Results 111 to 120 of about 13,301 (232)
Global quantum correlations in finite-size spin chains
New Journal of Physics, 2013 We perform an extensive study of the properties of global quantum correlations in finite-size one-dimensional quantum spin models at finite temperature. By adopting a recently proposed measure for global quantum correlations (Rulli and Sarandy 2011 Phys.
S Campbell +6 more
doaj +1 more source
Circulant States with Vanishing Quantum Discord [PDF]
Open Systems & Information Dynamics, 2012 We analyze a class of 2-qudit circulant states. They define a generalization of well-known 2-qubit X-states. We formulate necessary and sufficient criteria for vanishing of quantum discord. We illustrate our analysis by an important subclass of circulant states — the so-called Bell diagonal states.
Bylicka, Bogna, Chruściński, Dariusz
openaire +4 more sources
Vision‐Based Handover and Organization of Robotic Scrub Nurse for Seamless Surgical Flow
Advanced Intelligent Systems, EarlyView.This study presents a pose estimation‐based robotic scrub nurse (PERSN) that assists surgical procedures by estimating the surgeon's hand position, orientation, and grasping state, along with the constraint‐based 6D pose of surgical instruments. User evaluations show that PERSN provides greater immediate usability and reduces physical demand compared ...
Seongjoon Kang +9 more
wiley +1 more source
Quantum discord induced by white noises
, 2011 We discuss the creation of quantum discord between two two-level atoms trapped in an optical cavity in a noisy environment. It is shown that nonzero steady-state quantum discord between atoms can be obtained when the white-noise field is separately ...
Ali +42 more
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Geometric measure of quantum discord for entanglement of Dirac fields in noninertial frames
Physics Letters B, 2015 We investigate the geometric measure of quantum discord of all possible bipartite divisions of a tripartite system of Dirac fields in noninertial frames. As a comparison, we calculate the geometric measure of entanglement.
Wen-Chao Qiang, Lei Zhang
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Super Quantum Discord with Weak Measurements
, 2013 Weak measurements cause small change to quantum states, thereby opening up the possibility of new ways of manipulating and controlling quantum systems. We ask, can weak measurements reveal more quantum correlation in a composite quantum state?
Pati, Arun Kumar, Singh, Uttam
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Geometric global quantum discord [PDF]
Journal of Physics A: Mathematical and Theoretical, 2012 Geometric quantum discord, proposed by Dakic, Vedral, and Brukner [Phys. Rev. Lett. 105 (2010) 190502], is an important measure for bipartite correlations. In this paper, we generalize it to multipartite states, we call the generalized version geometric global quantum discord (GGQD).
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Discord, Quantum Knowledge and Private Communications [PDF]
, 2017 In this brief review, we discuss the role that quantum correlations, as quantified by quantum discord, play in two interesting settings. The first one is discerning which unitaries have been applied on a quantum system, by taking advantage of knowledge regarding its initial configuration. Here discord captures the "quantum" component of this knowledge,
Gu, Mile, Pirandola, Stefano
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Advanced Physics Research, EarlyView.This work reports near‐surface nitrogen ion implantation in Al‐doped ZnO thin films deposited by RF magnetron sputtering and examines post‐implantation effects at room temperature. Structural, morphological, optical, and electrical modifications are analyzed.
Richa Sharma +7 more
wiley +1 more source
Experimental detection of non-classical correlations in mixed state quantum computation
, 2011 We report on an experiment to detect non-classical correlations in a highly mixed state. The correlations are characterized by the quantum discord and are observed using four qubits in a liquid state nuclear magnetic resonance quantum information ...
Laflamme, R. +3 more
core +1 more source