Conveners
Theoretical Physics
- Jacinda Ginges
Theoretical Physics
- Jacinda Ginges
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Joan A Vaccaro (Griffith University)01/12/2025, 10:45Theoretical PhysicsInvited/Keynote talk
The violation of the discrete symmetries of charge conjugation (C), parity inversion (P), and time reversal (T) observed in high energy physics are fundamental aspects of nature. A new quantum theory [1,2] has been introduced to explore the possibility of their large-scale physical consequences. The new theory does not assume any conservation laws or equations of motion at the outset. In...
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Jannis Ruh01/12/2025, 11:15Theoretical PhysicsContributed Oral
We present a novel graph-theoretic approach to simplifying generic many-body Hamiltonians. Our primary result introduces a recursive twin-collapse algorithm, leveraging the identification and elimination of symmetric vertex pairs (twins) within the frustration graph of the Hamiltonian. This method systematically block-diagonalizes Hamiltonians, reducing complexity while preserving the...
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Flynn Linton (Monash University)01/12/2025, 11:30Theoretical PhysicsContributed Oral
Gravitational waves from cosmological phase transitions offer a novel probe of particle physics. As the early universe cooled, it may have undergone a phase transition from a metastable vacuum to the true vacuum. While the Standard Model of particle physics predicts continuous phase transitions during electroweak and QCD symmetry breaking, many extensions of the Standard Model predict...
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Marko Beocanin (University of New South Wales)01/12/2025, 11:45Theoretical PhysicsContributed Oral
The Strong CP Problem can be solved elegantly and economically by introducing a spontaneously broken, anomalous, global Peccei-Quinn (PQ) symmetry, whose Goldstone boson - the axion - dynamically cancels out the CP-violating phase. However, the global-symmetry-breaking corrections expected to arise from quantum gravity can threaten this perfect cancellation, and need to be either enormously...
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Dominic Lewis (RMIT University)01/12/2025, 12:00Theoretical PhysicsContributed Oral
Shannon theory has been a very useful tool for studying quantum field theories with an ultraviolet cutoff as simultaneously continuous and discrete on a lattice. Recently this has been extended to fields without a cutoff using wavelets, presenting free (continuous) quantum fields in n dimensions as equivalent discrete lattice theories in n+1 dimensions with potentially holographic properties....
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Jesper Levinsen (Monash University)01/12/2025, 12:15Condensed Matter & MaterialsInvited/Keynote talk
Quantum droplets are self-bound low-density configurations which may appear in ultracold gases with competing interactions. Dilute bosonic mixtures, where the attractive mean-field energy is balanced by the repulsive Lee-Huang-Yang correction stemming from quantum fluctuations, are the prototypical platform where this novel state has been first predicted [1] and shortly after experimentally...
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Enbang Li (School of Physics, EIS, University of Wollongong, NSW 2522, Australia)01/12/2025, 13:30Theoretical PhysicsInvited/Keynote talk
According to Einstein’s general theory of relativity, photons—though massless—are influenced by gravitational fields because gravity acts not as a force in the Newtonian sense but as a manifestation of spacetime curvature. In this framework, a photon follows a null geodesic, meaning its path bends when passing near massive objects due to the warping of spacetime. This leads to several key...
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Aditya Singh Tejas (Australian National University)01/12/2025, 14:00Theoretical PhysicsContributed Oral
Nuclear fusion not only promises carbon-free energy but also drives deeper insights into fundamental quantum dynamics under extreme conditions. Non-relativistic quantum scattering theory informs our broad understanding of nuclear collision processes. However, detailed theoretical insights remain elusive with conventional approaches.
In this work, we investigate a new time-dependent...
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James Vandeleur (University of New South Wales (UNSW))01/12/2025, 14:15Theoretical PhysicsContributed Oral
We present a systematic investigation of the possible phenomenological impact of residual, abelian flavour groups in the charged lepton sector. The allowed flavour structures of operators in the Standard Model Effective Field Theory (up to dimension six) lead to distinctive and observable patterns of charged lepton flavour violating processes. We illustrate the relevance of such selection...
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Simon Vedl (Macquarie University)01/12/2025, 14:30Theoretical PhysicsContributed Oral
We introduce a method of reverse holography by which a bulk metric is shown to arise from locally computable multiscale correlations of a boundary quantum field theory (QFT). The metric is obtained from the Petz-Rényi mutual information defined with input correlations computed from the continuous wavelet transform. We show for free massless fermionic and bosonic QFTs that the emerging metric...
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Weihang Zhang (UNSW Sydney)01/12/2025, 14:45Theoretical PhysicsContributed Oral
Baryon number violating (BNV) nucleon decays can serve as an interesting probe to physics beyond the Standard Model, especially in upcoming experiments with increased sensitivity. We investigate such decays using effective field theories and present relevant BNV operators at leading order in a low energy effective field theory framework extended with a light scalar. We derive current...
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