All Outputs (101)

Concentrating tripartite quantum information (2015)
Journal Article

We introduce the concentrated information of tripartite quantum states. For three parties Alice, Bob, and Charlie, it is defined as the maximal mutual information achievable between Alice and Charlie via local operations and classical communication p... Read More about Concentrating tripartite quantum information.

Measuring quantum coherence with entanglement (2015)
Journal Article

Quantum coherence is an essential ingredient in quantum information processing and plays a central role in emergent fields such as nanoscale thermodynamics and quantum biology. However, our understanding and quantitative characterization of coherence... Read More about Measuring quantum coherence with entanglement.

Individual quantum probes for optimal thermometry (2015)
Journal Article

© 2015 American Physical Society. The unknown temperature of a sample can be estimated with minimal disturbance by putting it in thermal contact with an individual quantum probe. If the interaction time is sufficiently long so that the probe thermali... Read More about Individual quantum probes for optimal thermometry.

Frozen quantum coherence (2015)
Journal Article

We analyze under which dynamical conditions the coherence of an open quantum system is totally unaffected by noise. For a single qubit, specific measures of coherence are found to freeze under different conditions, with no general agreement between t... Read More about Frozen quantum coherence.

Characterizing non-Markovianity via quantum interferometric power (2015)
Journal Article

Non-Markovian evolution in open quantum systems is often characterized in terms of the backflow of information from environment to system and is thus an important facet in investigating the performance and robustness of quantum information protocols.... Read More about Characterizing non-Markovianity via quantum interferometric power.

Quantification of Gaussian quantum steering (2015)
Journal Article

Einstein-Podolsky-Rosen steering incarnates a useful nonclassical correlation which sits between entanglement and Bell nonlocality. While a number of qualitative steering criteria exist, very little has been achieved for what concerns quantifying ste... Read More about Quantification of Gaussian quantum steering.

Optimal performance of endoreversible quantum refrigerators (2014)
Journal Article

The derivation of general performance benchmarks is important in the design of highly optimized heat engines and refrigerators. To obtain them, one may model phenomenologically the leading sources of irreversibility ending up with results that are mo... Read More about Optimal performance of endoreversible quantum refrigerators.

Certifying quantumness: benchmarks for the optimal processing of generalized coherent and squeezed states (2014)
Journal Article

Quantum technology promises revolutionary advantages in information processing and transmission compared to classical technology; however, determining which specific resources are needed to surpass the capabilities of classical machines often remains... Read More about Certifying quantumness: benchmarks for the optimal processing of generalized coherent and squeezed states.

No-activation theorem for Gaussian nonclassical correlations by Gaussian operations (2014)
Journal Article

We study general quantum correlations of continuous variable Gaussian states and their interplay with entanglement. Specifically, we investigate the existence of a quantum protocol activating all nonclassical correlations between the subsystems of an... Read More about No-activation theorem for Gaussian nonclassical correlations by Gaussian operations.

Gaussian interferometric power (2014)
Journal Article

The interferometric power of a bipartite quantum state quantifies the precision, measured by quantum Fisher information, that such a state enables for the estimation of a parameter embedded in a unitary dynamics applied to one subsystem only, in the... Read More about Gaussian interferometric power.

Quantum discord determines the interferometric power of quantum states (2014)
Journal Article

Quantum metrology exploits quantum mechanical laws to improve the precision in estimating technologically relevant parameters such as phase, frequency, or magnetic fields. Probe states are usually tailored to the particular dynamics whose parameters... Read More about Quantum discord determines the interferometric power of quantum states.

Continuous-variable versus hybrid schemes for quantum teleportation of Gaussian states (2014)
Journal Article

In this paper, we examine and compare two fundamentally different teleportation schemes: the well-known continuous-variable scheme of Vaidman, Braunstein, and Kimble (VBK) and a recently proposed hybrid scheme by Andersen and Ralph (AR). We analyze t... Read More about Continuous-variable versus hybrid schemes for quantum teleportation of Gaussian states.

Relativistic Quantum Metrology: Exploiting relativity to improve quantum measurement technologies (2014)
Journal Article

We present a framework for relativistic quantum metrology that is useful for both Earth-based and space-based technologies. Quantum metrology has been so far successfully applied to design precision instruments such as clocks and sensors which outper... Read More about Relativistic Quantum Metrology: Exploiting relativity to improve quantum measurement technologies.

Experimental entanglement activation from discord in a programmable quantum measurement (2014)
Journal Article

In quantum mechanics, observing is not a passive act. Consider a system of two quantum particles A and B: if a measurement apparatus M is used to make an observation on B, the overall state of the system AB will typically be altered. When this happen... Read More about Experimental entanglement activation from discord in a programmable quantum measurement.

Quantum-enhanced absorption refrigerators (2014)
Journal Article

Thermodynamics is a branch of science blessed by an unparalleled combination of generality of scope and formal simplicity. Based on few natural assumptions together with the four laws, it sets the boundaries between possible and impossible in macrosc... Read More about Quantum-enhanced absorption refrigerators.

Quantum benchmarks for pure single-mode Gaussian states (2014)
Journal Article

Teleportation and storage of continuous variable states of light and atoms are essential building blocks for the realization of large-scale quantum networks. Rigorous validation of these implementations require identifying, and surpassing, benchmarks... Read More about Quantum benchmarks for pure single-mode Gaussian states.

Theory of genuine tripartite nonlocality of Gaussian states (2014)
Journal Article

We investigate the genuine multipartite nonlocality of three-mode Gaussian states of continuous variable systems. For pure states, we present a simplified procedure to obtain the maximum violation of the Svetlichny inequality based on displaced parit... Read More about Theory of genuine tripartite nonlocality of Gaussian states.

Hierarchy and dynamics of trace distance correlations (2013)
Journal Article

We define and analyze measures of correlations for bipartite states based on trace distance. For Bell diagonal states of two qubits, in addition to the known expression for quantum correlations using this metric, we provide analytic expressions for t... Read More about Hierarchy and dynamics of trace distance correlations.

Genuine tripartite entanglement and nonlocality in Bose-Einstein condensates by collective atomic recoil (2013)
Journal Article

We study a system represented by a Bose-Einstein condensate interacting with a cavity field in presence of a strong off-resonant pumping laser. This system can be described by a three-mode Gaussian state, where two are the atomic modes corresponding... Read More about Genuine tripartite entanglement and nonlocality in Bose-Einstein condensates by collective atomic recoil.

Asymptotically optimal quantum channel reversal for qudit ensembles and multimode Gaussian states (2012)
Journal Article

We investigate the problem of optimally reversing the action of an arbitrary quantum channel C which acts independently on each component of an ensemble of n identically prepared d-dimensional quantum systems. In the limit of large ensembles, we cons... Read More about Asymptotically optimal quantum channel reversal for qudit ensembles and multimode Gaussian states.