We put forward a scheme for preparation of an entangled multiparty W state between different modes of radiation field inside high-Q cavity QED. Our scheme is based on the interaction of a two-level atom with the cavit...We put forward a scheme for preparation of an entangled multiparty W state between different modes of radiation field inside high-Q cavity QED. Our scheme is based on the interaction of a two-level atom with the cavity field with the assistance of a strong classical driving field for precalculated interaction time. In principle, the scheme can be extended to prepare an N-party W state. The required experimental techniques are within the scope of what can be obtained in the microwave cavity QED setup.展开更多
The potential for nonlinear conversion between two laser pulses in a three-level V-type medium with assistance of an auxiliary microwave resonant radiation is studied. The results show that microwave driven field can ...The potential for nonlinear conversion between two laser pulses in a three-level V-type medium with assistance of an auxiliary microwave resonant radiation is studied. The results show that microwave driven field can lead to the parametric generation of a new laser pulse with high conversion efficieney when a weak pump laser pulse is applied.展开更多
Taking the intensity-dependent coupling between atoms and cavity mode into account, we investigate a system consisting of N homogeneously broadened two-level atoms interacting with the field inside a single-mode Fabry...Taking the intensity-dependent coupling between atoms and cavity mode into account, we investigate a system consisting of N homogeneously broadened two-level atoms interacting with the field inside a single-mode Fabry- Perot cavity containing a nonlinear Kerr-like medium. We derive the steady-state bistable behaviour of the system, and further analyse in details the influence of several critical parameters on the bistable behaviour.展开更多
A composite system consisting of a degenerate optical parametric oscillator （DOPO） and N two-level atoms interacting with a broadband squeezed vacuum （SV） centred at frequency cas and an input monochromatic pumpin...A composite system consisting of a degenerate optical parametric oscillator （DOPO） and N two-level atoms interacting with a broadband squeezed vacuum （SV） centred at frequency cas and an input monochromatic pumping field with a frequency ωp is analysed. The corresponding explicit analytical steady-state solutions in the central mode ωp = ωs are derived, and the result displays optical bistability （OB）. In addition, the influence of the broadband SV on the bistable behaviour is analysed in detail.展开更多
The cytosolic calcium system is inhomogenous because of the discrete and random distribution of ion channels on the ER membrane.It is well known that the spiral tip can be pinned by the heterogenous area,and the field...The cytosolic calcium system is inhomogenous because of the discrete and random distribution of ion channels on the ER membrane.It is well known that the spiral tip can be pinned by the heterogenous area,and the field can detach the spiral from the heterogeneity.We use the adventive field to counteract the attractive force exerting on the calcium spiral wave by the heterogeneity,then the strength of the adventive field is used to quantify the attractive force indirectly.Two factors determining the attractive force are studied.It is found that:(1)the attractive force sharply increases with size of the heterogeneity for small-size heterogeneity,whereas the force increases to a saturated value for large-size heterogeneity;(2)for large-size heterogeneity,the force almost remains constant unless the level of the heterogeneity vanishes,the force decreases to zero linearly and sharply,and for small-size heterogeneity,the force decreases successively with the level of the heterogeneity.Furthermore,it is found that the forces exist only when the spiral tip is very close to the heterogenous area.Our study may shed some light on the control or suppression of the calcium spiral wave.展开更多
We theoreticMly investigate the response of the probe amplification in a five-level atomlc system m the presence of interacting double-dark resonances disturbed by introducing an additional signal field. It is found t...We theoreticMly investigate the response of the probe amplification in a five-level atomlc system m the presence of interacting double-dark resonances disturbed by introducing an additional signal field. It is found that a large enhancement of the probe amplification with or without population inversion can be achieved by properly adjusting the strengths of the microwave driving field and the signal laser field. From viewpoint of physics, we qualitatively explain these results in terms of quantum interference and dressed states.展开更多
In a diverse and delayed small-world neuronal network,we have identified the oscillatory-like synchronization transition between anti-phase and complete synchronization[Phys.Rev.E 83(2011)046207].Here we study the inf...In a diverse and delayed small-world neuronal network,we have identified the oscillatory-like synchronization transition between anti-phase and complete synchronization[Phys.Rev.E 83(2011)046207].Here we study the influence of the network topology and noise on the synchronization transition.The robustness of this transition is investigated.The results show that:(i)the synchronization transition is robust to the neuron number N in the network;(ii)only when the coupled neighbor number k is in the region[4,10],does the synchronization transition exist;(iii)to some extent,the synchronization is destroyed by noise and the oscillatory−like synchronization transition exists for relatively weak noise(D<0.003).展开更多
基金Supported in part by the National Natural Science Foundation of China Under Grant No 60478029.
文摘We put forward a scheme for preparation of an entangled multiparty W state between different modes of radiation field inside high-Q cavity QED. Our scheme is based on the interaction of a two-level atom with the cavity field with the assistance of a strong classical driving field for precalculated interaction time. In principle, the scheme can be extended to prepare an N-party W state. The required experimental techniques are within the scope of what can be obtained in the microwave cavity QED setup.
基金Project supported in part by the National Natural Science Foundation of China （Grant Nos 60478029 and 10575040）.
文摘The potential for nonlinear conversion between two laser pulses in a three-level V-type medium with assistance of an auxiliary microwave resonant radiation is studied. The results show that microwave driven field can lead to the parametric generation of a new laser pulse with high conversion efficieney when a weak pump laser pulse is applied.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10575040 and 90503010.
文摘Taking the intensity-dependent coupling between atoms and cavity mode into account, we investigate a system consisting of N homogeneously broadened two-level atoms interacting with the field inside a single-mode Fabry- Perot cavity containing a nonlinear Kerr-like medium. We derive the steady-state bistable behaviour of the system, and further analyse in details the influence of several critical parameters on the bistable behaviour.
基金Project supported in part by the National Natural Science Foundation of China （Grant Nos 10125419 and 60478029）.
文摘A composite system consisting of a degenerate optical parametric oscillator （DOPO） and N two-level atoms interacting with a broadband squeezed vacuum （SV） centred at frequency cas and an input monochromatic pumping field with a frequency ωp is analysed. The corresponding explicit analytical steady-state solutions in the central mode ωp = ωs are derived, and the result displays optical bistability （OB）. In addition, the influence of the broadband SV on the bistable behaviour is analysed in detail.
基金Supported by the Fundamental Research Funds for the Central Universities of China under Grant No 2010QNA36the National Natural Science Foundation of China under Grant Nos 11105219(JT)and 11265008(JM).
文摘The cytosolic calcium system is inhomogenous because of the discrete and random distribution of ion channels on the ER membrane.It is well known that the spiral tip can be pinned by the heterogenous area,and the field can detach the spiral from the heterogeneity.We use the adventive field to counteract the attractive force exerting on the calcium spiral wave by the heterogeneity,then the strength of the adventive field is used to quantify the attractive force indirectly.Two factors determining the attractive force are studied.It is found that:(1)the attractive force sharply increases with size of the heterogeneity for small-size heterogeneity,whereas the force increases to a saturated value for large-size heterogeneity;(2)for large-size heterogeneity,the force almost remains constant unless the level of the heterogeneity vanishes,the force decreases to zero linearly and sharply,and for small-size heterogeneity,the force decreases successively with the level of the heterogeneity.Furthermore,it is found that the forces exist only when the spiral tip is very close to the heterogenous area.Our study may shed some light on the control or suppression of the calcium spiral wave.
基金Supported in part by the National Natural Science Foundation of China under Grant No 10575040.
文摘We theoreticMly investigate the response of the probe amplification in a five-level atomlc system m the presence of interacting double-dark resonances disturbed by introducing an additional signal field. It is found that a large enhancement of the probe amplification with or without population inversion can be achieved by properly adjusting the strengths of the microwave driving field and the signal laser field. From viewpoint of physics, we qualitatively explain these results in terms of quantum interference and dressed states.
基金Supported by the Fundamental Research Funds for the Central Universities of China under Grant Nos.2010QNA36 and 2010LKWL10.
文摘In a diverse and delayed small-world neuronal network,we have identified the oscillatory-like synchronization transition between anti-phase and complete synchronization[Phys.Rev.E 83(2011)046207].Here we study the influence of the network topology and noise on the synchronization transition.The robustness of this transition is investigated.The results show that:(i)the synchronization transition is robust to the neuron number N in the network;(ii)only when the coupled neighbor number k is in the region[4,10],does the synchronization transition exist;(iii)to some extent,the synchronization is destroyed by noise and the oscillatory−like synchronization transition exists for relatively weak noise(D<0.003).
