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10,296
Brain magnetic resonance imaging with contrast dependent on blood oxygenation.
 Proc. Natl. Acad. Sci. USA
, 1990
"... ABSTRACT Paramagnetic deoxyhemoglobin in venous blood is a naturally occurring contrast agent for magnetic resonance imaging (MRI). By accentuating the effects of this agent through the use of gradientecho techniques in high fields, we demonstrate in vivo images of brain microvasculature with imag ..."
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Cited by 648 (1 self)
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) the concentration of paramagnetic deoxyhemoglobin and (ii) the orientation of the vessel relative to the main magnetic field (8, 9). Since BOLD contrast depends on the state of blood oxygenation, physiological events that change the oxy/ deoxyhemoglobin ratio should lend themselves to noninvasive detection through
Survival of entanglement in thermal states
, 2008
"... PACS 05.30.d – Quantum statistical mechanics Abstract. We present a general sufficiency condition for the presence of multipartite entanglement in thermal states stemming from the ground state entanglement. The condition is written in terms of the ground state entanglement and the partition functi ..."
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Cited by 1 (1 self)
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PACS 05.30.d – Quantum statistical mechanics Abstract. We present a general sufficiency condition for the presence of multipartite entanglement in thermal states stemming from the ground state entanglement. The condition is written in terms of the ground state entanglement and the partition
Thermal States of Anyonic Systems
, 812
"... A study of the thermal properties of twodimensional topological lattice models is presented. This work is relevant to assess the usefulness of these systems as a quantum memory. For our purposes, we use the topological mutual information Itopo as a “topological order parameter”. For Abelian models, ..."
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Cited by 2 (0 self)
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A study of the thermal properties of twodimensional topological lattice models is presented. This work is relevant to assess the usefulness of these systems as a quantum memory. For our purposes, we use the topological mutual information Itopo as a “topological order parameter”. For Abelian models
Reasoning Under an Uncertain Thermal State
"... We propose a novel approach based on dual filtering techniques for the detection of possible variations of the thermal properties of the spacecraft that result from variations of its physical properties and for determining a complete thermal mapping of the system. System and sensor uncertainties are ..."
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Cited by 1 (1 self)
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are taken into account in the lumped parameter modeling of the thermal system and a dual filter is run on the stochastic model in an alternating optimization fashion to estimate the thermal state and coefficients of the resulting thermal network from the readings of few, strategically placed, thermal
Entanglement bounds for squeezed nonsymmetric thermal state
, 2003
"... I study the three parameters bipartite quantum Gaussian state called squeezed asymmetric thermal state, calculate Gaussian entanglement of formation analytically and the up bound of relative entropy of entanglement, compare them with coherent information of the state. Based on the result obtained, i ..."
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I study the three parameters bipartite quantum Gaussian state called squeezed asymmetric thermal state, calculate Gaussian entanglement of formation analytically and the up bound of relative entropy of entanglement, compare them with coherent information of the state. Based on the result obtained
Decay of Spatial Correlations in Thermal States
, 1998
"... We study the cluster properties of thermal equilibrium states in theories with a maximal propagation velocity (such as relativistic QFT). Our analysis, carried out in the setting of algebraic quantum field theory, shows that there is a tight relation between spectral properties of the generator of ..."
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Cited by 7 (7 self)
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We study the cluster properties of thermal equilibrium states in theories with a maximal propagation velocity (such as relativistic QFT). Our analysis, carried out in the setting of algebraic quantum field theory, shows that there is a tight relation between spectral properties of the generator
Thermal States in Conformal QFT. I
"... We analyze the set of locally normal KMS states w.r.t. the translation group for a local conformal net A of von Neumann algebras on R. In this first part, we focus on completely rational net A. Our main result here states that, if A is completely rational, there exists exactly one locally normal KM ..."
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Cited by 6 (2 self)
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KMS state ϕ. Moreover, ϕ is canonically constructed by a geometric procedure. A crucial rôle is played by the analysis of the “thermal completion net ” associated with a locally normal KMS state. A similar uniqueness result holds for KMS states of twodimensional local conformal nets w.r.t. the time
Thermal States in Conformal QFT. II
 COMMUNICATIONS IN MATHEMATICAL PHYSICS
, 2012
"... We continue the analysis of the set of locally normal KMS states w.r.t. the translation group for a local conformal net A of von Neumann algebras on R. In the first part we have proved the uniqueness of the KMS state on every completely rational net. In this second part, we exhibit several (nonra ..."
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We continue the analysis of the set of locally normal KMS states w.r.t. the translation group for a local conformal net A of von Neumann algebras on R. In the first part we have proved the uniqueness of the KMS state on every completely rational net. In this second part, we exhibit several (non
Modular Groups of Quantum Fields in Thermal States
, 1998
"... For a quantum field in a thermal equilibrium state we discuss the group generated by time translations and the modular action associated with an algebra invariant under halfsided translations. The modular flows associated with the algebras of the forward light cone and a spacelike wedge admit a sim ..."
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Cited by 19 (3 self)
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For a quantum field in a thermal equilibrium state we discuss the group generated by time translations and the modular action associated with an algebra invariant under halfsided translations. The modular flows associated with the algebras of the forward light cone and a spacelike wedge admit a
Results 1  10
of
10,296