Nonlinearly induced steady-state photon–phonon entanglement of a dissipative coupled system is studied in the bistable regime. Quantum dynamical characteristics are analysed by solving the mean-field and fluctuation ...Nonlinearly induced steady-state photon–phonon entanglement of a dissipative coupled system is studied in the bistable regime. Quantum dynamical characteristics are analysed by solving the mean-field and fluctuation equations of the system. It is shown that dissipative coupling can induce bistable behaviour for the effective dissipation of the system.Under suitable parameters, one of the steady states significantly reduces the dissipative effect of the system. Consequently,a larger steady-state entanglement can be achieved compared to linear dynamics. Furthermore, the experimental feasibility of the parameters is analysed. Our results provide a new perspective for the implementation of steady-state optomechanical entanglement.展开更多
A nonlocal circulator protocol is proposed in a hybrid optomechanical system.By analogy with quantum communication,using the input-output relationship,we establish the quantum channel between two optical modes with lo...A nonlocal circulator protocol is proposed in a hybrid optomechanical system.By analogy with quantum communication,using the input-output relationship,we establish the quantum channel between two optical modes with long-range.The three-body nonlocal interaction between the cavity and the two oscillators is obtained by eliminating the optomechanical cavity mode and verifying the Bell-CHSH inequality of continuous variables.By introducing the phase accumulation between cyclic interactions,the unidirectional transmission of quantum state between the optical mode and two mechanical modes is achieved.The results show that nonreciprocal transmissions are achieved as long as the accumulated phase reaches a certain value.In addition,the effective interaction parameters in our system are amplified,which reduces the difficulty of the implementation of our protocol.Our research can provide potential applications for nonlocal manipulation and transmission control of quantum platforms.展开更多
The quantum state transfer between two membranes in coupled cavities is studied when the system is surrounded by non-Markovian environments. An analytical approach for describing non-Markovian memory effects that impa...The quantum state transfer between two membranes in coupled cavities is studied when the system is surrounded by non-Markovian environments. An analytical approach for describing non-Markovian memory effects that impact on the state transfer between distant membranes is presented. We show that quantum state transfer can be implemented with high efficiency by utilizing the experimental spectral density, and the performance of state transfer in non-Markovian environments is much better than that in Markovian environments, especially when the tunneling strength between the two cavities is not very large.展开更多
We study the quantum Fisher information(QFI)of the angular velocity of rotation in an optomechanical system.Based on the Gaussian measurements method,we derive the explicit form of a single-mode Gaussian QFI,which is ...We study the quantum Fisher information(QFI)of the angular velocity of rotation in an optomechanical system.Based on the Gaussian measurements method,we derive the explicit form of a single-mode Gaussian QFI,which is valid for arbitrary angular velocity of rotation.The information about the angular velocity to be measured is contained in the optical covariance matrix,which can be experimentally determined via homodyne measurement.We find that QFI increases rapidly when driving the system close to the unstable boundary.This result can be attributed to the strong nonlinearity of the system at the unstable boundary.Our results indicate the possibility of using an optomechanical system for high precision detection of the angular velocity of rotation.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 12074206)the Natural Science Foundation of Zhejiang Province of China (Grant No.LY22A040005)supported by the National Natural Science Foundation of China (Grant No. 22103043)。
文摘Nonlinearly induced steady-state photon–phonon entanglement of a dissipative coupled system is studied in the bistable regime. Quantum dynamical characteristics are analysed by solving the mean-field and fluctuation equations of the system. It is shown that dissipative coupling can induce bistable behaviour for the effective dissipation of the system.Under suitable parameters, one of the steady states significantly reduces the dissipative effect of the system. Consequently,a larger steady-state entanglement can be achieved compared to linear dynamics. Furthermore, the experimental feasibility of the parameters is analysed. Our results provide a new perspective for the implementation of steady-state optomechanical entanglement.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.12061023,12074206,11704026,11704205,11704042,and 11847128)K.C.Wong Magna Fund in Ningbo University,China。
文摘A nonlocal circulator protocol is proposed in a hybrid optomechanical system.By analogy with quantum communication,using the input-output relationship,we establish the quantum channel between two optical modes with long-range.The three-body nonlocal interaction between the cavity and the two oscillators is obtained by eliminating the optomechanical cavity mode and verifying the Bell-CHSH inequality of continuous variables.By introducing the phase accumulation between cyclic interactions,the unidirectional transmission of quantum state between the optical mode and two mechanical modes is achieved.The results show that nonreciprocal transmissions are achieved as long as the accumulated phase reaches a certain value.In addition,the effective interaction parameters in our system are amplified,which reduces the difficulty of the implementation of our protocol.Our research can provide potential applications for nonlocal manipulation and transmission control of quantum platforms.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11704205,11704026,21773131,and 11574167)China Postdoctoral Science Foundation(Grant No.2018M632437)+1 种基金the Natural Science Foundation of Ningbo City(Grant No.2018A610199)K C Wong Magna Fund in Ningbo University,China
文摘The quantum state transfer between two membranes in coupled cavities is studied when the system is surrounded by non-Markovian environments. An analytical approach for describing non-Markovian memory effects that impact on the state transfer between distant membranes is presented. We show that quantum state transfer can be implemented with high efficiency by utilizing the experimental spectral density, and the performance of state transfer in non-Markovian environments is much better than that in Markovian environments, especially when the tunneling strength between the two cavities is not very large.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11704205 and 12074206)the National Natural Science Foundation of Zhejiang Province(Grant No.LY22A040005)K.C.Wong Magna Fund in Ningbo University。
文摘We study the quantum Fisher information(QFI)of the angular velocity of rotation in an optomechanical system.Based on the Gaussian measurements method,we derive the explicit form of a single-mode Gaussian QFI,which is valid for arbitrary angular velocity of rotation.The information about the angular velocity to be measured is contained in the optical covariance matrix,which can be experimentally determined via homodyne measurement.We find that QFI increases rapidly when driving the system close to the unstable boundary.This result can be attributed to the strong nonlinearity of the system at the unstable boundary.Our results indicate the possibility of using an optomechanical system for high precision detection of the angular velocity of rotation.
