is subjected to a robust pinning potential due to the quantum collisions. This feature supports Zaanen’s “order out of disorder” mechanism, which would be responsible for the stabilization of the stripe phase.
UR - http://www.scopus.com/inward/record.url?scp=85038281831&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85038281831&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.66.184501
DO - 10.1103/PhysRevB.66.184501
M3 - Article
AN - SCOPUS:85038281831
VL - 66
SP - 1
EP - 5
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 18
ER -