EFFICIENT SCHEME FOR PREPARING POLARIZATION-ENTANGLED PHOTONIC CLUSTER STATES BASED ON CROSS-KERR NONLINEARITY

A scheme is proposed for generating a polarization four-photon cluster, which is believed to be suitable to achieve the one-way quantum computing via single-qubit projective measurements, with the help of only cross-Kerr nonlinearity and current linear optical systems. Compared with the existing schemes, the distinct advantage of the present scheme is that cluster states can be achieved with high success probability close to unity. Our scheme is experimentally demanding but efficient. Based on the present scheme, the cluster state of 3N + 1 photons can be obtained with the help of linear optical elements.

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IMPLEMENTATION OF SWAP GATE AND FREDKIN GATE USING LINEAR OPTICAL ELEMENTS

International Journal of Quantum Information ◽

10.1142/s0219749913500317 ◽

2013 ◽

Vol 11 (03) ◽

pp. 1350031 ◽

Cited By ~ 4

Author(s):

MENG-ZHENG ZHU ◽

LIU YE

Keyword(s):

Photon Number ◽

Success Probability ◽

Distinct Advantage ◽

Single Photons ◽

Linear Optics ◽

Optical Elements ◽

Present Scheme ◽

Fredkin Gate ◽

Swap Gate ◽

Linear Optical Elements

A scheme is proposed to directly implement the optical swap gate and quantum Fredkin gate based on the Mach–Zehnder interferometer (MZI). The distinct advantage of the present scheme is that ancilla single-photons are not needed. The optical swap gate is deterministic and does not need the photon number resolving detectors. The total success probability of the present Fredkin gate can reach 1/16 by using basic linear-optics elements.

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An efficient controlled quantum secure direct communication and authentication by using four particle cluster states

International Journal of Quantum Information ◽

10.1142/s0219749917500022 ◽

2017 ◽

Vol 15 (01) ◽

pp. 1750002 ◽

Cited By ~ 6

Author(s):

Milad Nanvakenari ◽

Monireh Houshmand

Keyword(s):

Cluster State ◽

Quantum Secure Direct Communication ◽

Identity Authentication ◽

Secret Message ◽

Particle Cluster ◽

Cluster States ◽

Present Scheme ◽

Direct Communication ◽

Eavesdropping Detection ◽

Base Identity

In this paper, a three-party controlled quantum secure direct communication and authentication (QSDCA) protocol is proposed by using four particle cluster states via a quantum one-time pad and local unitary operations. In the present scheme, only under the permission of the controller, the sender and the receiver can implement secure direct communication successfully. But under any circumstances, Charlie cannot obtain the secret message. Eavesdropping detection and identity authentication are achieved with the help of the previously shared reusable base identity strings of users. This protocol is unconditionally secure in both ideal and practical noisy cases. In one transmission, a qubit of each four particle cluster state is used as controller’s permission and the same qubit with another qubit are used to recover two classical bits of information. In the proposed scheme, the efficiency is improved compared with the previous works.

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DISCRIMINATING 16 MUTUALLY ORTHOGONAL 4-ATOM CLUSTER STATES VIA CAVITY QED IN TELEPORTING ARBITRARY UNKNOWN TWO-ATOM STATE WITH A 4-ATOM CLUSTER STATE AS QUANTUM CHANNEL

International Journal of Modern Physics C ◽

10.1142/s0129183108012455 ◽

2008 ◽

Vol 19 (05) ◽

pp. 741-747 ◽

Cited By ~ 10

Author(s):

WEN ZHANG ◽

YI-MIN LIU ◽

ZHANG-YIN WANG ◽

ZHAN-JUN ZHANG

Keyword(s):

Quantum Channel ◽

Cavity Qed ◽

Thermal Field ◽

Cluster State ◽

Photon Number ◽

Effective Hamiltonian ◽

Cluster States ◽

Present Scheme ◽

Atom Cluster ◽

Cavity Decay

We propose a scheme for discriminating 16 mutually orthogonal 4-atom cluster entangled states (CES) via cavity QED in teleporting an arbitrary unknown two-atom state with a 4-atom CES as quantum channel. Utilizing the interaction of atoms with cavity and classical field, the complicated 4-atom CESs are transformed into the simple 4-atom product states. Hence the difficulty of measurement during the teleportation process is degraded. In the present scheme, we allow for the case of a strong classical driving field and the detuning between the atoms and the cavity is assumed large enough. Thereby the photon-number-dependent parts in the effective Hamiltonian can be neglected, and the scheme is insensitive to both the cavity decay and the thermal field.

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LINEAR OPTICAL IMPLEMENTATION OF DISCRETE QUANTUM FOURIER TRANSFORM WITH CONVENTIONAL PHOTON DETECTORS

International Journal of Quantum Information ◽

10.1142/s0219749911007587 ◽

2011 ◽

Vol 09 (01) ◽

pp. 509-518 ◽

Cited By ~ 3

Author(s):

HONG-FU WANG ◽

SHOU ZHANG ◽

KYU-HWANG YEON

Keyword(s):

Fourier Transform ◽

Success Probability ◽

Optical Scheme ◽

Quantum Fourier Transform ◽

Photon Polarization ◽

Photon Detectors ◽

Optical Elements ◽

Two Photon ◽

Complex Linear ◽

Linear Optical

We present a linear optical scheme for implementing two-bit discrete quantum Fourier transform based only on simple linear optical elements, a pair of two-photon polarization entangled states, and the conventional photon detectors that only distinguish between the presence and absence of the photons. The scheme can be implemented with a certain success probability, and the implementation of the scheme in experiment would be an important step towards more complex linear optical quantum computation.

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MAXIMALLY ENTANGLED STATES FOR MANY TRAPPED IONS FROM SINGLE RESONANT INTERACTIONS

International Journal of Modern Physics B ◽

10.1142/s0217979207037405 ◽

2007 ◽

Vol 21 (16) ◽

pp. 2769-2776

Author(s):

LIN LI ◽

DAHAI XU ◽

YONGHONG TIAN ◽

XIUHUA YUAN

Keyword(s):

Vibrational Mode ◽

Resonant Interaction ◽

Trapped Ions ◽

Distinct Advantage ◽

Cluster States ◽

Alternative Scheme ◽

Present Scheme ◽

Resonant Interactions ◽

Maximally Entangled States ◽

Data Bus

We propose an alternative scheme to generate the GHZ states and cluster states for many trapped ions illuminated by a single laser tuned to the first lower vibrational sideband. The distinct advantage of the present scheme is that it does not use the vibrational mode as the data bus and only requires a single resonant interaction. Thus the present scheme is very simple and the interaction time is very short, which is important in view of decoherence.

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NONLOCAL CLONING FOR A STATE NEAR A GIVEN ONE WITH SINGLE-PHOTON INTERFERENCE

International Journal of Quantum Information ◽

10.1142/s0219749909005663 ◽

2009 ◽

Vol 07 (07) ◽

pp. 1331-1336 ◽

Cited By ~ 2

Author(s):

YANG SHAO ◽

YAN-HUI ZHOU ◽

AI-DONG ZHU

Keyword(s):

Single Photon ◽

Success Probability ◽

High Fidelity ◽

Optical Scheme ◽

Present Scheme ◽

Linear Optical ◽

Photon Loss ◽

Flying Qubit

A linear optical scheme is proposed for implementing a nonlocal cloning machine which copies a state near a given one with single-photon interference. We combine the advantages of photons and atoms by adopting two three level atoms as the storing qubits and a polarized photon as the flying qubit, and the photon loss events are also considered. With our present scheme, a high-fidelity cloning machine is realized at the expense of the success probability.

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SCHEME FOR TELECLONING AN IONIC STATE WITHOUT JOINT MEASUREMENT VIA LINEAR OPTICS

International Journal of Quantum Information ◽

10.1142/s0219749908003748 ◽

2008 ◽

Vol 06 (04) ◽

pp. 929-934 ◽

Cited By ~ 1

Author(s):

FEI YAN ◽

MING YANG ◽

ZHUO-LIANG CAO

Keyword(s):

Quantum Channel ◽

W State ◽

Distinct Advantage ◽

Linear Optics ◽

Joint Measurement ◽

Optical Elements ◽

Ionic State ◽

Linear Optical ◽

Linear Optical Elements

We present a protocol for telecloning an ionic state to M distant users by using linear optical elements. The quantum channel used here is a (M + 1)-particle W state. The most distinct advantage of the current scheme is that it does not need a joint measurement required by the previous telecloning schemes.

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