The detailed characterization of non-trivial coherence properties of composite quantum systems of increasing size is an indispensable prerequisite for scalable quantum computation, as well as for understanding non-equilibrium many-body physics. Here, we show how autocorrelation functions in an interacting system of phonons as well as the quantum discord between distinct degrees of freedoms can ...

In this Letter we exploit the recently solved conjecture on the bosonic minimum output entropy to show the optimality of Gaussian discord, so that the computation of quantum discord for bipartite Gaussian states can be restricted to local Gaussian measurements. We prove such optimality for a large family of Gaussian states, including all two-mode squeezed thermal states, which are the most typi...

We know little about what causes divorce in contexts outside of the West. This paper focuses on marital dissolution in a rural, agrarian context of Nepal that has recently experienced a great deal of social change. Marriage in this context is highly valued, with farreaching significance for not only the husband and wife but also for their extended families. Marital dissolutions due to separatio...

We propose the first correct special-purpose quantum circuits for preparation of Bell diagonal states (BDS), and implement them on IBM Quantum computer, characterizing testing complex aspects their correlations in full parameter space. Among proposed, one involves only two bits but requires adapted tomography routines handling classical parallel. The entire class is generated, several character...

D. Cavalcanti,1 L. Aolita,2 S. Boixo,3 K. Modi,1 M. Piani,4 and A. Winter1,5 1Centre for Quantum Technologies, National University of Singapore, Singapore 117542 2ICFO-Institut de Ciéncies Fotóniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain 3Institute for Quantum Information, California Institute of Technology, Pasadena, California 91125, USA 4Institute for Quantum...

Chee Kong Lee,1,* Leong Chuan Kwek,1,2 and Jianshu Cao3 1Centre for Quantum Technologies, National University of Singapore, 117543 Singapore 2National Institute of Education and Institute of Advanced Studies, Nanyang Technological University, 637616 Singapore 3Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA (Received 7 August 2011; published 1...

Indices of marital discord and mother-child affective processes were used to predict levels of negativity children displayed with unfamiliar peers. Thirty-nine mothers and their 5-year-olds were observed with 5–7 other mother-child dyads during a 30-minute free play session. Mother and child negativity were coded and two types of marital discord were assessed via mother self-report: affiliative...