[PDF] Top 20 Quantum discord determines the interferometric power of quantum states

... We acknowledge discussions with S. Benjamin, T. Bonagamba, T. Bromley, M. Cianciaruso, L. Correa, L. Davidovich, E. deAzevedo, B. Escher, E. Gauger, M. Genoni, M. Guta, S. Huelga, M. S. Kim, M. Lang, B. Lovett, K. ... See full document

... 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 ... See full document

... that determines if a signal will be detected or ...in quantum channel, losses in the coupling between the photon-pair source and the optical fibres and finally finite detection efficiency make detection ... See full document

... terferometric power turns out to be a measure of discord- type correlations in the input state ...classical- quantum state, eq. (20). This entails that states with zero discord cannot ... See full document

... operational power of discord as “ entanglement potential ” [8,9,16] and proves successfully the activation of distillable bipartite entanglement from input ...Bell states of photons A and BM , which ... See full document

... of quantum entanglement amongst the several parts of a multipartite quantum state ...of quantum correlations has been studied quite extensively [1]- [23] and it is shown that the measures of ... See full document

... the interferometric power turns out to be a measure of discord- type correlations in the input state ...that states with zero discord cannot guarantee a precision in parameter ... See full document

... bipartite quantum state in the ancilla-assisted channel discrimina- tion of arbitrary quantum channels, formally defining a worst-case-scenario channel discrimination power for bipartite ... See full document

... input power as described in Eq. (7) and/or introducing squeezed states of light at the antisymmetric port [1, ...optical power is expected during the next sci- ence runs after a set of technical ... See full document

... high power in a nonlinear optical parametric oscillator, and then sent into both input ports of a Mach-Zehnder interferometer to achieve the desired increase inter- ferometric gyroscopic sensitivity, approaching ... See full document

... thermal states for scalar and fermion fields in unbounded Minkowski ...such states are ill-defined everywhere, but for fermion fields an appropri- ate definition of the vacuum gives thermal states ... See full document

... signature states are chosen from a set of non- orthogonal quantum states, which cannot be distinguished ...signature states are available, or if jαj 2 is too large, then the private phases ... See full document

... Instead, we require that the family of states looks random even if polynomially many copies of the state are given to the distinguishing algorithm. We argue that this is the more natural way to define pseudorandom ... See full document

... in quantum dots do not come necessarily ...called quantum rods, exhibit bound excited state with an energy embedded in the continuum of other free electronic states, above the ionization ...of ... See full document

... principal quantum number of 49, 50, or 51 labeled by as f , g, and e levels, respectively) is considered ...of quantum cavities, each including a quantum cavity C between two classical cavities R’s, ... See full document

... to quantum dis- cord relates to local broadcasting [42, 43]: correlations that exhibit quantum discord cannot be freely locally re- distributed or broadcast, and discord can be interpreted as ... See full document

... on quantum correlation are almost based on the projective measurements and confined in inertial ...the quantum correlation and give a more complete frame to theoretically study it, in this paper we will ... See full document

... that quantum discord is more sensitive to vacuum fluctuations, which are responsible for creating correlations between the two atoms outside the light ... See full document

... in the neighbourhood of the true value of the parameters. 4 The CRB is proven using the Cauchy–Schwarz inequality [21]. The condition for existence of a locally unbiased estimator saturating the bound is stated in ... See full document

... a quantum cooler with a quantum state of each of ions that play the role of ...of quantum information between ions distances and also is an instrument for quantum logical ...first ... See full document