1,989 research outputs found
Measurement-Based Quantum Computation on Two-Body Interacting Qubits with Adiabatic Evolution
A cluster state cannot be a unique ground state of a two-body interacting
Hamiltonian. Here, we propose the creation of a cluster state of logical qubits
encoded in spin-1/2 particles by adiabatically weakening two-body interactions.
The proposal is valid for any spatial dimensional cluster states. Errors
induced by thermal fluctuations and adiabatic evolution within finite time can
be eliminated ensuring fault-tolerant quantum computing schemes.Comment: title updated, introduction and discussions sections update
Long-distance entanglement generation with scalable and robust two-dimensional quantum network
We present a protocol for generating entanglement over long distances in a
two-dimensional quantum network based on the surface error-correction code.
This protocol requires a fixed number of quantum memories at each node of the
network and tolerates error rates of up to 1.67% in the quantum channels.Comment: 5 pags, 4 figs. V2: text corrected, discussion on channel losses
added. Accepted by PR
Robust-fidelity atom-photon entangling gates in the weak-coupling regime
We describe a simple entangling principle based on the scattering of photons
off single emitters in one-dimensional waveguides (or extremely-lossy
cavities). The scheme can be applied to photonic qubits encoded in polarization
or time-bin, and features a filtering mechanism that works effectively as a
built-in error-correction directive. This automatically maps imperfections from
weak couplings, atomic decay into undesired modes, frequency mismatches, or
finite bandwidths of the incident photonic pulses, into heralded losses instead
of infidelities. The scheme is thus adequate for high-fidelity maximally
entangling gates even in the weak-coupling regime. These, in turn, can be
directly applied to store and retrieve photonic-qubit states, thereby
completing an atom-photon interface toolbox, or to sequential measurement-based
quantum computations with atomic memories.Comment: 5 pages, 2 figure
Effect and clinical medicine observation after phacoemulsification for herpes simplex keratitis with cataract
AIM: To research the vision changes after phacoemulsification for herpes simplex keratitis(HSK)with cataract, and the clinical effect of antiviral drugs in preventing HSK relapse as well.<p>METHODS:Twenty-two cases(22 eyes)with HSK combined cataract were treated by phacoemulsification and intraocular lens implantation, and then randomly divided into two groups. The patients in treatment group received aciclovir tablets and ganciclovir ophthalmic gel, those in control group received ganciclovir ophthalmic gel only. The vision changes after phacoemulsification were observed and the HSK relapse was analyzed.<p>RESULTS: After follow-up of 6 months, the visions of patients in both groups were improved. No relapse of HSK was found in the treatment group, and only one relapse of HSK was found in the control group after 6 months. There were no significant differences in therapy effects. <p>CONCLUSION: Under the protection of antiviral drug, cataract surgery can be applied to patients with HSK recurrence-free more than 6 months, and improve the visions effectively. Ganciclovir ophthalmic gel can effectively prevent the relapse of HSK after cataract surgery
Acetohydroxamic acid adsorbed at copper surface: electrochemical, Raman and theoretical observations
Computation of the p6 order chiral Lagrangian coefficients from the underlying theory of QCD
We present results of computing the p6 order low energy constants in the
normal part of chiral Lagrangian both for two and three flavor pseudo-scalar
mesons. This is a generalization of our previous work on calculating the p4
order coefficients of the chiral Lagrangian in terms of the quark self energy
Sigma(p2) approximately from QCD. We show that most of our results are
consistent with those we can find in the literature.Comment: 51 pages,2 figure
Exploring Users’ Intention to use QQ\u27s Various Functions based on Social Cognitive Theory
Based upon social cognitive theory, this study explores the effect of personal and environment factors on users’ intention to use QQ’s various functions. Online survey is used to collect data in China. The results show that relationship benefit, switching cost, compatibility and subjective norms can significantly affect users’ intention to use QQ’s various functions. Whereas image benefit, perceived advantage and popularity have no effect. Finally, we propose the theoretical contribution and practical implication of this study
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