Photon generation and entanglement in a double superconducting cavity
- URL: http://arxiv.org/abs/2207.08747v2
- Date: Tue, 4 Oct 2022 20:57:50 GMT
- Title: Photon generation and entanglement in a double superconducting cavity
- Authors: Cruz I. Velasco, Nicol\'as F. Del Grosso, Fernando C. Lombardo,
Alejandro Soba, and Paula I. Villar
- Abstract summary: We study the dynamical Casimir effect in a double superconducting cavity in a quantum electrodynamics architecture.
We study the creation of photons when the walls oscillate harmonically with a small amplitude.
- Score: 105.54048699217668
- License: http://creativecommons.org/publicdomain/zero/1.0/
- Abstract: We study the dynamical Casimir effect in a double superconducting cavity in a
circuit quantum electrodynamics architecture. Parameters in the quantum circuit
are chosen in such a way the superconducting cavity can mimic a double cavity,
formed by two perfectly conducting outer walls and a dielectric one, with
arbitrary permittivity separating both halves. We undertake a spectral analysis
of the cavity, showing that the spectrum varies significantly depending on the
values of the susceptibility of the dielectric mirror and the relative lengths
of both cavities. We study the creation of photons when the walls oscillate
harmonically with a small amplitude. Furthermore, we explore the possibility of
entangling two uncoupled cavities, starting from a symmetric double cavity and
having both of its halves become uncoupled at a later given instant. We
consider both cases: (i) when the field is initially in a vacuum state and (ii)
the situation in which photon creation via the dynamical Casimir effect has
already taken place. We show that the cavities become entangled in both cases
but, in the latter, the quantum correlation between individual modes can be
greatly increased at the cost of diminishing the entanglement between most
pairs of modes.
Related papers
- Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide.
When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits.
We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
arXiv Detail & Related papers (2024-08-30T15:54:33Z) - Photon Generation in Double Superconducting Cavities: Quantum Circuits Implementation [41.94295877935867]
We studied photon generation due to the Dynamical Casimir Effect (DCE) in a one dimensional (1+1) double superconducting cavity.
The total length of the double cavity $L$, the difference in length between the two cavities $Delta L$, and the electric susceptibility $chi$ are tunable parameters.
arXiv Detail & Related papers (2024-07-19T14:33:45Z) - Cavity-enhanced superconductivity via band engineering [0.0]
We consider a two-dimensional electron gas interacting with a quantized cavity mode.
We find that the coupling between the electrons and the photons in the cavity enhances the superconducting gap.
arXiv Detail & Related papers (2024-05-14T14:21:02Z) - Dynamics and Resonance Fluorescence from a Superconducting Artificial Atom Doubly Driven by Quantized and Classical Fields [11.961708412157757]
Experimental demonstration of resonance fluorescence in a two-level superconducting artificial atom under two driving fields coupled to a detuned cavity.
The device consists of a transmon qubit strongly coupled to a one-dimensional transmission line and a coplanar waveguide resonator.
arXiv Detail & Related papers (2024-03-17T08:48:30Z) - Dissipative stabilization of maximal entanglement between non-identical
emitters via two-photon excitation [49.1574468325115]
Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement.
We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
arXiv Detail & Related papers (2023-06-09T16:49:55Z) - Quantum entanglement between excitons in two-dimensional materials [0.0]
The quantum entanglement between two excitons in two-dimensional materials, embedded in an optical microcavity, was investigated.
The energy eigenstates of a Jaynes-Cummings like Hamiltonian for two qubits coupled to a single cavity mode have been calculated.
arXiv Detail & Related papers (2021-12-06T14:17:03Z) - Entanglement degradation of cavity modes due to the dynamical Casimir
effect [68.8204255655161]
We study the entanglement dynamics between two cavities when one of them is harmonically shaken in the context of quantum information theory.
We find four different depending on the frequency of the motion and the spectrum of the moving cavity.
arXiv Detail & Related papers (2020-07-13T18:57:31Z) - Entanglement dynamics in dissipative photonic Mott insulators [62.997667081978825]
In spite of particle losses the quantum entanglement propagation exhibits a ballistic character with propagation speeds related to the differerent quasiparticles that are involved in the dynamics.
Our analysis reveals that photon dissipation has a strikingly asymmetric behavior in the two configurations with a much more dramatic role on the holon entanglement propagation than for the doublon case.
arXiv Detail & Related papers (2020-04-27T15:48:24Z) - Theory of waveguide-QED with moving emitters [68.8204255655161]
We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace.
We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
arXiv Detail & Related papers (2020-03-20T12:14:10Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.