APCTP	■ Introduction · Greetings · Milestones · Organization Chart · Board Members · Staff Members · Former Board Members · Annual Reports · APCTP Logo · Contact us ■ Members · Member Countries · Partnership Institutions ■ Media · APCTP in Media · AAPPS Bulletin ■ Visitor Information · Plan Your Visit · Directions · Tips for Visitors · Facilities Guide · Map ■ Sponsors

Activities	■ Scientific Activities · Scientific Programs · Seminars & Lectures · ICTP Affiliated Center (ICAC) · Scientific Calendar · Call for Programs · Past Scientific Programs · Past Seminars & Lectures · Payment ■ Awards and Visitors · Benjamin Lee Professorship · Visitors · Visitor Information · Visitor Application ■ Outreach Programs · Web Journal <Crossroads> · APCTP Books · Events · Science at Pohang · Past Events

Research	■ Junior Research Groups ■ Young Scientist Training Program ■ Senior Advisory Group ■ APCTP-POSTECH Fellows ■ Publications

Asia Pacific Network	■ Academic Activities in the AP Region · Seminars at IBS: Theoretical Physics of Complex Systems · Center For QUANTUM SPACETIME · Association of Asia Pacific Physical Societies · FIST - Asia Network on HEP · ANPhA - Asian Nuclear Physics Association · APCTP Japan Committee · ICTP Asian Network on Condensed Matter and Complex Systems

Seminars & Lectures

* TITLE

Topological Deformation based on Sinusoidal Functions

* SPEAKERS

Name	Affiliation	E-mail
Maruyama Isao	Osaka University

* HOST(Applicant)

Name	Affiliation	E-mail
Tetsuya Takimoto	APCTP

* DATE / TIME

2012-12-05, 2:00PM

* ABSTRACT

Since boundaries play a role of impurity, the Fermi sea disturbed by the boundary generates the 2 k_F oscillation which is observed in various quantities, where k_F is the Fermi wavevector. In the density matrix renormalization group method, which is a powerful numerical method for
one-dimensional strongly-correlated systems, the 2 k_F oscillation due to the open boundary condition causes a numerical difficulty. To avoid the difficulty, several smooth boundary conditions have been studied. Recently, the sinusoidal square deformation (SSD) was proposed.[1] Surprisingly, the SSD works well not only numerically but also exactly in some cases. That is, the many body wave function under the periodic boundary condition is exactly equal to that under
the open boundary condition with the SSD. The reason is clearly understood by the Fermi sea.[2] Extending the SSD toward more general cases, we propose a real-time manipulation to decouple quantum systems without disturbing the Fermi sea. This decoupling operation opens a way to real-time spatial separation of the gapless Fermi liquid system without losing quantum entanglement.

[1] A. Gendiar, et.al., Prog. Theor. Phys. 122, 953 (2009); ibid, Phys. 123, 393 (2010).
[2] IM, et.al., Phys. Rev. B 84, 165132 (2011).

Map

How to get to APCTP

Scientific Activities Calendar

Scientific programs

Modal title

Modal title