Interpolation of recurrence and hashing entanglement distillation protocols

We construct new entanglement distillation protocols by interpolating between the recurrence and hashing protocols. This leads to asymptotic two-way distillation protocols, resulting in an improvement of the distillation rate for all mixed Bell diagonal entangled states, even for the ones with very high fidelity. We also present a method how entanglement-assisted distillation protocols can be converted into non-entanglement-assisted protocols with the same yield

Delocalized Entanglement of Atoms in optical Lattices

We show how to detect and quantify entanglement of atoms in optical lattices in terms of correlations functions of the momentum distribution. These distributions can be measured directly in the experiments. We introduce two kinds of entanglement measures related to the position and the spin of the atoms

LONG TERM PRESENCE OF ISLAND MASS EFFECT AT TIPUTA CHANNEL, RANGIROA ATOLL

M.S

Quantum simulators, continuous-time automata, and translationally invariant systems

The general problem of finding the ground state energy of lattice Hamiltonians is known to be very hard, even for a quantum computer. We show here that this is the case even for translationally invariant systems. We also show that a quantum computer can be built in a 1D chain with a fixed, translationally invariant Hamitonian consisting of nearest--neighbor interactions only. The result of the computation is obtained after a prescribed time with high probability.Comment: partily rewritten and important references include

Yet another additivity conjecture

It is known that the additivity conjecture of Holevo capacity, output minimum entoropy, and the entanglement of formation (EoF), are equivalent with each other. Among them, the output minimum entropy is simplest, and hence many researchers are focusing on this quantity. Here, we suggest yet another entanglement measure, whose strong superadditivity and additivity are equivalent to the additivity of the quantities mentioned above. This quantity is as simple as the output minimum entropy, and in existing proofs of additivity conjecture of the output minimum entropy for the specific examples, they are essentially proving the strong superadditivity of this quantity.Comment: corrections of typo, etc. minor revisio

Entanglement distillation by dissipation and continuous quantum repeaters

Even though entanglement is very vulnerable to interactions with the environment, it can be created by purely dissipative processes. Yet, the attainable degree of entanglement is profoundly limited in the presence of noise sources. We show that distillation can also be realized dissipatively, such that a highly entanglement steady state is obtained. The schemes put forward here display counterintuitive phenomena, such as improved performance if noise is added to the system. We also show how dissipative distillation can be employed in a continuous quantum repeater architecture, in which the resources scale polynomially with the distance

Epistemic Success and Skeptical Norms in Argument

The Default Skeptical Stance (DSS) delineates dialectical partners behavior toward one another given the adversariality thesis. Phyllis Rooney holds that the DSS, as a bridge between the formal and pragmatic elements of adversariality, leads to epistemic dysfunction. This connection commits the Adversarialist to defending the DSS. My modest version of this defense will be to show that the dysfunction in Rooney’s going case, the Penaluna – Leiter exchange, is not attributable to argument’s skeptical norms