搜索结果: 1-15 共查到“光学 state”相关记录22条 . 查询时间(0.127 秒)
A simple scheme for realizing four-photon GHZ state based on cavity quantum electrodynamics
量子光学 GHZ态 阶梯型三能级原子 双模腔
2012/3/31
提出一种利用阶梯型三能级原子与两个双模腔谐振相互作用制备四光子GHZ态的方案。在该方案中，量子信息编码在腔场的虎克态中。通过求解薛定谔方程，得到相互作用系统的量子态。原子通过两个腔后被测量时，场能崩塌到所需要的GHZ态。结果表明该方案简单且实验上可行。
Weaving independently generated photons into an arbitrary graph state
Weaving independently generated photons arbitrary graph state
2013/7/3
The controlled-Z ( CZ) operations acting separately on pairs of qubits are commonly adopted in the schemes of generating graph states, the multipartite entangled states for the one-way quantum computi...
Progress towards fabrication of Th:229-doped high energy band-gap crystals for use as a solid-state optical frequency reference
Th:229-doped high energy band-gap crystals solid-state optical frequency
2010/11/12
We have recently described a novel method for the construction of a solid-state optical frequency reference based on doping $^{229}$Th into high energy band-gap crystals. Since nuclear transitions ar...
Measurement of $e^+e^-\to D_s^{(*)+} D_s^{(*)-}$ cross sections near threshold using initial-state radiation
$e^+e^-\to D_s^{(*)+} D_s^{(*)-}$ cross sections threshold initial-state radiation
2011/1/4
We report a measurement of exclusive e+e− ! D()+s D()− s cross sections as a function of center-of-mass energy near D()+ s D()− s threshold with initial-state radiation. The anal...
Normal state resistivity of Ba$_{1-x}$K$_x$Fe$_2$As$_2$: evidence for multiband strong-coupling behavior
Normal state resistivity multiband strong-coupling behavior
2010/11/19
We present theoretical analysis of the normal state resistivity in multiband superconductors in the framework of Eliashberg theory. The results are compared with measurements of the temperature depend...
A Single Laser System for Ground State Cooling of 25-Mg+
Single Laser System Ground State Cooling 25-Mg+
2010/11/9
We present a single solid-state laser system to cool, coherently manipulate and detect $^{25}$Mg$^+$ ions. Coherent manipulation is accomplished by coupling two hyperfine ground state levels using a p...
Experimental extraction of secure correlations from a photonic private state
Experimental extraction of secure correlations from a photonic private state
2010/11/8
Photonic entanglement is a vital resource for quantum key distribution (QKD) of Ekert's protocol, where the random key obtained from a maximally entangled state is known exclusively to legitimate user...
Fock-state view of weak-value measurements and implementation with photons and atomic ensembles
Fock-state view weak-value measurements implementation photons atomic ensembles
2010/11/5
Weak measurements in combination with post-selection can give rise to a striking amplification effect (related to a large "weak value"). We show that this effect can be understood by viewing the initi...
Coherent optical writing and reading of the exciton spin state in single quantum dots
Coherent optical writing reading exciton spin state single quantum dots
2010/10/21
We demonstrate a one to one correspondence between the polarization state of a light pulse tuned to excitonic resonances of single semiconductor quantum dots and the spin state of the exciton that it ...
New 3-mode squeezing operator and squeezed vacuum state in 3-wave mixing
New 3-mode squeezing operator squeezed vacuum state 3-wave mixing
2010/10/19
In a 3-wave mixing process occurring in some nonlinear optical medium when a† 1mode interacts
with both a† 2mode and a† 3mode, we theoretically study the squeezing effect generated ...
The log of a quantum state and qubit local unitary invariants
log quantum state qubit local unitary invariants
2010/10/19
Local unitary invariants of multipartite states fall into families related by the tracing-out of subsystems. In the case of pure qubit systems, there is a family that accounts for about half the total...
Distillation of mixed-state continuous-variable entanglement by photon subtraction
Distillation mixed-state continuous-variable entanglement photon subtraction
2010/10/21
We present a detailed theoretical analysis for the distillation of one copy of a mixed two-mode
continuous-variable entangled state using beamsplitters and coherent photon-detection techniques,includ...
Fast ground-state cooling of mechanical resonators with time-dependent optical cavities
Fast ground-state cooling mechanical resonators time-dependent optical cavities
2014/5/28
We propose a feasible scheme to cool down a mechanical resonator (MR) in a three-mirror cavity optomechanical system with controllable external optical driving fields. Under the Born-Oppenheimer appro...
Bidirectional Mapping between a Biphoton Polarization State and a Single-Photon Two-Qubit State
Bidirectional Mapping Biphoton Polarization State Single-Photon Two-Qubit State
2013/7/2
How to manipulate (operate or measure) single photons efficiently and simply is the basic problem in optical quantum information processing. We first present an efficient scheme to transform a biphoto...
The Coulomb solution as a coherent state of unphysical photons
Coulomb solution coherent state unphysical photons
2010/3/17
In the context of the problem of what micro-states are responsible for the entropy of black holes, we consider as a physical toy model the electromagnetic Coulomb solution. By quantizing the electroma...