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Yu, Yue; Wang, Ziqiang; Yu, Y , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China | |
An exactly soluble model with tunable p-wave paired fermion ground states | |
Source Publication | EPL |
Keyword | Quantum Computation Anyons Phase |
Abstract | Motivated by the work of Kitaev, we construct an exactly soluble spin-1/2 model on a honeycomb lattice whose ground states are identical to Delta(1x)p(x) + Delta(1y)p(y) + i(Delta(2x)p(x) + Delta(2y)p(y))- wave paired fermions on a square lattice, with tunable paring order parameters. We derive a universal phase diagram for this general p-wave theory which contains a gapped A-phase and a topologically non-trivial B-phase. We show that the gapless condition in the B-phase is governed by a generalized inversion (G-inversion) symmetry under p(x) <-> Delta(1y)/Delta(1x)p(y). The G-inversion symmetric gapless B-phase near the phase boundaries is described by (1 + 1)- dimensional gapless Majorana fermions in the asymptotic long-wavelength limit, i. e. the c = 1/2 conformal. field theory. The gapped B-phase has G-inversion symmetry breaking and is the weak pairing phase described by the Moore-Read Pfaffian. We show that in the gapped B-phase, vortex pair excitations are separated from the ground state by a. finite energy gap. Copyright (C) EPLA, 2008 |
2008 | |
ISSN | 0295-5075 |
Volume | 84Issue:5Pages:- |
Subject Area | Physics |
Indexed By | SCI |
Funding Organization | NNSF of China; Ministry of Science and Technology of China; CAS; U. S. DOE[DE-FG02-99ER45747] ; NNSF of China; Ministry of Science and Technology of China; CAS; U. S. DOE[DE-FG02-99ER45747] ; NNSF of China; Ministry of Science and Technology of China; CAS; U. S. DOE[DE-FG02-99ER45747] ; NNSF of China; Ministry of Science and Technology of China; CAS; U. S. DOE[DE-FG02-99ER45747] |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.itp.ac.cn/handle/311006/5418 |
Collection | 理论物理所科研产出_SCI论文 |
Corresponding Author | Yu, Y , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China |
Recommended Citation GB/T 7714 | Yu, Yue,Wang, Ziqiang,Yu, Y , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. An exactly soluble model with tunable p-wave paired fermion ground states[J]. EPL,2008,84(5):-. |
APA | Yu, Yue,Wang, Ziqiang,&Yu, Y , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.(2008).An exactly soluble model with tunable p-wave paired fermion ground states.EPL,84(5),-. |
MLA | Yu, Yue,et al."An exactly soluble model with tunable p-wave paired fermion ground states".EPL 84.5(2008):-. |
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