We present a general framework to tackle quantum optics problems with giant atoms, i.e. quantum emitters each coupled non-locally to a structured photonic bath (typically a lattice) of any dimension. The theory encompasses the calculation and general properties of Green's functions, atom-photon bound states, collective master equations and decoherence-free Hamiltonians (DFHs), and is underpinned by a formalism where a giant atom is formally viewed as a normal atom lying at a fictitious location. As a major application, we provide for the first time a general criterion to predict/engineer DFHs of giant atoms, which can be applied both in and out of the photonic continuum and regardless of the structure or dimensionality of the photonic bath. This is used to show novel DFHs in 2D baths such as a square lattice, photonic graphene and an extended photonic Lieb lattice.

Leonforte, L., Sun, X., Valenti, D., Spagnolo, B., Illuminati, F., Carollo, A., et al. (2024). Quantum optics with giant atoms in a structured photonic bath. QUANTUM SCIENCE AND TECHNOLOGY, 10(1) [10.1088/2058-9565/ada08d].

Quantum optics with giant atoms in a structured photonic bath

Leonforte, Luca
Primo
;
Sun, Xuejian;Valenti, Davide;Spagnolo, Bernardo;Illuminati, Fabrizio;Carollo, Angelo;Ciccarello, Francesco
Ultimo
2024-12-30

Abstract

We present a general framework to tackle quantum optics problems with giant atoms, i.e. quantum emitters each coupled non-locally to a structured photonic bath (typically a lattice) of any dimension. The theory encompasses the calculation and general properties of Green's functions, atom-photon bound states, collective master equations and decoherence-free Hamiltonians (DFHs), and is underpinned by a formalism where a giant atom is formally viewed as a normal atom lying at a fictitious location. As a major application, we provide for the first time a general criterion to predict/engineer DFHs of giant atoms, which can be applied both in and out of the photonic continuum and regardless of the structure or dimensionality of the photonic bath. This is used to show novel DFHs in 2D baths such as a square lattice, photonic graphene and an extended photonic Lieb lattice.
30-dic-2024
Settore PHYS-04/A - Fisica teorica della materia, modelli, metodi matematici e applicazioni
Leonforte, L., Sun, X., Valenti, D., Spagnolo, B., Illuminati, F., Carollo, A., et al. (2024). Quantum optics with giant atoms in a structured photonic bath. QUANTUM SCIENCE AND TECHNOLOGY, 10(1) [10.1088/2058-9565/ada08d].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/668644
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