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8 papers · 2 filters
Quantum Thermodynamic Cycles and quantum heat engines
H. T. Quan, Yu-xi Liu, C. P. Sun +1
In order to describe quantum heat engines, here we systematically study isothermal and isochoric processes for quantum thermodynamic cycles. Based on these results the quantum vers…
Enhancement of entanglement transfer in a spin chain by phase shift-control
K. Maruyama, T. Iitaka, F. Nori
We study the effect of a phase shift on the amount of transferrable two-spin entanglement in a spin chain. We consider a ferromagnetic Heisenberg/XY spin chain, both numerically an…
Observing quantum non-locality in the entanglement between modes of massive particles
S. Ashhab, Koji Maruyama, Franco Nori
We consider the question of whether it is possible to use the entanglement between spatially separated modes of massive particles to observe nonlocal quantum correlations. Mode ent…
Efficient one-step generation of large cluster states with solid-state circuits
J. Q. You, Xiang-bin Wang, Tetsufumi Tanamoto +1
Highly entangled states called cluster states are a universal resource for measurement-based quantum computing (QC). Here we propose an efficient method for producing large cluster…
Decoherence in a scalable adiabatic quantum computer
S. Ashhab, J. R. Johansson, Franco Nori
We consider the effects of decoherence on Landau-Zener crossings encountered in a large-scale adiabatic-quantum-computing setup. We analyze the dependence of the success probabilit…
A characterization of global entanglement
Peter J. Love, Alec Maassen van den Brink, A. Yu. Smirnov +5
We define a set of entanglement monotones for qubits and give a single measure of entanglement in terms of these. This measure is zero except on globally entangled…