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Quantum spin squeezing
Quantum thermodynamic cycles and quantum heat engines.
- H. Quan, Yu-xi Liu, C. P. Sun, F. Nori
- PhysicsPhysical review. E, Statistical, nonlinear, and…
- 28 November 2006
The role of Maxwell's demon is discussed and it is found that there is no violation of the second law, even in the existence of such a demon, when the demon is included correctly as part of the working substance of the heat engine.
Controllable scattering of a single photon inside a one-dimensional resonator waveguide.
We analyze the coherent transport of a single photon, which propagates in a one-dimensional coupled-resonator waveguide and is scattered by a controllable two-level system located inside one of the…
Decay of Loschmidt echo enhanced by quantum criticality.
It is found that the quantum critical behavior of E strongly affects its capability of enhancing the decay of LE: near the critical value of the transverse field entailing the happening of quantum phase transition, the off-diagonal elements of the reduced density matrix describing S vanish sharply.
Quantum computation based on d-level cluster state (11 pages)
The concept of a qudit (a d-level system) cluster state is proposed by generalizing the qubit cluster state to higher-dimensional Hilbert space according to the finite-dimensional representations of quantum plane algebra and a protocol of implementing one-way quantum computer is suggested using the high-dimensional "Ising" model.
Steady quantum coherence in non-equilibrium environment
Quantum Fisher information flow and non-Markovian processes of open systems
We establish an information-theoretic approach for quantitatively characterizing the non-Markovianity of open quantum processes. Here, the quantum Fisher information (QFI) flow provides a measure to…
Quantum coherence in multipartite systems
Within the unified framework of exploiting the relative entropy as a distance measure of quantum correlations, we make explicit the hierarchical structure of quantum coherence, quantum discord, and…
Optical selection rules and phase-dependent adiabatic state control in a superconducting quantum circuit.
The optical selection rules of the microwave-assisted transitions in a flux qubit superconducting quantum circuit (SQC) are analyzed and a so-called delta-type "cyclic" three-level atom is formed, where one- and two-photon processes can coexist.
Lehmann-Symanzik-Zimmermann reduction approach to multiphoton scattering in coupled-resonator arrays
We present a quantum field theoretical approach based on the Lehmann-Symanzik-Zimmermann reduction for the multiphoton scattering process in a nanoarchitecture consisting of the coupled-resonator…