@inproceedings {671,
	title = {Entanglement detection criterion for continuous variable Gaussian states from the moments of partially transposed density matrices},
	booktitle = {Proceedings of the 42nd Samahang Pisika ng Pilipinas Physics Conference},
	year = {2024},
	month = {3{\textendash}6 Jul 2024},
	pages = {SPP-2024-PB-24},
	address = {Batangas City},
	abstract = {Entanglement criteria and measures that are based on moments of the partially transposed density matrix are attractive because they are experimentally accessible, even for mixed states. In this paper, we formulate one such criterion for bipartite continuous variable Gaussian states. We demonstrate that the criterion is equally effective in measuring entanglement as the von Neumann entropy in a representative semiclassical ground state of a generalized Dicke model.},
	url = {https://proceedings.spp-online.org/article/view/SPP-2024-PB-24},
	author = {Rafael S. dela Rosa and Francis N. C. Paraan}
}
@inproceedings {delarosa2021,
	title = {Entanglement detection via quantum Fisher information in an XY dimer},
	booktitle = {Proceedings of the 39th Samahang Pisika ng Pilipinas Physics Conference},
	year = {2021},
	month = {20{\textendash}22 Oct 2021},
	pages = {SPP-2021-PA-05},
	address = {Presented online},
	abstract = {We use an entanglement criterion that is based on the quantum Fisher information to detect entanglement in thermal mixed states of an XY dimer. In the absence of an external magnetic field we find that it detects entanglement only in the anisotropic regions beyond the Ising line. Entanglement is destroyed at high temperatures, and this criterion is only able to detect entanglement at a lower threshold temperature than concurrence.},
	url = {https://proceedings.spp-online.org/article/view/SPP-2021-PA-05},
	author = {Rafael S. dela Rosa and Apolinario Miguel I. Tan and Francis N. C. Paraan}
}
@inproceedings {456,
	title = {Ground state entanglement entropy in a coupled spin-1/2 dimer with Dzyaloshinsky-Moriya interaction},
	booktitle = {Proceedings of the 36th Samahang Pisika ng Pilipinas Physics Conference},
	year = {2018},
	month = {6{\textendash}9 June 2018},
	pages = {SPP-2018-PB-52},
	address = {Puerto Princesa City, Philippines},
	abstract = {We study the ground state entanglement entropy in a spin-1/2 dimer with Dzyaloshinsky-Moriya (DM) and Heisenberg interactions in a Zeeman field. For a fixed magnitude of the DM vector, the ground state entanglement entropy increases from the ferromagnetic to the anti-ferromagnetic limits of the Heisenberg interaction. In the case of anti-ferromagnetic interactions with strong Zeeman splitting there exists a non-zero value of the DM magnitude that minimizes ground state entanglement. A region of the ground state phase diagram is also described where a critical DM magnitude separates separable and maximally entangled ground states.},
	url = {https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-52},
	author = {Rafael S. dela Rosa and Francis N. C. Paraan}
}
@conference {435,
	title = {Entanglement entropy in a spin-boson model and level crossings in an Ising dimer with Dzyaloshinskii-Moriya interaction},
	year = {2017},
	month = {20{\textendash}24 Nov 2017},
	pages = {P.11},
	publisher = {2017 ICTP Asian Network School and Workshop on Complex Condensed Matter Systems},
	address = {Institute of Physics, Vietnam Academy of Science and Technology, Hanoi, Vietnam},
	abstract = {We calculate the entanglement entropy between a spin and bosonic modes in a spin-boson model using different ground state ansatze. The entanglement entropy saturates exponentially to a constant as the value of the displacement parameters of the boson modes is increased. We also search for level crossings in a system composed of two spins coupled by a Dzyaloshinkskii-Moriya interaction.},
	url = {https://www.iop.vast.ac.vn/theor/conferences/asian/2017/program.php},
	author = {Rafael S. dela Rosa and Francis N. C. Paraan}
}
@article {Seroje2015,
	title = {Effective thermodynamics of isolated entangled squeezed and coherent states},
	journal = {Eur. J. Phys.},
	volume = {36},
	number = {5},
	year = {2015},
	pages = {055051},
	abstract = {The R{\'e}nyi entanglement entropy is calculated exactly for mode-partitioned isolated systems such as the two-mode squeezed state and the multi-mode Silbey{\textendash}Harris polaron ansatz state. Effective thermodynamic descriptions of the correlated partitions are constructed to present quantum information theory concepts in the language of thermodynamics. Boltzmann weights are obtained from the entanglement spectrum by deriving the exact relationship between an effective temperature and the physical entanglement parameters. The partition function of the resulting effective thermal theory can be obtained directly from the single-copy entanglement.},
	doi = {10.1088/0143-0807/36/5/055051},
	author = {King Karl R Seroje and Rafael S. dela Rosa and Francis N. C. Paraan}
}
@inproceedings {delarosa-spp-2015,
	title = {Entanglement entropy of the Silbey-Harris polaron ansatz for a spin-boson model},
	booktitle = {Proceedings of the 33rd Samahang Pisika ng Pilipinas Physics Congress},
	year = {2015},
	month = {3{\textendash}6 Jun 2015},
	pages = {SPP-2015-PB-47},
	address = {University of Northern Philippines, Vigan City},
	abstract = {<div>We obtained the entanglement entropy between a qubit and a harmonic oscillator bath using a Silbey-Harris polaron ansatz. With the assumption that a single mode frequency is dominant, we calculated the exact dependence of the von Neumann entropy on the displacement parameter. The entanglement entropy increases and saturates exponentially fast to its maximum value of ln2 as the magnitude of the displacement increases. We also showed that the entanglement entropy depends on the sum of complex squares of each displacement when the bath is a multi-mode coherent state.</div>},
	author = {Rafael S. dela Rosa and Francis N. C. Paraan}
}
@inproceedings {delarosa-spp-2014,
	title = {Mode entanglement in squeezed coherent and displaced squeezed states},
	booktitle = {Proceedings of the 32nd Samahang Pisika ng Pilipinas Physics Congress},
	year = {2014},
	month = {17{\textendash}20 Oct 2014},
	pages = {SPP2014-5A-7},
	address = {University of the Philippines Diliman, Quezon City},
	abstract = {<div>We study mode entanglement in four quantum states (coherent state, squeezed vacuum state, displaced squeezed state, squeezed coherent state), which are generated from a bosonic two-mode vacuum state by the action of displacement and squeezing operators. The mode entanglement entropy in these states is calculated and shown to depend only on the squeezing magnitude.</div>},
	author = {Rafael S. dela Rosa and King Karl R Seroje and Francis N. C. Paraan}
}