Quantum mechanical decay, Fano interference, and bound states with energy in the continuum are ubiquitous phenomena in different areas of physics. Here we experimentally demonstrate that particle statistics strongly affects quantum mechanical decay in a multiparticle system. By considering propagation of two-photon states in engineered photonic lattices, we simulate quantum decay of two noninteracting particles in a multilevel Fano-Anderson model. Remarkably, when the system sustains a bound state in the continuum, fractional decay is observed for bosonic particles, but not for fermionic ones. Complete decay in the fermionic case arises because of the Pauli exclusion principle, which forbids the bound state to be occupied by the two fermions. Our experiment indicates that particle statistics can tune many-body quantum decay from fractional to complete.

Particle statistics affects quantum decay and fano interference / A., Crespi; L., Sansoni; G., Della Valle; A., Ciamei; R., Ramponi; Sciarrino, Fabio; Mataloni, Paolo; S., Longhi; R., Osellame. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - (2015). [10.1103/PhysRevLett.114.090201]

Particle statistics affects quantum decay and fano interference

SCIARRINO, Fabio;MATALONI, Paolo;
2015

Abstract

Quantum mechanical decay, Fano interference, and bound states with energy in the continuum are ubiquitous phenomena in different areas of physics. Here we experimentally demonstrate that particle statistics strongly affects quantum mechanical decay in a multiparticle system. By considering propagation of two-photon states in engineered photonic lattices, we simulate quantum decay of two noninteracting particles in a multilevel Fano-Anderson model. Remarkably, when the system sustains a bound state in the continuum, fractional decay is observed for bosonic particles, but not for fermionic ones. Complete decay in the fermionic case arises because of the Pauli exclusion principle, which forbids the bound state to be occupied by the two fermions. Our experiment indicates that particle statistics can tune many-body quantum decay from fractional to complete.
2015
Particle statistics; fano interference; quantum decay
01 Pubblicazione su rivista::01a Articolo in rivista
Particle statistics affects quantum decay and fano interference / A., Crespi; L., Sansoni; G., Della Valle; A., Ciamei; R., Ramponi; Sciarrino, Fabio; Mataloni, Paolo; S., Longhi; R., Osellame. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - (2015). [10.1103/PhysRevLett.114.090201]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/770999
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