This paper proposes an experimentally feasible scheme for teleportation of an unknown two-atom entangled state, where a cluster state is used as the quantum channel. This scheme does not need any joint measurement. In...This paper proposes an experimentally feasible scheme for teleportation of an unknown two-atom entangled state, where a cluster state is used as the quantum channel. This scheme does not need any joint measurement. In addition, the successful probability and fidelity of teleportation can both reach 1.0. The current scheme can be realized within the current experimental technology.展开更多
In this paper,we make use of the auxiliary equation and the expanded mapping methods to find the new exact periodic solutions for (2+1)-dimensional dispersive long wave equations in mathematical physics,which are expr...In this paper,we make use of the auxiliary equation and the expanded mapping methods to find the new exact periodic solutions for (2+1)-dimensional dispersive long wave equations in mathematical physics,which are expressed by Jacobi elliptic functions,and obtain some new solitary wave solutions (m → 1).This method can also be used to explore new periodic wave solutions for other nonlinear evolution equations.展开更多
We theoretically explore the tunability of optomechanically induced transparency(OMIT)phenomenon and fast-slow light effect in a loop-coupled hybrid optomechanical system in which two optical modes are coupled to a co...We theoretically explore the tunability of optomechanically induced transparency(OMIT)phenomenon and fast-slow light effect in a loop-coupled hybrid optomechanical system in which two optical modes are coupled to a common mechanical mode.In the probe output spectrum,we find that the interference phenomena OMIT caused by the optomechanical interactions and the normal mode splitting(NMS)induced by the strong tunnel coupling between the cavities can be observed.We further observe that the tunnel interaction will affect the distance and the heights of the sideband absorption peaks.The results also show that the switch from absorption to amplification can be realized by tuning the driving strength because of the existence of stability condition.Except from modulating the tunnel interaction,the conversion between slow light and fast light also can be achieved by adjusting the optomechanical interaction in the output field.This study may provide a potential application in the fields of high precision measurement and quantum information processing.展开更多
We have investigated the two-dimensional (2D) atom localization via probe absorption in a coherently driven four-level atomic system by means of a radio-frequency field driving a hyperfine transition. It is found that...We have investigated the two-dimensional (2D) atom localization via probe absorption in a coherently driven four-level atomic system by means of a radio-frequency field driving a hyperfine transition. It is found that the detecting probability and precision of 2D atom localization can be significantly improved via adjusting the system parameters. As a result, our scheme may be helpful in laser cooling or the atom nano-lithography via atom localization.展开更多
The entanglement property of two identical atoms,initially entangled in Bell states,coupled to a single-mode cavity is considered.Based on the reduced non-perturbative quantum master equation method,the entanglement e...The entanglement property of two identical atoms,initially entangled in Bell states,coupled to a single-mode cavity is considered.Based on the reduced non-perturbative quantum master equation method,the entanglement evolution of the two atoms with decay is investigated beyond the conventional rotating-wave approximation.We show that the counter-rotating wave terms,usually neglected,have a great influence on the disentanglement behaviour of the system.The phenomena of entanglement sudden death and entanglement sudden birth will occur.In addition,we show that the entanglement can be strengthened by introducing the dipole–dipole interaction of the two atoms.展开更多
Quantum Zeno effect with mixed initial state is studied here. Frequent projective measurements performed on a bipartite joint pure state system will result in the quantum Zeno effect on the subsystem of interest. This...Quantum Zeno effect with mixed initial state is studied here. Frequent projective measurements performed on a bipartite joint pure state system will result in the quantum Zeno effect on the subsystem of interest. This shows the existence of Quantum Zeno effect in the system with mixed initial states.展开更多
For the study of magnetic field-assisted assembly behavior,one-dimensional(1D)NiCo alloy nanostructures were solvothermally obtained at 180℃under an in situ magnetic field(the magnetic field as applied during the che...For the study of magnetic field-assisted assembly behavior,one-dimensional(1D)NiCo alloy nanostructures were solvothermally obtained at 180℃under an in situ magnetic field(the magnetic field as applied during the chemical reduction)and ex situ field(after the chemical reduction was finished).Microscopic morphology and magnetic properties differences were investigated using scanning electronic microscope(SEM)and vibrating sample magnetometer(VSM)for these products.Magnetic measurement results show that 1D ordered microstructures under in situ magnetic field possess higher saturation magnetization Ms, remnant magnetization Mr,coercivity Hc and reduced magnetization Mr/Ms than 1D ordered microstructures under ex situ field,and the four magnetic parameters of the two ordered microstructures are much higher than those randomly distributed alloy particles prepared in the absence of external magnetic field.展开更多
Quantum superdense coding (QSC) is an example of how entanglement can be used to minimize the number of carriers of classical information. This paper proposes two schemes for implementing QSC by means of cavity assist...Quantum superdense coding (QSC) is an example of how entanglement can be used to minimize the number of carriers of classical information. This paper proposes two schemes for implementing QSC by means of cavity assisted interactions with single-photon pulses. The schemes are insensitive to the cavity decay and the thermal field, thus it might be realizable based on the current cavity QED techniques.展开更多
In this paper, a scheme for generating various multiatom entangled graph states via resonant interactions is proposed. We investigate the generation of various four-atom graph states first in the ideal case and then i...In this paper, a scheme for generating various multiatom entangled graph states via resonant interactions is proposed. We investigate the generation of various four-atom graph states first in the ideal case and then in the case in which the cavity decay and atomic spontaneous emission are taken into consideration in the process of interaction. More importantly, we improve the possible distortion of the graph states coming from cavity decay and atomic spontaneous emission by performing appropriate unitary transforms on atoms. The generation of multiatom entangled graph states is very important for constructing quantum one-way computer in a fault-tolerant manner. The resonant interaction time is very short, which is important in the sense of decoherence. Our scheme is easy and feasible within the reach of current experimental technology.展开更多
基金Project supported by Anhui Provincial Natural Science Foundation, China （Grant No 03042401）, the Key Program of the Education Department of Anhui Province, China （Grant Nos 2002kj029zd and 2006kj070A）, and the Talent Foundation of Anhui University, China. 0ne of the authors, Xue Zheng-Yuan, is also supported by the Postgraduate Innovation Research Plan from Anhui university, China.
基金The project supported by the National Natural Science Foundation of China under Grant No. 60678022, the Key Program of the Education Department of Anhui Province under Grant Nos. 2006KJ070A, 2006KJ057B and the Talent Foundation of Anhui University
基金Supported by the National Natural Science Foundation of China under Grant Nos 60678022 and 10704001, the Specialized Research Fund for the Doctoral Programme of Higher Education of China under Grant No 20060357008, Anhui Provincial Natural Science Foundation under Grant No 070412060, the Key Programme of the Education Department of Anhui Province under Grant No 2006KJ070A, the Talent Foundation Of Anhui University, and Anhui Key Laboratory of Information Materials and Devices （Anhui University）.
文摘我们在 Tavis-Cummings 模型与起始的分成三部分的纠缠的象 W 一样状态学习二个原子的纠纷动力学。我们发现纠纷发展不仅对起始的状态的纠纷度而且到起始的状态的具体形式敏感。所谓的突然的死亡效果仅仅为一些起始的状态发生。
基金Project supported by the National Natural Science Foundation of China (Grant No 60678022)the Doctoral Fund of Ministry of Education of China (Grant No 20060357008)+2 种基金the Key Program of the Education Department of Anhui Province, China (Grant No 2006KJ070A)the Program of the Education Department of Anhui Province, China (Grant No 2006KJ057B)the Talent Foundation of Anhui University, China, Anhui Key Laboratory of Information Materials and Devices, China (Anhui University)
文摘This paper proposes an experimentally feasible scheme for teleportation of an unknown two-atom entangled state, where a cluster state is used as the quantum channel. This scheme does not need any joint measurement. In addition, the successful probability and fidelity of teleportation can both reach 1.0. The current scheme can be realized within the current experimental technology.
基金Project supported by the Anhui Key Laboratory of Information Materials and Devices (Anhui University),China
文摘In this paper,we make use of the auxiliary equation and the expanded mapping methods to find the new exact periodic solutions for (2+1)-dimensional dispersive long wave equations in mathematical physics,which are expressed by Jacobi elliptic functions,and obtain some new solitary wave solutions (m → 1).This method can also be used to explore new periodic wave solutions for other nonlinear evolution equations.
基金Supported by the National Natural Science Foundation of China under Grant Nos 60678022 and 10704001, the Specialized Research Pund for the Doctoral Program of Higher Education under Grant No 20060357008, the Key Program of the Education Department of Anhui Province under Grant Nos KJ2009A048Z, the Talent Project of the Anhui Province for Outstanding Youth under Grant Nos 2010SQRL153ZD and 2010SQRL187.
基金Project supported by the National Natural Science Foundation of China(Grant No.62061028)the Foundation for Distinguished Young Scientists of Jiangxi Province,China(Grant No.20162BCB23009)+2 种基金the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics(Grant No.KF202010)the Interdisciplinary Innovation Fund of Nanchang University(Grant No.9166-27060003-YB12)the Open Research Fund Program of the Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education(Grant No.OEIAM202004).
文摘We theoretically explore the tunability of optomechanically induced transparency(OMIT)phenomenon and fast-slow light effect in a loop-coupled hybrid optomechanical system in which two optical modes are coupled to a common mechanical mode.In the probe output spectrum,we find that the interference phenomena OMIT caused by the optomechanical interactions and the normal mode splitting(NMS)induced by the strong tunnel coupling between the cavities can be observed.We further observe that the tunnel interaction will affect the distance and the heights of the sideband absorption peaks.The results also show that the switch from absorption to amplification can be realized by tuning the driving strength because of the existence of stability condition.Except from modulating the tunnel interaction,the conversion between slow light and fast light also can be achieved by adjusting the optomechanical interaction in the output field.This study may provide a potential application in the fields of high precision measurement and quantum information processing.
基金The project supported by the Natural Science Foundation of the Education Department of Anhui Province under Grant Nos. 2006kj070A and 2006kj057B, and the Talent Foundation of Anhui University
基金the National Natural Science Foundation of China(Grant No.11205001)the National Basic Research Program of China(Grant No.2010CB234607)the Postdoctoral Science Foundation of Anhui University,China
文摘We have investigated the two-dimensional (2D) atom localization via probe absorption in a coherently driven four-level atomic system by means of a radio-frequency field driving a hyperfine transition. It is found that the detecting probability and precision of 2D atom localization can be significantly improved via adjusting the system parameters. As a result, our scheme may be helpful in laser cooling or the atom nano-lithography via atom localization.
基金Supported by National Natural Science Foundation of China under Grant Nos. 60678022 and 10704001the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No. 20060357008+2 种基金Anhui Provincial Natural Science Foundation under Grant No. 070412060the Key Program of the Education Department of Anhui Province under Grant Nos.KJ2008A28ZC,KJ2008B265,KJ2009A048Z, 2010SQRLI53ZD, and 2008JQI183the Talent Foundation of Anhui University and Anhui Key Laboratory of Information Materials and Devices (Anhui University)
基金Project supported by the National Natural Science Foundation of China (Grant Nos 60678022 and 10704001)the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No 20060357008)+2 种基金Anhui Provincial Natural Science Foundation of China (Grant No 070412060)the Key Program of the Education Department of Anhui Province of China (Grant No KJ2008A28ZC)Anhui Key Laboratory of Information Materials and Devices (Anhui University of China)
文摘The entanglement property of two identical atoms,initially entangled in Bell states,coupled to a single-mode cavity is considered.Based on the reduced non-perturbative quantum master equation method,the entanglement evolution of the two atoms with decay is investigated beyond the conventional rotating-wave approximation.We show that the counter-rotating wave terms,usually neglected,have a great influence on the disentanglement behaviour of the system.The phenomena of entanglement sudden death and entanglement sudden birth will occur.In addition,we show that the entanglement can be strengthened by introducing the dipole–dipole interaction of the two atoms.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10704001 and 60678022, the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No 20060357008, Anhui Provincial Natural Science Foundation under Grant No 070412060, the Key Program of the Education Department of Anhui Province under Grant Nos KJ2008B265, 2008jq1183 and KJ2008A28ZC, and the Talent Foundation of Anhui University. We would like to thank Dr. Zheng-Yuan Xue for careful reading of the initial version of the manuscript.
基金Supported by the National Natural Science Foundation of China under Grant No 10704001, the Major Program of the Education Department of Anhui Province under Grant No KJ2OIOZD08, the Personal Development Foundation of Anhui Province under Grant No 2009Z022, the Key Program of the Education Department of Anhui Province under Grant Nos KJ2008B265, KJ2010A287 and KJ2009A048Z, Talent Project of the Anhui Province for Outstanding Youth under Grant Nos 2010SQRL153ZD and 2010SQRL187, the Talent Foundation of Anhui University under Grant No 02303103, and Anhui Key Laboratory of Information Materials and Devices （Anhui University）.
基金Supported by National Natural Science Foundation of China under Grant Nos. 10704001, 61073048, and 11005029the Key Project of Chinese Ministry of Education under Grant No. 210092+2 种基金the Key Program of the Education Department of Anhui Province under Grant Nos. KJ2008A28ZC, 2010SQRL153ZD, and KJ2010A287the "211" Project of Anhui University, the Personnel Department of Anhui ProvinceAnhui Key Laboratory of Information Materials and Devices Anhui University
文摘Quantum Zeno effect with mixed initial state is studied here. Frequent projective measurements performed on a bipartite joint pure state system will result in the quantum Zeno effect on the subsystem of interest. This shows the existence of Quantum Zeno effect in the system with mixed initial states.
基金Project(50901074)supported by the National Natural Science Foundation of ChinaProject(20080430778)supported by ChinaPostdoctoral Science FoundationProject(2008jq1002)supported by Young Teacher Natural Science Fundation of Anhui Province,China
文摘For the study of magnetic field-assisted assembly behavior,one-dimensional(1D)NiCo alloy nanostructures were solvothermally obtained at 180℃under an in situ magnetic field(the magnetic field as applied during the chemical reduction)and ex situ field(after the chemical reduction was finished).Microscopic morphology and magnetic properties differences were investigated using scanning electronic microscope(SEM)and vibrating sample magnetometer(VSM)for these products.Magnetic measurement results show that 1D ordered microstructures under in situ magnetic field possess higher saturation magnetization Ms, remnant magnetization Mr,coercivity Hc and reduced magnetization Mr/Ms than 1D ordered microstructures under ex situ field,and the four magnetic parameters of the two ordered microstructures are much higher than those randomly distributed alloy particles prepared in the absence of external magnetic field.
基金Project supported by the National Natural Science Foundation of China (Grant Nos 60678022 and 10704001)the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No 20060357008)+2 种基金Anhui Provincial Natural Science Foundation (Grant No 070412060)the Talent Foundation of Anhui UniversityAnhui Key Laboratory of Information Materials and Devices (Anhui University)
文摘Quantum superdense coding (QSC) is an example of how entanglement can be used to minimize the number of carriers of classical information. This paper proposes two schemes for implementing QSC by means of cavity assisted interactions with single-photon pulses. The schemes are insensitive to the cavity decay and the thermal field, thus it might be realizable based on the current cavity QED techniques.
基金The project supported by National Natural Science Foundation of China(NSFC)under Grant Nos.60678022 and 10704001the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20060357008+2 种基金Natural Science Foundation of Anhui Province under Grant No.070412060the Key Program of the Education Department of Anhui Province under Grant No.2006KJ070Athe Talent Foundation of Anhui University,and Anhui Key Laboratory of Information Materials and Devices(Anhui University)
基金National Natural Science Foundation of China under Grant Nos.60678022 and 1070400the Specialized Research Fund for the Doctoral Program of Higher Education of China under Grant No.20060357008+3 种基金Natural Science Foundation of Anhui Province under Grant No.070412060the Key Program of the Education Department of Anhui Province under Grant No.2006KJ070AThe Talent Foundation of Anhui UniversityAnhui Key Laboratory of Information Materials and Devices (Anhui University)
基金Project supported by the National Natural Science Foundation of China (Grant Nos 60678022 and 10704001)the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No 20060357008)+2 种基金Anhui Provincial Natural Science Foundation, China (Grant No 070412060)the Key Program of the Education Department of Anhui Province, China (Grant Nos KJ2008A28ZC, KJ2008B83ZC, KJ2008B265 and KJ2007B082)the Talent Foundation of Anhui University, China,and the Anhui Key Laboratory of Information Materials and Devices (Anhui University), China
文摘In this paper, a scheme for generating various multiatom entangled graph states via resonant interactions is proposed. We investigate the generation of various four-atom graph states first in the ideal case and then in the case in which the cavity decay and atomic spontaneous emission are taken into consideration in the process of interaction. More importantly, we improve the possible distortion of the graph states coming from cavity decay and atomic spontaneous emission by performing appropriate unitary transforms on atoms. The generation of multiatom entangled graph states is very important for constructing quantum one-way computer in a fault-tolerant manner. The resonant interaction time is very short, which is important in the sense of decoherence. Our scheme is easy and feasible within the reach of current experimental technology.
基金Supported by the National Natural Science Foundation of China under Grant No 60678022, the Doctoral Fund of Ministry of Education of China under Grant No 20060357008, the Programme of the Education Department of Anhui Province under Grant Nos 2006KJ070A and 2006KJ057B, and the Talent Foundation of Anhui University.
