BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:From Colliders to Qubits: Exploring HEP with Quantum Jet Clusterin g and QFIAE DTSTART;VALUE=DATE-TIME:20240513T140000Z DTEND;VALUE=DATE-TIME:20240513T143000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23700@indico.ific.uv.es DESCRIPTION:Speakers: Leandro Cieri (IFIC)\nHigh-energy physics (HEP) expe riments generate massive datasets that challenge classical computing metho ds. Quantum computing offers promising avenues to tackle these challenges. This talk presents two applications of quantum algorithms in HEP:\n\nQuan tum Jet Clustering: This method leverages the principles of superposition and entanglement to efficiently reconstruct jets of particles emerging fro m high-energy collisions. (arXiv: 2204.06496 [hep-ph])\n\nQuantum Fourier Iterative Amplitude Estimation (QFIAE): This novel algorithm accelerates t he computation of multidimensional integrals\, a crucial task in HEP calcu lations. (arXiv: 2305.01686v2 [quant-ph])\n\nBy exploring these applicatio ns\, we demonstrate the potential of quantum computing to revolutionize HE P data analysis and unlock new discoveries in the subatomic world.\n\nhttp s://indico.ific.uv.es/event/7567/contributions/23700/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23700/ END:VEVENT BEGIN:VEVENT SUMMARY:Steady-state quantum thermodynamics with synthetic negative temper atures DTSTART;VALUE=DATE-TIME:20240513T133000Z DTEND;VALUE=DATE-TIME:20240513T140000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23691@indico.ific.uv.es DESCRIPTION:Speakers: Mohit Bera ()\nA bath with a negative temperature is a subject of intense debate in recent times. It raises fundamental questi ons not only on our understanding of negative temperature of a bath in con nection with thermodynamics but also on the possibilities of constructing devices using such baths. In this work\, we study steady-state quantum the rmodynamics involving baths with negative temperatures. A bath with a nega tive temperature is created synthetically using two baths of positive temp eratures and weakly coupling these with a qutrit system. These baths are t hen coupled to each other via a working system. At steady state\, the laws of thermodynamics are analyzed. We find that whenever the temperatures of these synthetic baths are identical\, there is no heat flow\, which reaff irms the zeroth law. There is always a spontaneous heat flow for different temperatures. In particular\, heat flows from a bath with a negative temp erature to a bath with a positive temperature which\, in turn\, implies th at a bath with a negative temperature is “hotter” than a bath with a p ositive temperature. This warrants an amendment in the Kelvin-Planck state ment of the second law\, as suggested in earlier studies. In all these pro cesses\, the overall entropy production is positive\, as required by the C lausius statement of the second law. We construct continuous heat engines operating between positive and negative temperature baths. These engines y ield maximum possible heat-to-work conversion efficiency\, that is\, unity . We also study the thermodynamic nature of heat from a bath with a negati ve temperature and find that it is thermodynamic work but with negative en tropy.\n\nhttps://indico.ific.uv.es/event/7567/contributions/23691/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23691/ END:VEVENT BEGIN:VEVENT SUMMARY:Quantum metrology with finite samples: Generalizing the quantum Cr amér-Rao bound DTSTART;VALUE=DATE-TIME:20240513T130000Z DTEND;VALUE=DATE-TIME:20240513T133000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23660@indico.ific.uv.es DESCRIPTION:Speakers: Manuel Gessner (Departamento de Física Teórica & I FIC\, Universidad de Valencia-CSIC)\nThe cornerstone of modern quantum met rology is the quantum Cramér-Rao bound and the quantum Fisher information . Under generic conditions\, this bound can be saturated by an optimal est imator and measurement\, provided that many repeated measurements on the s ystem are performed. However\, in the presence of smaller data sets it typ ically largely underestimates the error that can actually be achieved. In this talk\, we present a family of generalized bounds on the variance of u nbiased estimators that are larger than the quantum Cramér-Rao bound when the sample is small and thereby provide a more realistic limit on the ach ievable precision of a finite-sample quantum measurement. In the large-dat a limit\, the hierarchy of bounds collapses back onto the quantum Cramér- Rao bound.\n\nhttps://indico.ific.uv.es/event/7567/contributions/23660/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23660/ END:VEVENT BEGIN:VEVENT SUMMARY:Low-Level mapping techniques for quantum network applications DTSTART;VALUE=DATE-TIME:20240513T123000Z DTEND;VALUE=DATE-TIME:20240513T130000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23658@indico.ific.uv.es DESCRIPTION:Speakers: Anabel Ovide (UPV)\nQuantum networks represent a nov el approach for facilitating information\nexchange across distant location s through the deployment of various quantum\napplications\, including Quan tum Key Distribution (QKD) and blind comput-\ning. These applications are structured into programs comprising both classical\nand quantum code\, typ ically executed in a sequential manner on disparate end\nnodes. These end nodes\, constituting quantum processors\, are composed of\ncommunication a nd memory qubits that interact via entanglement and classi-\ncal communica tion protocols. Among the candidate architectures for such end\nnodes\, io n trap systems exhibit promising characteristics owing to their ex-\ntende d coherence times and precise qubit manipulation capabilities. Nonethe-\nl ess\, achieving scalability within a single quantum processor presents a n otable\nchallange\, as the introduction of additional qubits within a trap amplifies noise\nand heating phenomena\, thereby diminishing operational fidelity. To address\nthis challenge\, Trapped-ion Quantum Charge-Coupled Device (QCCD) archi-\ntectures have been proposed\, which entail the inter connection of multiple traps\nalongside the utilization of ion shuttling m echanisms for ion transfer among\ntraps. This innovative architectural fra mework necessitates the development\nof novel mapping methodologies tailor ed to quantum algorithms\, with a focus\non efficient qubit allocation\, r outing\, and operation scheduling optimized for\nquantum network applicati ons. The primary objective of such mapping tech-\nniques is to minimize io n movements\, thereby reducing circuit execution time\nand enhancing overa ll fidelity.\n\nhttps://indico.ific.uv.es/event/7567/contributions/23658/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23658/ END:VEVENT BEGIN:VEVENT SUMMARY:Physics-Informed Neural Networks for an optimal counterdiabatic qu antum computation DTSTART;VALUE=DATE-TIME:20240513T103000Z DTEND;VALUE=DATE-TIME:20240513T110000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23656@indico.ific.uv.es DESCRIPTION:Speakers: Antonio Ferrer Sánchez (ETSE\, UV)\, José J. Orqu ín Marqués ()\nWe introduce a novel methodology that leverages the stren gth of Physics-Informed Neural Networks (PINNs) to address the counterdiab atic (CD) protocol in the optimization of quantum circuits comprised of sy stems with $N_{Q}$ qubits. The primary objective is to utilize physics-ins pired deep learning techniques to accurately solve the time evolution of t he different physical observables within the quantum system. To accomplish this objective\, we embed the necessary physical information into an unde rlying neural network to effectively tackle the problem. In particular\, w e impose the hermiticity condition on all physical observables and make us e of the principle of least action\, guaranteeing the acquisition of the m ost appropriate counterdiabatic terms based on the underlying physics. The proposed approach offers a dependable alternative to address the CD drivi ng problem\, free from the constraints typically encountered in previous m ethodologies relying on classical numerical approximations. Our method pro vides a general framework to obtain optimal results from the physical obse rvables relevant to the problem\, including the external parameterization in time known as scheduling function\, the gauge potential or operator inv olving the non-adiabatic terms\, as well as the temporal evolution of the energy levels of the system\, among others. The main applications of this methodology have been the $\\mathrm{H_{2}}$ and $\\mathrm{LiH}$ molecules\ , represented by a 2-qubit and 4-qubit systems employing the STO-3G basis. The presented results demonstrate the successful derivation of a desirabl e decomposition for the non-adiabatic terms\, achieved through a linear co mbination utilizing Pauli operators. This attribute confers significant ad vantages to its practical implementation within quantum computing algorith ms.\n\nhttps://indico.ific.uv.es/event/7567/contributions/23656/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23656/ END:VEVENT BEGIN:VEVENT SUMMARY:Machine Learning for maximizing the memristivity of single and cou pled quantum memristors DTSTART;VALUE=DATE-TIME:20240513T100000Z DTEND;VALUE=DATE-TIME:20240513T103000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23657@indico.ific.uv.es DESCRIPTION:Speakers: Carlos Hernani Morales (ETSE\, UV)\nWe propose machi ne learning (ML) methods to characterize the memristive properties of sing le and coupled quantum memristors. We show that maximizing the memristivit y leads to large values in the degree of entanglement of two quantum memri stors\, unveiling the close relationship between quantum correlations and memory. Our results strengthen the possibility of using quantum memristors as key components of neuromorphic quantum computing.\n\nhttps://indico.if ic.uv.es/event/7567/contributions/23657/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23657/ END:VEVENT BEGIN:VEVENT SUMMARY:Error-aware quantum circuit compilation DTSTART;VALUE=DATE-TIME:20240513T093000Z DTEND;VALUE=DATE-TIME:20240513T100000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23659@indico.ific.uv.es DESCRIPTION:Speakers: Laura Rodríguez (UPV)\nReliably executing quantum a lgorithms on noisy intermediate-scale quantum (NISQ) devices is\nchallengi ng\, as they are severely constrained and prone to errors. Efficient quant um circuit\ncompilation techniques are therefore crucial for overcoming th eir limitations and dealing with\ntheir high error rates. These techniques consider the quantum hardware restrictions\, such as the\nlimited qubit c onnectivity\, and perform some transformations to the original circuit so that it can\nbe executed on a given quantum processor. Certain compilation methods use error information\nbased on calibration data to further impro ve the success probability or the fidelity of the circuit to\nbe run. Howe ver\, it is uncertain to what extent incorporating calibration information in the\ncompilation process can enhance the circuit performance. For inst ance\, considering the most\nrecent error data provided by vendors after c alibrating the processor might not be functional\nenough as quantum system s are subject to drift\, making the latest calibration data obsolete withi n\nminutes.\nIn this talk\, we will discuss how different usage of calibra tion data impacts the circuit fidelity\, by\nusing several compilation tec hniques and quantum processors (IBM Perth and Brisbane). To this\naim\, we will present a framework that incorporates some of the state-of-the-art n oise-aware and\nnon-noise-aware compilation techniques and allows the user to perform fair comparisons under\nsimilar processor conditions. Our expe riments yield valuable insights into the effects of noise-\naware methodol ogies and the employment of calibration data. The main finding is that pre -\nprocessing historical calibration data can improve fidelity when real-t ime calibration data is not\navailable due to factors such as cloud servic e latency and waiting queues between compilation\nand execution on the qua ntum backend.\n\nhttps://indico.ific.uv.es/event/7567/contributions/23659/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23659/ END:VEVENT BEGIN:VEVENT SUMMARY:Digital-analog quantum convolutional neural networks for image cla ssification DTSTART;VALUE=DATE-TIME:20240513T083000Z DTEND;VALUE=DATE-TIME:20240513T090000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23655@indico.ific.uv.es DESCRIPTION:Speakers: Carlos Flores Garrigós (ETSE\, UV)\nWe propose digi tal-analog quantum kernels for enhancing the detection of complex features in the classification of images. We consider multipartite-entangled analo g blocks\, stemming from native Ising interactions in neutral-atom quantum processors\, and individual operations as digital steps to implement the protocol. To further improving the detection of complex features\, we appl y multiple quantum kernels by varying the qubit connectivity according to the hardware constraints. An architecture that combines non-trainable quan tum kernels and standard convolutional neural networks is used to classify realistic medical images\, from breast cancer and pneumonia diseases\, wi th a significantly reduced number of parameters. Despite this fact\, the m odel exhibits better performance than its classical counterparts and achie ves comparable metrics according to public benchmarks. These findings demo nstrate the relevance of digital-analog encoding\, paving the way for surp assing classical models in image recognition approaching us to quantum-adv antage regimes.\n\nhttps://indico.ific.uv.es/event/7567/contributions/2365 5/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23655/ END:VEVENT BEGIN:VEVENT SUMMARY:Bell states with three component strongly interacting few-atom sys tems DTSTART;VALUE=DATE-TIME:20240513T080000Z DTEND;VALUE=DATE-TIME:20240513T083000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23654@indico.ific.uv.es DESCRIPTION:Speakers: Miguel Ángel García-March (UPV)\nWe discuss the co mplete ground-state phase diagram for a one-dimensional ultracold few-atom triple mixture of interacting bosons trapped harmonically as the differen t coupling constant strengths range from zero to strong repulsive interac tions. These results show that there are new appealing ground-state phases with various correlations\, coherence and spatial localization stemming f rom strongly repulsive interactions.We pay particular attention to the reg ime in which atomic Bell states can be found and manipulated. We discuss t heir interest as a system valid to implement quantum gates experimentally. \n\nhttps://indico.ific.uv.es/event/7567/contributions/23654/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23654/ END:VEVENT BEGIN:VEVENT SUMMARY:A Feynman propagator as a qubit DTSTART;VALUE=DATE-TIME:20240513T073000Z DTEND;VALUE=DATE-TIME:20240513T080000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23653@indico.ific.uv.es DESCRIPTION:Speakers: Germán Rodrigo ((IFIC\, Universidad de Valencia-CSI C))\nTheoretical predictions at high-energy colliders are based on encodin g the quantum fluctuations that occur at very short distances by Feynman d iagrams. These diagrams are made up of interaction vertices and propagator s\, which in fact represent a quantum superposition of propagation in the two directions between two interaction vertices. Therefore\, Feynman propa gators can be identified with qubits. We analyse the consequences of this interpretation and how it can be exploited to derive a manifestly causal r epresentation of scattering amplitudes\, leading to achievable theoretical predictions in quantum field theory at very high perturbative orders.\n\n https://indico.ific.uv.es/event/7567/contributions/23653/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23653/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome DTSTART;VALUE=DATE-TIME:20240513T072000Z DTEND;VALUE=DATE-TIME:20240513T073000Z DTSTAMP;VALUE=DATE-TIME:20260421T132030Z UID:indico-contribution-7567-23652@indico.ific.uv.es DESCRIPTION:Speakers: Armando Pérez (Armando Pérez (Departamento de Fís ica Teórica & IFIC\, Universidad de Valencia-CSIC))\nhttps://indico.ific. uv.es/event/7567/contributions/23652/ LOCATION:ETSE Room "Joan Pelechano" URL:https://indico.ific.uv.es/event/7567/contributions/23652/ END:VEVENT END:VCALENDAR