在(Quantum information Processing,2017,16,106),对于多体复合量子系统量子态,基于密度算子的迭代重排给出了多体量子态完全可分的一个必要条件。将其推广到了多体量子态相对于k体分划的情形,首先讨论了多体量子态相对于k体分划的迭...在(Quantum information Processing,2017,16,106),对于多体复合量子系统量子态,基于密度算子的迭代重排给出了多体量子态完全可分的一个必要条件。将其推广到了多体量子态相对于k体分划的情形,首先讨论了多体量子态相对于k体分划的迭代重排的定义及性质,然后基于此迭代重排的定义,给出了多体量子态k可分的一个必要条件,并通过一个例子说明该判据是有效的,其可以探测多体k不可分纠缠态。展开更多
Gauge potential plays an important role in exploring exotic phenomena in the single- and many-body quantum systems.In this paper,we propose a scheme to create both new Abelian and non-Abelian gauge potentials by adiab...Gauge potential plays an important role in exploring exotic phenomena in the single- and many-body quantum systems.In this paper,we propose a scheme to create both new Abelian and non-Abelian gauge potentials by adiabatically controlling the degenerate Dicke model in cavity quantum electrodynamics.It is shown that a non-Abelian gauge potential is achieved only for a single atom,whereas an Abelianizen diagonal gauge potential is realized for the atomic ensemble.More importantly,two interesting quantum phenomena such as the geometric phase and the magnetic monopole induced by our created gauge potentials are also predicted.The possible physical realization is presented in the macroscopic circuit quantum electrodynamics with the Cooper pair boxes,which act as the artificial two-level atoms controlled by the gate voltage and the external magnetic flux.展开更多
We study contributions of the pion meson and spatial component of the omega meson in the odd-A carbon isotopes. The pion and spatial omega provide small attractions in odd-A nuclei, giving rise to considerable influen...We study contributions of the pion meson and spatial component of the omega meson in the odd-A carbon isotopes. The pion and spatial omega provide small attractions in odd-A nuclei, giving rise to considerable influences on the single-particle energies rather than the bulk properties such as total binding energies, and root-mean-square (rms) radii. The ±? (spin) splittings, arising from the spatial omega, are large in <SUP>11</SUP>C and <SUP>13</SUP>C and drop as the isospin rises in odd-A carbon isotopes. As an isovector, the pion can shift slightly the relative potential depth of neutron and proton, contrary to the role of the rho meson. There is a general trend that both the pion and spatial omega fields reduce with the rise of isospin in the isotopic chain. From the normal nucleus to halo nucleus, an abnormal drop of the pion or spatial omega field may occur, as can be seen in <SUP>19</SUP>C, <SUP>15</SUP>C, and <SUP>21</SUP>C.展开更多
Efficient simulations of many-body quantum systems are generally difficult on classical computers due to the exponential resource growth with the system size, while quantum computer has been proved to complete the sam...Efficient simulations of many-body quantum systems are generally difficult on classical computers due to the exponential resource growth with the system size, while quantum computer has been proved to complete the same task effectively. In this article, we studied quantum algorithms for digital simulation of the dynamics of interacting quantum systems in real space. As an illustrative example, we concentrated on a digital quantum simulation algorithm for a two-fermion system with Coulomb interaction. We experimentally realized our algorithm on a three-qubit NMR device, and interesting phenomena such as the moving toward or against each other of particles under attractive or repulsive interaction have been clearly observed. This experiment demonstrated the very promising potential of quantum computers, even of small scale, to address the simulation of complex quantum systems.展开更多
文摘在(Quantum information Processing,2017,16,106),对于多体复合量子系统量子态,基于密度算子的迭代重排给出了多体量子态完全可分的一个必要条件。将其推广到了多体量子态相对于k体分划的情形,首先讨论了多体量子态相对于k体分划的迭代重排的定义及性质,然后基于此迭代重排的定义,给出了多体量子态k可分的一个必要条件,并通过一个例子说明该判据是有效的,其可以探测多体k不可分纠缠态。
基金Supported by the National Natural Science Foundation of China under Grant Nos.10904092,10934004,60978018,11074184,and 11074154the Zhejiang Provincial Natural Science Foundation under Grant No.Y6090001
文摘Gauge potential plays an important role in exploring exotic phenomena in the single- and many-body quantum systems.In this paper,we propose a scheme to create both new Abelian and non-Abelian gauge potentials by adiabatically controlling the degenerate Dicke model in cavity quantum electrodynamics.It is shown that a non-Abelian gauge potential is achieved only for a single atom,whereas an Abelianizen diagonal gauge potential is realized for the atomic ensemble.More importantly,two interesting quantum phenomena such as the geometric phase and the magnetic monopole induced by our created gauge potentials are also predicted.The possible physical realization is presented in the macroscopic circuit quantum electrodynamics with the Cooper pair boxes,which act as the artificial two-level atoms controlled by the gate voltage and the external magnetic flux.
文摘We study contributions of the pion meson and spatial component of the omega meson in the odd-A carbon isotopes. The pion and spatial omega provide small attractions in odd-A nuclei, giving rise to considerable influences on the single-particle energies rather than the bulk properties such as total binding energies, and root-mean-square (rms) radii. The ±? (spin) splittings, arising from the spatial omega, are large in <SUP>11</SUP>C and <SUP>13</SUP>C and drop as the isospin rises in odd-A carbon isotopes. As an isovector, the pion can shift slightly the relative potential depth of neutron and proton, contrary to the role of the rho meson. There is a general trend that both the pion and spatial omega fields reduce with the rise of isospin in the isotopic chain. From the normal nucleus to halo nucleus, an abnormal drop of the pion or spatial omega field may occur, as can be seen in <SUP>19</SUP>C, <SUP>15</SUP>C, and <SUP>21</SUP>C.
基金supported by the National Natural Science Foundation of China(11175094,91221205)the National Basic Research Program of China(2011CB921602)the Specialized Research Fund for the Doctoral Program of Education Ministry of China
文摘Efficient simulations of many-body quantum systems are generally difficult on classical computers due to the exponential resource growth with the system size, while quantum computer has been proved to complete the same task effectively. In this article, we studied quantum algorithms for digital simulation of the dynamics of interacting quantum systems in real space. As an illustrative example, we concentrated on a digital quantum simulation algorithm for a two-fermion system with Coulomb interaction. We experimentally realized our algorithm on a three-qubit NMR device, and interesting phenomena such as the moving toward or against each other of particles under attractive or repulsive interaction have been clearly observed. This experiment demonstrated the very promising potential of quantum computers, even of small scale, to address the simulation of complex quantum systems.
