The which-path micromaser detector and the associated quantum eraser are proposed based on the interactions of atoms with a cavity placed in front of one of the double slits in an atomic interferometer.In recent years...The which-path micromaser detector and the associated quantum eraser are proposed based on the interactions of atoms with a cavity placed in front of one of the double slits in an atomic interferometer.In recent years,much attention has been paid to the demonstration of Bohr complementarity1 in quantum optics.展开更多
A scheme is presented for preparing multi-atom entangled states based on the Raman atom-cavity-field interaction.After several degenerate Λ-type three-level atoms interact with an appropriately prepared single-mode c...A scheme is presented for preparing multi-atom entangled states based on the Raman atom-cavity-field interaction.After several degenerate Λ-type three-level atoms interact with an appropriately prepared single-mode cavity field through Raman coupling,a two-level atom,resonant with the cavity,is sent through the cavity and a Ramsey zone.The detection of the two-level atom leaves the Λ-type atoms in an entangled state.展开更多
We propose a scheme for teleporting a three-particle entangled Greenberger-Horne-Zeilinger state to three distant users.The scheme operates essentially through the sharing of Einstein-Podolsky-Rosen pairs followed by ...We propose a scheme for teleporting a three-particle entangled Greenberger-Horne-Zeilinger state to three distant users.The scheme operates essentially through the sharing of Einstein-Podolsky-Rosen pairs followed by only local measurements and unitary operations.It can be regarded as a method for generating the entanglement of particles distributed in a communication network.展开更多
Continuous measurement theory is generalized to inhomogeneous case via the Wigner function. Applying it to two independent condensates shows that a relative phase builds up via the measurement at the expense of a decr...Continuous measurement theory is generalized to inhomogeneous case via the Wigner function. Applying it to two independent condensates shows that a relative phase builds up via the measurement at the expense of a decrease of the interference pattern visibility. A general pattern depending on the wave functions of the condensates is provided which can be applied to other nonlocal quantum system.展开更多
A scheme to prepare superpositions of squeezed coherent states is presented.It involves an appropriately prepared atom crossing a high-Q cavity initially filled with a squeezed coherent field.After the nonresonant int...A scheme to prepare superpositions of squeezed coherent states is presented.It involves an appropriately prepared atom crossing a high-Q cavity initially filled with a squeezed coherent field.After the nonresonant interaction with the cavity field the detection of the atomic state leaves the cavity field in a superposition of two squeezed coherent states.展开更多
A scheme of quantum nondemolition(QND)measurement is proposed for phonons in a Raman-active crystal by using a beam of squeezed Stokes light.The results of the theoretical calculation show that the QND measurements fo...A scheme of quantum nondemolition(QND)measurement is proposed for phonons in a Raman-active crystal by using a beam of squeezed Stokes light.The results of the theoretical calculation show that the QND measurements for the quadrature component of the phonons can be performed.展开更多
A scheme to generate superpositions of coherent states with variable amplitudes,phases and weighting factors is proposed.It provides experimental possibility for preparing an arbitrary Schrödinger cat state.
We present a scheme to realize a photon switch for controlling the state of the field in a cavity between a coherent state and a Schrödinger cat state.In the scheme,an atom crosses two cavities continually.The at...We present a scheme to realize a photon switch for controlling the state of the field in a cavity between a coherent state and a Schrödinger cat state.In the scheme,an atom crosses two cavities continually.The atom is resonant with the first cavity mode,and off-resonant with the second cavity mode.The detection of the atomic state leaves the two cavity modes in an entangled state.We can determine whether the second cavity field is in a coherent state or in a Schrödinger cat state via the detection of the photon in the first cavity.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.69438010.
文摘The which-path micromaser detector and the associated quantum eraser are proposed based on the interactions of atoms with a cavity placed in front of one of the double slits in an atomic interferometer.In recent years,much attention has been paid to the demonstration of Bohr complementarity1 in quantum optics.
基金Supported by the National Natural Science Foundation of China under Grant No.19474044.
文摘A scheme is presented for preparing multi-atom entangled states based on the Raman atom-cavity-field interaction.After several degenerate Λ-type three-level atoms interact with an appropriately prepared single-mode cavity field through Raman coupling,a two-level atom,resonant with the cavity,is sent through the cavity and a Ramsey zone.The detection of the two-level atom leaves the Λ-type atoms in an entangled state.
基金the National Natural Science Foundation of China under Grant No.19874056the Doctoral Education Fund of the State Education Commission of China.
文摘We propose a scheme for teleporting a three-particle entangled Greenberger-Horne-Zeilinger state to three distant users.The scheme operates essentially through the sharing of Einstein-Podolsky-Rosen pairs followed by only local measurements and unitary operations.It can be regarded as a method for generating the entanglement of particles distributed in a communication network.
基金the National Natural Science Foundation of China under Grant No.19874056.
文摘Continuous measurement theory is generalized to inhomogeneous case via the Wigner function. Applying it to two independent condensates shows that a relative phase builds up via the measurement at the expense of a decrease of the interference pattern visibility. A general pattern depending on the wave functions of the condensates is provided which can be applied to other nonlocal quantum system.
基金Supported by the National Natural Science Foundation of China under Grant No.19474044.
文摘A scheme to prepare superpositions of squeezed coherent states is presented.It involves an appropriately prepared atom crossing a high-Q cavity initially filled with a squeezed coherent field.After the nonresonant interaction with the cavity field the detection of the atomic state leaves the cavity field in a superposition of two squeezed coherent states.
基金Supported by the National Natural Science Foundation of China under Grant No.19474044.
文摘A scheme of quantum nondemolition(QND)measurement is proposed for phonons in a Raman-active crystal by using a beam of squeezed Stokes light.The results of the theoretical calculation show that the QND measurements for the quadrature component of the phonons can be performed.
基金Supported by the National Natural Science Foundation of China under Grant No.69438010.
文摘A scheme to generate superpositions of coherent states with variable amplitudes,phases and weighting factors is proposed.It provides experimental possibility for preparing an arbitrary Schrödinger cat state.
基金Supported by the National Natural Science Foundation of China.
文摘We present a scheme to realize a photon switch for controlling the state of the field in a cavity between a coherent state and a Schrödinger cat state.In the scheme,an atom crosses two cavities continually.The atom is resonant with the first cavity mode,and off-resonant with the second cavity mode.The detection of the atomic state leaves the two cavity modes in an entangled state.We can determine whether the second cavity field is in a coherent state or in a Schrödinger cat state via the detection of the photon in the first cavity.
