We propose and analyze a new approach for quantum state transfer between remote spin qubits. Specifically, we demonstrate that coherent quantum coupling between remote qubits can be achieved via certain classes of random, unpolarized (infinite temperature) spin chains. Our method is robust to coupling-strength disorder and does not require manipulation or control over individual spins. In princ...

Quantum state transfer is crucial for quantum information processing and computation. Here, we propose a hybrid optomechanical system capable of coupling qubit, an optical mode mechanical oscillator. The displacement the oscillator,due to radiation pressure, induces spatial variation in cavity field, which turn couples qubit with phonon mode. This allows between without actual interaction them....

Using a global optimization algorithm we obtain spin chains with site-dependent exchange coefficients which allow almost perfect quantum state transfer between the extremes of without any further time-dependent external control. We consider isotropic and anisotropic Heisenberg Hamiltonian up to 100 spins. The method us choose arrival transferred by changing range available coupling strengths. s...

One of the strengths of quantum information theory is that it can treat quantum states without referring to their particular physical representation. In principle, quantum states can be therefore fully swapped between various quantum systems by their mutual interaction and this quantum state transfer is crucial for many quantum communication and information processing tasks. In practice, howeve...

We study the possibility of realizing perfect quantum state transfer in mesoscopic devices. We discuss the case of the Fano-Anderson model extended to two impurities. For a channel with an infinite number of degrees of freedom, we obtain coherent behavior in the case of strong coupling or in weak coupling off-resonance. For a finite number of degrees of freedom, coherent behavior is associated ...

Recent observations support the view that the universe is described by a FLRW model with Ω0m ≈ 0.3, Ω0Λ ≈ 0.7, and w ≤ −1/3 at the present epoch. There are several theoretical suggestions for the cosmological Λ component and for the particular form of the energy transfer between this dark energy and matter. This gives a strong motive for a systematic study of general properties of two-fluid FLR...

Parsing systems which rely on hand-coded linguistic descriptions can only perform adequately in as far as these descriptions are correct and complete. The paper describes an error mining technique to discover problems in hand-coded linguistic descriptions for parsing such as grammars and lexicons. By analysing parse results for very large unannotated corpora, the technique discovers missing, in...

A recently reported procedure for the design of M-channe1 perfect-reconstruction quadrature mirror filter banks uses the concept of “lossless alias-component matrices.” The synthesis of such QMF banks centers around the generation of a lossless M X M FIR transfer matrix E ( z ) . Recent results for such generation have been somewhat ad hoc, Le., not sufficiently general. In this paper, a genera...