Bogoliubov theory for a disordered Bose-Hubbard Model in weakly interacting regime

WANG Botao; JIANG Ying

Chinese︱Feedback︱Save this page

• Elaborating Academic Views 　　　　 • Exchanging Innovative Ideas
• Protecting Intellectual Properties 　　• Fast Sharing Science Papers

Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China

Home > Papers

Bogoliubov theory for a disordered Bose-Hubbard Model in weakly interacting regime

WANG Botao 1 #,JIANG Ying 2 *

1.Department of Physics, Shanghai University, Shanghai 200444

2.Department of Physics, Shanghai University, Shanghai 200444;Shanghai Key Laboratory of High Temperature Superconductors, Shanghai 200444

*Correspondence author

#Submitted by

Subject:

Funding: National Natural Science Foundation of China （No.11275119）, Ph.D. Programs Foundation of Ministry of Education of China （No.20123108110004）, Shanghai Key Laboratory of High Temperature Superconductors （No.14DZ2260700）

Opened online: 6 June 2016

Accepted by: none

Citation: WANG Botao,JIANG Ying.Bogoliubov theory for a disordered Bose-Hubbard Model in weakly interacting regime[OL]. [ 6 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4693083

We investigate the disorder effect on coherent fraction and the quantum phase transition of ultracold Bose gases trapped in a two-dimensional disordered optical lattice.Within the framework of Bogoliubov theory, an analytical expression for the particle density is derived and the dependence of coherent fraction on disorder strength as well as on lattice depth is discussed. In weak disorder regime, we find a decreased sensitivity of coherent fraction to disorder with the increase of on-site interaction strength. For strong disorder, the quantum phase boundary between superfluid phase and Bose glass phase in the disordered Bose-Hubbard system in weak interaction regime is discussed qualitatively. The obtained phase diagram is in qualitative agreement with the empirical square-root law. The dependence of the corresponding critical value of the disorder strength on optical lattice depth is presented as well, and may serve as a reference object for possible experimental investigation.

Keywords:Condensed matter physics, disordered Bose-Hubbard model, coherent fraction, quantum phase transition

For this paper

● PDF (0B)
● Revision 0 　　
● Print this paper
● Recommend this paper to a friend
● Add to my favorite list

Saved Papers

Please enter a name for this paper to be shown in your personalized Saved Papers list

Tags

Add yours

Related Papers

Statistics

PDF Downloaded	32
Bookmarked	0
Recommend	0
Comments	Array

Submit your papers

Alert Name:
Alerting to:
Authentication email will be sent to your email address in 24 hours
Frequency:
Email Message Format:	Plain text Graphical(HTML)

Complete the form below and we will recommend the selected titles to your friends on your behalf. * Indicates a required field.
Your name*:
Your email address*:
Recipient's name*:
Recipient's email address*:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find the page(s) useful.

Your name:
Your email address:
Recipient's name:
Recipient's email address:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find this page useful.

Disclaimer: This message was sent to your friend using the "Send it to a friend" facility on the Sciencepaper Online’ WWW site, http://www.paper.edu.cn/en. The Sciencepaper Online is not responsible for the content of this email, and anything said in this email does not necessarily reflect the Sciencepaper Online's views.

	Check out RSS, or use RSS reader to subscribe this item

Saved Papers