Publisher's Note: Experimental high-intensity three-photon entangled source [Phys. Rev. A78, 033819 (2008)]

High-visibility nonclassical interference between intrinsically pure heralded single photons and photons from a weak coherent field

“…Many subareas of quantum information processing [3,6,7,[24][25][26][27][28][29][30] require nonclassical interference of photons from independent sources. Traditionally in these experiments, spectral filtering has been utilized to improve visibility at the expense of decreasing event efficiency.…”

Distributed Qutrit—Qutrit Entanglement through Laser-Driven Resonant Interaction

“…Let us stress that the laserdriven resonant interaction discussed here possesses the advantage of requiring a very short interaction time. Compared with the schemes through adiabatic passage, [18] virtual-excitation processes, [19,20] or even quantum Zeno dynamics, [21] the time required in the present scheme is shortened by at least an order of magnitude.…”

“…[22−24] Notice that the scheme in Refs. [19,20] employs the dispersive interaction for suppressing the excitation of either atoms or photons, thus the operation time is relatively long. Notice also that both the schemes based on the adiabatic passage [18] and quantum Zeno dynamic [15] employ the weak laser driving as to guarantee the system's state evolution confined in the specific ('dark state' or 'Zeno') subspace, they thus also suffer from a slow operation process.…”

“…In the scheme, the resonant interaction between the distant atoms as well as between the cavities is driven by moderate laser fields, thus guarantees a relatively faster operation process, as compared to the previous ones in Refs. [18][19][20][21], due to the fact that one of the methods for reducing the quantum decoherence effect is to cut down the operation time. In this context, the scheme might be favorable for the complicated coherent control in quantum communication and computation.…”

Demonstration of Controlled Quantum Teleportation for Discrete Variables on Linear Optical Devices

“…To achieve that, polarization of the photon in mode 3 is changed to circular |R 3 = 1 √ 2 {|H 3 + i|V 3 } and then it overlaps with photon in mode 2 on the polarizing beamsplitter P BS. With success probability of 1 2 , these two photons leave P BS by different output ports and together with the photon in mode 1 form the GHZ state |G (1) [38]. Although we have not repeated the GHZ state preparation testing in the same way as the authors of Ref.…”