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10 papers · 2 filters
Bounds on the dynamics of periodic quantum walks and emergence of the gapless and gapped Dirac equation
N. Pradeep Kumar, Radhakrishna Balu, Raymond Laflamme +1
We study the dynamics of discrete-time quantum walk using quantum coin operations, and in time-dependent periodic sequence. For the two-period quantum…
Finite sizes and smooth cutoffs in superconducting circuits
Emma McKay, Adrian Lupascu, Eduardo Martin-Martinez
We investigate the validity of two common assumptions in the modelling of superconducting circuits: first, that the superconducting qubits are pointlike, and second, that the UV be…
Quantum to classical transitions in causal relations
Katja Ried, Jean-Philippe W. MacLean, Robert W. Spekkens +1
The landscape of causal relations that can hold among a set of systems in quantum theory is richer than in classical physics. In particular, a pair of time-ordered systems can be r…
Transmission of Information in Non-Local Field Theories
Alessio Belenchia, Dionigi M. T. Benincasa, Stefano Liberati +1
The signaling between two observers in 3+1 dimensional flat spacetime coupled locally to a non-local field is considered. We show that in the case where two observers are purely ti…
Non-perturbative analysis of entanglement harvesting from coherent field states
Petar Simidzija, Eduardo Martin-Martinez
We study (non-perturbatively) the interactions of delta-coupled detectors with coherent states of a scalar field. We show that the time-evolved density matrix spectra of i) a singl…
Over the horizon: distinguishing the Schwarzschild spacetime and the spacetime using an Unruh-DeWitt detector
Keith K. Ng, Robert B. Mann, Eduardo Martin-Martinez
We show that a particle detector can distinguish the geon from the Schwarzschild black hole, even though they differ only by a topological identification beyond the…