Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Jun-Qing Cheng"'
Publikováno v:
npj Quantum Materials, Vol 9, Iss 1, Pp 1-12 (2024)
Abstract Motivated by recent advancements in theoretical and experimental studies of the high-energy excitations on an antiferromagnetic trimer chain, we numerically investigate the quantum phase transition and composite dynamics in this system by ap
Externí odkaz:
https://doaj.org/article/517e9c9bd6a6472caef908c36c645e9c
Publikováno v:
Communications Physics, Vol 7, Iss 1, Pp 1-9 (2024)
Abstract Local constraint in the lattice gauge theory provides an exotic mechanism that facilitates the disorder-free localization. However, the understanding of nonequilibrium dynamics in the non-Hermitian lattice gauge model remains limited. Here,
Externí odkaz:
https://doaj.org/article/9dac048855e148f188494cafa3efec54
Publikováno v:
npj Quantum Materials, Vol 7, Iss 1, Pp 1-11 (2022)
Abstract Using quantum Monte Carlo, exact diagonalization, and perturbation theory, we study the spectrum of the S = 1/2 antiferromagnetic Heisenberg trimer chain by varying the ratio g = J 2/J 1 of the intertrimer and intratrimer coupling strengths.
Externí odkaz:
https://doaj.org/article/4a3bf9f468f54a6b8c806ed4a67a292e
Publikováno v:
npj Quantum Materials, Vol 7, Iss 1, Pp 1-11 (2022)
Using quantum Monte Carlo, exact diagonalization and perturbation theory, we study the spectrum of the $S=1/2$ antiferromagnetic Heisenberg trimer chain by varying the ratio $g=J_2/J_1$ of the intertrimer and intratrimer coupling strengths. The doubl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d93de15364b32deaebe46f90bf218270
http://arxiv.org/abs/2011.02448
http://arxiv.org/abs/2011.02448
Publikováno v:
Quantum Information Processing. 18
We study the topological quantum phase transition in the 2-D Kitaev honeycomb model by making use of the square root of the quantum Jensen–Shannon divergence and find that the square root of the quantum Jensen–Shannon divergence exhibits singular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de7ebd45d43b88e7cb0501204ccebaf2
https://doi.org/10.1007/s11128-018-2115-3
https://doi.org/10.1007/s11128-018-2115-3
Autor:
Jun-Qing Cheng, Wei Wu
Publikováno v:
Quantum Information Processing. 17
We investigate the non-Markovian dynamics of a qubit–oscillator system embedded in a noisy environment by employing the hierarchical equations of motion approach. It is shown that the decoherence rate of the whole qubit–oscillator–bath system c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a04a48d916f0f6ffea425ee5fe6f7cf0
https://doi.org/10.1007/s11128-018-2071-y
https://doi.org/10.1007/s11128-018-2071-y
We investigate the quantum evolution speed of a qubit in two kinds of finite-temperature environments. The first environment is a bosonic bath with Ohmic-like spectrum. It is found that the high temperature not only leads to the speed-up but also spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::649b88b6c0575c3b716ecaa13c54968a
Autor:
Jing-Bo Xu, Jun-Qing Cheng
We investigate the quantum phase transitions of the transverse-field quantum Ising model on the triangular lattice and Sierpi\'nski fractal lattices by employing multipartite entanglement and quantum coherence along with the quantum renormalization g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35f7393e9f690d81ca6337fdc3c749db
Publikováno v:
Quantum Information Processing. 16
We investigate the multipartite entanglement and trace distance of the one-dimensional anisotropic spin-1/2 XXZ spin chain with the Dzyaloshinskii---Moriya interaction and find that the Dzyaloshinskii---Moriya interaction can influence the entangleme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b419bc2a0fed539b48c03023f0ab7e8c
https://doi.org/10.1007/s11128-017-1683-y
https://doi.org/10.1007/s11128-017-1683-y
Publikováno v:
Journal of the Optical Society of America B. 34:701
We investigate the effect of quantum-jump-based feedback on the dynamics of quantum discord for two noninteracting two-level atoms coupled to a single mode of the cavity field with and without the rotating-wave approximation. It is found that the cou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbad14ef7336788c6478ba04ce5cfc0b
https://doi.org/10.1364/josab.34.000701
https://doi.org/10.1364/josab.34.000701