BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Creation of Wavepackets for Quantum Chromodynamics on Quantum Comp uters DTSTART:20250219T140000Z DTEND:20250219T160000Z DTSTAMP:20260621T200028Z UID:860c2a75-78d2-4857-b6ad-9c7e7d0e050a SEQUENCE:5 CREATED:20250213T141953Z DESCRIPTION:One of the most ambitious goals of quantum simulation of quant um field theory is the description of scattering in real time\, which woul d allow not only for computation of scattering amplitudes\, but also for s tudying the collision process step by step. The initial state of such simu lation is made of typically two wavepackets moving on top of the vacuum\, whose preparation is difficult Some proposals are based on a modified adia batic transformation of free wavepackets into interacting wavepackets\, bu t this is not suitable for QCD. Other approaches used in one-dimensional l attice gauge theories rely on an adiabatic transformation from the strong coupling limit\, or on ansatzes to create the wavepackets from the full\, interacting vacuum. Here we extend a previous work to create wavepackets o f a general kind of particle from the vacuum in lattice gauge theories in one and three dimensions\, including QCD. The conceptual foundation of thi s approach is the Haag-Ruelle scattering theory\, and the only theoretical limitation is given by massless particles. In the context of digital quan tum computation\, the wavepacket creation from the vacuum is implemented w ith the technique known as LCU (linear combination of unitaries). The prep aration is performed successfully with a certain success probability\, whi ch may represent the main obstacle of our approach. LAST-MODIFIED:20250219T095048Z LOCATION:Sala de Formação Avançada Piso 2 Pavilhão de Física URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/creation-of-wavepackets-fo r-quantum-chromodynamics-on-quantum-computers/ X-ALT-DESC;FMTTYPE=text/html:

One of the most amb itious goals of quantum simulation of quantum field theory is the descript ion of scattering in real time\, which would allow not only for computatio n of scattering amplitudes\, but also for studying the collision process s tep by step. The initial state of such simulation is made of typically two wavepackets moving on top of the vacuum\, whose preparation is difficult< br/>
Some proposals are based on a modified adiabatic transformation of free wavepackets into interacting wavepackets\, but this is not suitabl e for QCD. Other approaches used in one-dimensional lattice gauge theories rely on an adiabatic transformation from the strong coupling limit\, or o n ansatzes to create the wavepackets from the full\, interacting vacuum. H ere we extend a previous work to create wavepackets of a general kind of p article from the vacuum in lattice gauge theories in one and three dimensi ons\, including QCD.

The conceptual foundation of this approach is the Haag-Ruelle scattering theory\, and the only theoretical limitation is given by massless particles. In the context of digital quantum computa tion\, the wavepacket creation from the vacuum is implemented with the tec hnique known as LCU (linear combination of unitaries). The preparation is performed successfully with a certain success probability\, which may repr esent the main obstacle of our approach.

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