Generation of quantum steering and interferometric power in the dynamical Casimir effect

Abstract

We analyze the role of the dynamical Casimir effect as a resource for quantum technologies, such as quantum cryptography and quantum metrology. In particular, we consider the generation of Einstein-Podolsky-Rosen steering and Gaussian interferometric power, two useful forms of asymmetric quantum correlations, in superconducting waveguides modulated by superconducting quantum interferometric devices. We show that while a certain value of squeezing is required to overcome thermal noise and give rise to steering, any nonzero squeezing produces interferometric power which in fact increases with thermal noise.

Controllable generation of photons and phonons in a coupled Bose–Einstein condensate-optomechanical cavity via the parametric dynamical Casimir effect

“…The DCE can be explained qualitatively as a particular kind of the parametric amplification of quantum vacuum fluctuations in systems with time-dependent parameters leading to photon generation. In addition to the theoretical investigations on the issue of particle generation via the DCE in a large variety of systems, ranging from cosmology to non-stationary cavity * motazedifard.ali@gmail.com † a dalafi@sbu.ac.ir ‡ mhnaderi@sci.ui.ac.ir § rokni@sci.ui.ac.ir QED [11], various theoretical schemes for practical applications of the DCE have been suggested, including generation of photons with nonclassical properties [12][13][14], generation of atomic squeezed sates [15], generation of multipartite entanglement in cavity networks [16], and generation of EPR quantum steering and Gaussian interferometric power [17]. Most of the schemes proposed until now to realize the DCE can be roughly separated into two categories: (a) the schemes based on the real mechanical motion of boundaries, e.g., mirrors of a cavity, a mechanism referred to as motion-induced DCE (MIDCE) in the literature [18]; and (b) the schemes based on the parametric amplification of vacuum fluctuations in media without moving boundaries, a process which is a kind of imitation of boundary motion and known as parametric DCE (PDCE) [19].…”

Dynamical Casimir effect in curved spacetime

“…The ability of relativistic motion (of an uncharged, apolar object) to produce nonclassical radiation from the vacuum [12] provides a strong theoretical motivation to study the DCE. In addition, the quantum nature of the radiation produced has led to investigations of its utility for a wide variety of quantum information tasks such as entanglement generation [13][14][15][16][17][18], the generation of quantum discord [19], the production of cluster states for quantum computation [20], the performance of multipartite quantum gates [21,22], quantum steering [23] and quantum communication [24].…”

Entanglement of superconducting qubits via acceleration radiation

“…For instance, the dynamical Casimir effect (DCE), produced by the modulation of the boundary conditions of the electromagnetic field at relativistic speeds, has been observed in superconducting devices [15][16][17]. Along these lines, it has been shown that DCE radiation possesses several forms of quantum correlations [18][19][20][21][22] that can be transferred to superconducting qubits [23,24]. A related phenomenon is the Unruh effect, where an accelerated detector in vacuum should detect thermal radiation [25,26].…”