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Author |
Ureña, J.; Sojo, A.; Bermejo-Vega, J.; Manzano, D. |
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Title |
Entanglement detection with classical deep neural networks |
Type |
Journal Article |
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Year |
2024 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci Rep |
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Volume |
14 |
Issue |
1 |
Pages |
18109 - 11pp |
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Abstract |
In this study, we introduce an autonomous method for addressing the detection and classification of quantum entanglement, a core element of quantum mechanics that has yet to be fully understood. We employ a multi-layer perceptron to effectively identify entanglement in both two- and three-qubit systems. Our technique yields impressive detection results, achieving nearly perfect accuracy for two-qubit systems and over 90% accuracy for three-qubit systems. Additionally, our approach successfully categorizes three-qubit entangled states into distinct groups with a success rate of up to 77%. These findings indicate the potential for our method to be applied to larger systems, paving the way for advancements in quantum information processing applications. |
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Address |
[Urena, Julio] CSIC, Inst Fis Corpuscular IF, Valencia 46980, Spain, Email: manzano@onsager.ugr.es |
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Nature Portfolio |
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English |
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2045-2322 |
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WOS:001284942100001 |
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no |
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Is ISI |
yes |
International Collaboration  |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
6230 |
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Author |
Verdera, A.; Torres-Sanchez, P.; Praena, J.; Porras, I. |
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Title |
Study of the out-of-field dose from an accelerator-based neutron source for boron neutron capture therapy |
Type |
Journal Article |
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Year |
2024 |
Publication |
Applied Radiation and Isotopes |
Abbreviated Journal |
Appl. Radiat. Isot. |
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Volume |
212 |
Issue |
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Pages |
111458 - 6pp |
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Keywords |
BNCT; Neutrons; Out-of-field; Equivalent dose; Ambient dose |
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Abstract |
One important issue in Boron Neutron Capture Therapy is the delivered dose to the tissues outside the tumor. An international standard for light ion beam systems sets two recommended limits for out-of-field dose based on distance from the field edge: maximum absorbed dose from all radiation types shall not exceed 0.5 % of the maximum dose at distances 15 cm to 50 cm from the field edge. At distances > 50 cm from the field edge, the maximum absorbed dose shall not exceed 0.1 %. This paper is a continuation of our previous works focused on the design of an accelerator-based neutron source for BNCT. We already designed a novel Beam Shape Assembly which meets the IAEA criteria for BNCT treatments. Using this BSA, in the present work, we characterize by Monte Carlo simulations the dose outside the neutron field. The out-of-field dose has been assessed via estimates using the ambient and equivalent dose. Also the boron uptake in healthy tissues has been analyzed for the equivalent dose computation. It is concluded that our design for a future accelerator-based source for BNCT meets reasonably well the criteria defined from other forms of radiotherapy on both equivalent and effective dose outside the field. |
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Address |
[Verdera, Antonia; Praena, Javier; Porras, Ignacio] Univ Granada, Dept Atom Mol & Nucl Phys, Granada, Spain |
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Pergamon-Elsevier Science Ltd |
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English |
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ISSN |
0969-8043 |
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Notes |
WOS:001291259700001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
6231 |
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Author |
Mehrabankar, S.; Garcia-March, M.A.; Almudever, C.G.; Perez, A. |
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Title |
Reducing the number of qubits in quantum simulations of one dimensional many-body Hamiltonians |
Type |
Journal Article |
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Year |
2024 |
Publication |
New Journal of Physics |
Abbreviated Journal |
New J. Phys. |
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Volume |
26 |
Issue |
8 |
Pages |
083023 - 17pp |
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Keywords |
Block Renormalization Group Method (BRGM); Ising Model; Quantum Simulation; NISQ Computers; Heisenberg Model |
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Abstract |
We investigate the Ising and Heisenberg models using the block renormalization group method (BRGM), focusing on its behavior across different system sizes. The BRGM reduces the number of spins by a factor of 1/2 (1/3) for the Ising (Heisenberg) model, effectively preserving essential physical features of the model while using only a fraction of the spins. Through a comparative analysis, we demonstrate that as the system size increases, there is an exponential convergence between results obtained from the original and renormalized Ising Hamiltonians, provided the coupling constants are redefined accordingly. Remarkably, for a spin chain with 24 spins, all physical features, including magnetization, correlation function, and entanglement entropy, exhibit an exact correspondence with the results from the original Hamiltonian. The study of the Heisenberg model also shows this tendency, although complete convergence may appear for a size much larger than 24 spins, and is therefore beyond our computational capabilities. The success of BRGM in accurately characterizing the Ising model, even with a relatively small number of spins, underscores its robustness and utility in studying complex physical systems, and facilitates its simulation on current NISQ computers, where the available number of qubits is largely constrained. |
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Address |
[Mehrabankar, Somayeh; Perez, Armando] Univ Valencia, Dept Fis Teor, CSIC, Burjassot 46100, Valencia, Spain, Email: mehso@uv.es |
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Publisher |
IOP Publishing Ltd |
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English |
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ISSN |
1367-2630 |
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Notes |
WOS:001295973900001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
6235 |
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Author |
Oliver-Cañamas, L.; Rovira-Escutia, J.J.; Vijande, J.; Candela-Juan, C.; Gimeno-Olmos, J.; Pujades-Claumarchirant, M.C.; Martinez-Navarro, J.A.; Zaragozá-Carrillo, A.; Garcia-Cases, F.; Ballester, F.; Perez-Calatayud, J. |
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Title |
A system for mailed dosimetric audits of 192 Ir and 60 Co HDR brachytherapy combining OSLD and radiochromic film |
Type |
Journal Article |
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Year |
2024 |
Publication |
Radiation Measurements |
Abbreviated Journal |
Radiat. Meas. |
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Volume |
173 |
Issue |
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Pages |
107101 - 8pp |
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Address |
[Oliver-Canamas, Laura] Consorci Hosp Prov Castello CHPC, Serv Radiofis & Proteccio Radiol, Castellon De La Plana 12002, Spain, Email: laura.oliver.canas@gmail.com |
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Pergamon-Elsevier Science Ltd |
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Language |
English |
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Original Title |
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Series Editor |
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ISSN |
1350-4487 |
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Conference |
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Notes |
WOS:001300927300001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
6241 |
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Author |
Vijande, J.; Carmona, V.; Lliso, F.; Ballester, F.; Perez-Calatayud, J. |
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Title |
An efficient component of the redundancy calibration program to ensure equipment stability by assaying HDR Ir-192 sources at the time of replacement |
Type |
Journal Article |
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Year |
2024 |
Publication |
Journal of Applied Clinical Medical Physics |
Abbreviated Journal |
J. Appl. Clin. Med. Phys |
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Volume |
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Issue |
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Pages |
5pp |
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Keywords |
brachytherapy |
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Abstract |
BackgroundBrachytherapy (BT) treatments involving temporary high-dose rate (HDR) sources are extensively employed in clinical practice. Ensuring the consistency of all measurement equipment at the hospital level is crucial, requiring a robust redundancy and consistency program. This enables the institution to verify the stability of the dosimetry system over time.PurposeTo describe, justify, and analyze a component of the redundancy program of the calibration protocols followed by the Radiotherapy Department of the Hospital Universitari i Polit & egrave;cnic La Fe (Val & egrave;ncia, Spain) during the last 10 years for the case of HDR BT as an additional component to ensure long term stability of the measurement equipment.MethodsAt the time the HDR BT source is replaced, its Air Kerma Strength (SK) is measured. By comparing this value with the one obtained at the time of installation (corrected by decay), a clear determination of the stability of the measurement equipment can be performed.ResultsDifference between SK,vendor and SK,hosp as a function of the measurement date is reported for a 10 years' period. All measurements are well within the +/- 3% tolerance level recommended in current international guidelines. Percentage differences of SK,hosp values at the time of replacement compared to SK,hosp ones at the time when the source was installed are within the +/- 0.5% range, reflecting oscillations around a null deviation.ConclusionsThe method proposed allows any hospital to ensure a redundancy component of the long-term stability of all equipment involved in BT measurements in a very simple and time efficient manner. Additionally, it enables the hospital to maintain a detailed log of historical differences, facilitating the identification and correction of potential systematic deviations over time. |
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Address |
[Vijande, Javier; Ballester, Facundo] Univ Valencia UV, Dept Fis Atom Mol & Nucl, Burjassot, Spain, Email: Javier.Vijande@uv.es |
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Thesis |
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Publisher |
Wiley |
Place of Publication |
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Language |
English |
Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1526-9914 |
ISBN |
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Expedition |
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Conference |
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Notes |
WOS:001306138000001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
6250 |
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Author |
Real, D.; Calvo, D. |
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Title |
Low-Resource Time-to-Digital Converters for Field Programmable Gate Arrays: A Review |
Type |
Journal Article |
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Year |
2024 |
Publication |
Sensors |
Abbreviated Journal |
Sensors |
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Volume |
24 |
Issue |
17 |
Pages |
5512 - 15pp |
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Keywords |
time-to-digital converter; field-programmable gate array; low-resource time-to-digital converters |
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Abstract |
A fundamental aspect in the evolution of Time-to-Digital Converters (TDCs) implemented within Field-Programmable Gate Arrays (FPGAs), given the increasing demand for detection channels, is the optimization of resource utilization. This study reviews the principal methodologies employed for implementing low-resource TDCs in FPGAs. It outlines the foundational architectures and interpolation techniques utilized to bolster TDC performances without unduly burdening resource consumption. Low-resource Tapped Delay Line, Vernier Ring Oscillator, and Multi-Phase Shift Counter TDCs, including the use of SerDes, are reviewed. Additionally, novel low-resource architectures are scrutinized, including Counter Gray Oscillator TDCs and interpolation expansions using Process-Voltage-Temperature stable IODELAYs. Furthermore, the advantages and limitations of each approach are critically assessed, with particular emphasis on resolution, precision, non-linearities, and especially resource utilization. A comprehensive summary table encapsulating existing works on low-resource TDCs is provided, offering a comprehensive overview of the advancements in the field. |
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Address |
[Real, Diego; Calvo, David] Univ Valencia, IFIC Inst Fis Corpuscular, CSIC, C Catedrat Jose Beltran 2, Paterna 46980, Spain, Email: real@ific.uv.es |
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Publisher |
Mdpi |
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English |
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Notes |
WOS:001311766100001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
6254 |
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Author |
Alves, J.M. |
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Title |
Controlling the flavour changing neutral couplings of multi-Higgs doublets models through unitary matrices |
Type |
Journal Article |
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Year |
2024 |
Publication |
European Physical Journal C |
Abbreviated Journal |
Eur. Phys. J. C |
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Volume |
84 |
Issue |
9 |
Pages |
929 - 7pp |
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Abstract |
In this paper, we introduce unitary flavour violation to produce multi-Higgs doublets models where all flavour par ameters are contained within three unitary matrices. After that, we identify two of its subclasses, the left and right models, which have naturally suppressed tree-lev el flavour changing neutral couplings that easily avoid the experimental constraints derived from neutral meson mi xing. Then, we show that left models can accomodate spontaneous CP violation when all quarks have flavour changing neutr al couplings. Finally, we illustrate these concepts by considering a specific implementation with three Higgs doublets. |
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Address |
[Alves, Joao M.] Univ Valencia, CSIC, Dept Fis Teor, Valencia 46100, Spain, Email: Joao.Aparicio@uv.es |
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Publisher |
Springer |
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English |
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Edition |
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ISSN |
1434-6044 |
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Notes |
WOS:001312154700003 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
no |
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Call Number |
IFIC @ pastor @ |
Serial |
6255 |
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Author |
Fletcher, E.M.; Ballester, F.; Beaulieu, L.; Morrison, H.; Poher, A.; Rivard, M.J.; Sloboda, R.S.; Vijande, J.; Thomson, R.M. |
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Title |
Generation and comparison of 3D dosimetric reference datasets for COMS eye plaque brachytherapy using model-based dose calculations |
Type |
Journal Article |
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Year |
2024 |
Publication |
Medical Physics |
Abbreviated Journal |
Med. Phys. |
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Volume |
51 |
Issue |
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Pages |
694-706 |
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Keywords |
Monte Carlo; ocular brachytherapy; treatment planning |
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Abstract |
PurposeA joint Working Group of the American Association of Physicists in Medicine (AAPM), the European Society for Radiotherapy and Oncology (ESTRO), and the Australasian Brachytherapy Group (ABG) was created to aid in the transition from the AAPM TG-43 dose calculation formalism, the current standard, to model-based dose calculations. This work establishes the first test cases for low-energy photon-emitting brachytherapy using model-based dose calculation algorithms (MBDCAs).Acquisition and Validation MethodsFive test cases are developed: (1) a single model 6711 125I brachytherapy seed in water, 13 seeds (2) individually and (3) in combination in water, (4) the full Collaborative Ocular Melanoma Study (COMS) 16-mm eye plaque in water, and (5) the full plaque in a realistic eye phantom. Calculations are done with four Monte Carlo (MC) codes and a research version of a commercial treatment planning system (TPS). For all test cases, local agreement of MC codes was within & SIM;2.5% and global agreement was & SIM;2% (4% for test case 5). MC agreement was within expected uncertainties. Local agreement of TPS with MC was within 5% for test case 1 and & SIM;20% for test cases 4 and 5, and global agreement was within 0.4% for test case 1 and 10% for test cases 4 and 5.Data Format and Usage NotesDose distributions for each set of MC and TPS calculations are available online () along with input files and all other information necessary to repeat the calculations.Potential ApplicationsThese data can be used to support commissioning of MBDCAs for low-energy brachytherapy as recommended by TGs 186 and 221 and AAPM Report 372. This work additionally lays out a sample framework for the development of test cases that can be extended to other applications beyond eye plaque brachytherapy. |
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Address |
[Fletcher, Elizabeth M.; Thomson, Rowan M.] Carleton Univ, Phys Dept, Carleton Lab Radiotherapy Phys, Ottawa, ON, Canada, Email: rthomson@physics.carleton.ca |
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Publisher |
Wiley |
Place of Publication |
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English |
Summary Language |
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Original Title |
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Series Editor |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0094-2405 |
ISBN |
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Conference |
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Notes |
WOS:001058112300001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
5632 |
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Author |
Araujo Filho, A.A. |
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Title |
Analysis of a regular black hole in Verlinde's gravity |
Type |
Journal Article |
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Year |
2024 |
Publication |
Classical and Quantum Gravity |
Abbreviated Journal |
Class. Quantum Gravity |
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Volume |
41 |
Issue |
1 |
Pages |
015003 - 30pp |
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Keywords |
Verlinde's emergent gravity; dark matter; shadows; black hole |
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Abstract |
This work focuses on the examination of a regular black hole within Verlinde's emergent gravity, specifically investigating the Hayward-like (modified) solution. The study reveals the existence of three horizons under certain conditions, i.e. an event horizon and two Cauchy horizons. Our results indicate regions which phase transitions occur based on the analysis of heat capacity and Hawking temperature. To compute the latter quantity, we utilize three distinct methods: the surface gravity approach, Hawking radiation, and the application of the first law of thermodynamics. In the case of the latter approach, it is imperative to introduce a correction to ensure the preservation of the Bekenstein-Hawking area law. Geodesic trajectories and critical orbits (photon spheres) are calculated, highlighting the presence of three light rings. Additionally, we investigate the black hole shadows. Furthermore, the quasinormal modes are explored using third- and sixth-order Wentzel-Kramers-Brillouin approximations. In particular, we observe stable and unstable oscillations for certain frequencies. Finally, in order to comprehend the phenomena of time-dependent scattering in this scenario, we provide an investigation of the time-domain solution. |
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Address |
[Araujo Filho, A. A.] Univ Valencia, Ctr Mixto Univ Valencia, CSIC, Dept Fis Teor, Burjassot 46100, Valencia, Spain, Email: dilto@fisica.ufc.br |
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Publisher |
IOP Publishing Ltd |
Place of Publication |
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Language |
English |
Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0264-9381 |
ISBN |
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Area |
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Conference |
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Notes |
WOS:001114102700001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
5841 |
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Author |
Heidari, N.; Hassanabadi, H.; Araujo Filho, A.A.; Kriz, J.; Zare, S.; Porfirio, P.J. |
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Title |
Gravitational signatures of a non-commutative stable black hole |
Type |
Journal Article |
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Year |
2024 |
Publication |
Physics of the Dark Universe |
Abbreviated Journal |
Phys. Dark Universe |
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Volume |
43 |
Issue |
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Pages |
101382 - 13pp |
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Keywords |
Non-commutativity; Black hole; Shadows; Geodesics |
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Abstract |
This work investigates several key aspects of a non-commutative theory with mass deformation. We calculate thermodynamic properties of the system and compare our results with recent literature. We examine the quasinormal modes of massless scalar perturbations using two approaches: the WKB approximation and the Poschl-Teller fitting method. Our results indicate that stronger non-commutative parameters lead to slower damping oscillations of gravitational waves and higher partial absorption cross sections. Furthermore, we study the geodesics of massless and massive particles, highlighting that the non-commutative parameter (R) significantly impacts the paths of light and event horizons. Also, we calculate the shadows, which show that larger values of (R) correspond to larger shadow radii, and provide some constraints on (R) applying the observation of Sgr A* from the Event Horizon Telescope. Finally, we explore the deflection angle in this context. |
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Address |
[Heidari, N.; Hassanabadi, H.] Shahrood Univ Technol, Fac Phys, Shahrood, Iran, Email: heidari.n@gmail.com; |
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Publisher |
Elsevier |
Place of Publication |
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Editor |
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English |
Summary Language |
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ISSN |
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ISBN |
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Conference |
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Notes |
WOS:001126934800001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
5857 |
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| Permanent link to this record |
