Here is a question "Quantum field theory text on entanglement entropy" and there are some paper title-abstract pairs, which paper is the most relevent to the question? Please give me the title.
Title: Aspects of Reversible and Quantum Computing in a $p$ -Valued Domain
Abstract: This paper presents basic aspects of non-binary reversible and quantum computing in a $p$ -valued environment, since there are no physical reasons for quantum computing to be necessarily binary.A “quantum technology” is not yet available, but different alternatives at the level of laboratory experiments are promising.A theoretical background is needed to face the challenge of designing circuits for quantum computing.Pauli matrices are introduced in the $p$ -valued domain and their properties are explained.The Vilenkin-Chrestenson matrix is shown to produce superposition of states.Entanglement of quantum states in the $p$ -valued environment is introduced and its measurement effect is illustrated.It is shown that in the $p$ -valued domain, the binary Toffoli gate may be given different generalizations with different functionalities.An ancillary-free realization of a new generalized $p$ -valued Toffoli gate based on Muthukrishnan-Stroud elementary gates is presented, its functionality is extended to two kinds of control, and a proof of its performance is given.

Title: Quadrature squeezing and entanglement in a self phase locked optical parametric oscillator
Abstract: We report on an experiment using an OPO self phase locked via a birefringent waveplate placed inside the cavity emitting signal and idler beams which are entangled and/or squeezed depending on the waveplate parameters

Title: Entanglement entropy and quantum field theory
Abstract: We carry out a systematic study of entanglement entropy in relativisticquantum field theory. This is defined as the von Neumann entropy S_A=-Tr rho_Alog rho_A corresponding to the reduced density matrix rho_A of a subsystem A.For the case of a 1+1-dimensional critical system, whose continuum limit is aconformal field theory with central charge c, we re-derive the resultS_A\sim(c/3) log(l) of NAME_1 et al. when A is a finite interval of length NAME_2 an infinite system, and extend it to many other cases: finite systems,finitetemperatures, and when A consists of an arbitrary number of disjoint intervals.For such a system away from its critical point, when the correlation length \xiis large but finite, we show that S_A\sim{\cal A}(c/6)\log\xi, where \cal A isthe number of boundary points of A. These results  Avoid using the following keywords: background, text, abstract, environment
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