Results 91 to 100 of about 1,306,990 (294)
Angewandte Chemie, EarlyView.The performance of molecular photoswitches relies on their structural adaptability in solution. Employing gas‐phase rotational spectroscopy and quantum chemistry, we explore the microhydration of camphorquinone imine and show that water binding shifts the E/Z equilibrium, even reversing relative stabilities, while enabling dynamic motion at low ...
Nuno M. Campos +8 more
wiley +2 more sources
Geometric picture of quantum discord for two-qubit quantum states
, 2011 Among various definitions of quantum correlations, quantum discord has attracted considerable attention. To find analytical expression of quantum discord is an intractable task.
Chunxiao Sun +7 more
core +1 more source
Asymmetry of bipartite quantum discord [PDF]
JETP Letters, 2011 It is known from the analysis of the density matrix for bipartite systems that the quantum discord (as a measure of quantum correlations) depends on the particular subsystem chosen for the projective measurements. We study asymmetry of the discord in a simple physical model of two spin-1/2 particles with the dipole-dipole interaction governed by the XY
Edward B. Fel'dman, A. I. Zenchuk
openaire +4 more sources
Advanced Optical Materials, EarlyView.A strong interaction between the five‐armchair graphene nanoribbons (GNRs) and the encapsulating single‐walled carbon nanotubes is identified. A reduction of the bandgap of the hybrid structure as well as additional proof for the single H‐terminations of the GNRs are confirmed through a combination of optical absorbance spectroscopy and density ...
Dido Denier van der Gon +8 more
wiley +1 more source
Entanglement Distribution and Quantum Discord [PDF]
, 2017 Establishing entanglement between distant parties is one of the most important problems of quantum technology, since long-distance entanglement is an essential part of such fundamental tasks as quantum cryptography or quantum teleportation. In this lecture we review basic properties of entanglement and quantum discord, and discuss recent results on ...
Alexander Streltsov +2 more
openaire +3 more sources
Finite-temperature quantum discordant criticality
Physical Review B, 2022 In quantum statistical mechanics, finite-temperature phase transitions are typically governed by classical field theories. In this context, the role of quantum correlations is unclear: recent contributions have shown how entanglement is typically very short-ranged, and thus uninformative about long-ranged critical correlations.
Tarabunga, Poetri Sonya +3 more
openaire +4 more sources
Advanced Optical Materials, EarlyView.Femtosecond TAS measurements on perovskite nanocrystals reveal how the one‐photon absorption cross‐section scales linearly with nanocrystal volume, independent of shape. In contrast, biexciton Auger lifetimes vary strongly with shape and remain constant in the weak confinement regime for nanocrystals larger than the exciton Bohr radius, offering new ...
Andreas Singldinger +8 more
wiley +1 more source
Quantum correlation in three-qubit Heisenberg model with Dzyaloshinskii-Moriya interaction
, 2011 We investigate the pairwise thermal quantum discord in a three-qubit XXZ model with Dzyaloshinskii-Moriya (DM) interaction. We find that the DM interaction can increase quantum discord to a fixed value in the anti- ferromagnetic system, but decreases ...
A.K. Pal +10 more
core +1 more source
Reply to “Comment on ‘How to observe and quantify quantum-discord states via correlations’ ” [PDF]
Physical Review A, 2019 Quantum correlations between parts of a composite system most clearly reveal themselves through entanglement. Designing, maintaining, and controlling entangled systems is very demanding, which raises the stakes for understanding the efficacy of ...
M. Hunt +3 more
semanticscholar +1 more source
QUANTUM DISCORD, DECOHERENCE AND QUANTUM PHASE TRANSITION [PDF]
International Journal of Modern Physics B, 2012 Quantum discord is a more general measure of quantum correlations than entanglement and has been proposed as a resource in certain quantum information processing tasks. The computation of discord is mostly confined to two-qubit systems for which an analytical calculational scheme is available.
Amit Kumar Pal, Indrani Bose
openaire +3 more sources