Distillation protocols: Output entanglement and local mutual information

A complementary behavior between local mutual information and average output entanglement is derived for arbitrary bipartite ensembles. This leads to bounds on the yield of entanglement in distillation protocols that involve disinguishing. This bound is saturated in the hashing protocol for distillation, for Bell-diagonal states.Comment: 4 pages, RevTeX, no figures; v2: presentation improved, results unchanged; v3: published versio

Distributed super dense coding over noisy channels

We study multipartite super dense coding in the presence of a covariant noisy channel. We investigate the case of many senders and one receiver, considering both unitary and non-unitary encoding. We study the scenarios where the senders apply local encoding or global encoding. We show that, up to some pre-processing on the original state, the senders cannot do better encoding than local, unitary encoding. We then introduce general Pauli channels as a significant example of covariant maps. Considering Pauli channels, we provide examples for which the super dense coding capacity is explicitly determined

Brief of \u3cem\u3eAmici Curiae\u3c/em\u3e Financial Regulation Scholars in \u3cem\u3eSeila Law LLC v. Consumer Financial Protection Bureau\u3c/em\u3e

Peter Conti-Brown, Adam Levitin, and Patricia McCoy—three leading scholars of financial regulation—submitted this brief to the Supreme Court of the United States for the case Seila Law LLC v. Consumer Financial Protection Bureau to lend their expertise on the history and purpose of the Consumer Financial Protection Bureau’s structure. They take no position on the question of severability, but argue that, should the Court not dismiss the case, there are two alternatives that will respect Congress’s constitutional role as the legislative designer of federal administration. First, it can acknowledge that the many accountability-enhancing mechanisms that Congress attached to the CFPB bring it well within the constitutional mainstream and affirm the circuit court’s opinion. Second, it can remand the case for further review of these accountability-enhancing mechanisms. A holistic review of the CFPB’s structure will reveal the constitutional logic of Congress’s design. That record is not currently before the Court, and a remand would permit further review of these design features. What the Court should not do is accept Petitioner’s invitation to depart from the judicial lane and usurp Congress’s constitutional authority

Local governmental audit and accounting manual, as of March 1, 1991: a nonauthoritative practice aid;Notes to the illustrative combined financial statements;

https://egrove.olemiss.edu/aicpa_guides/1005/thumbnail.jp

Spin-Orbit Coupling in LaAlO3_3/SrTiO3_3 interfaces: Magnetism and Orbital Ordering

The combination of Rashba spin-orbit coupling and electron correlations can induce unusual phenomena in the metallic interface between SrTiO$_3$ and LaAlO$_3$. We consider effects of Rashba spin-orbit coupling at this interface in the context of the recent observation of anisotropic magnetism. Firstly, we show how Rashba spin-orbit coupling in a system near a band-edge can account for the observed magnetic anisotropy. Secondly, we investigate the coupling between in-plane magnetic-moment anisotropy and nematicity in the form of an orbital imbalance between d$_{xz}$ / d$_{yz}$ orbitals. We estimate this coupling to be substantial in the low electron density regime. Such an orbital ordering can affect magneto transport

Genuine Multiparty Quantum Entanglement Suppresses Multiport Classical Information Transmission

We establish a universal complementarity relation between the capacity of classical information transmission by employing a multiparty quantum state as a multiport quantum channel, and the genuine multipartite entanglement of the quantum state. The classical information transfer is from a sender to several receivers by using the quantum dense coding protocol with the multiparty quantum state shared between the sender and the receivers. The relation holds for arbitrary pure or mixed quantum states of an arbitrary number of parties in arbitrary dimensions.Comment: 5 (+ epsilon) pages, 2 figures, Revtex4-1; v2: Theorem 3 extended to all states, other results unchange

Locally Accessible Information of Multisite Quantum Ensembles Violates Monogamy

Locally accessible information is a useful information-theoretic physical quantity of an ensemble of multiparty quantum states. We find it has properties akin to quantum as well as classical correlations of single multiparty quantum states. It satisfies monotonicity under local quantum operations and classical communication. However we show that it does not follow monogamy, an important property usually satisfied by quantum correlations, and actually violates any such relation to the maximal extent. Violation is obtained even for locally indistinguishable, but globally orthogonal, multisite ensembles. The results assert that while single multiparty quantum states are monogamous with respect to their shared quantum correlations, ensembles of multiparty quantum states may not be so. The results have potential implications for quantum communication systems.Comment: 6 pages, RevTeX