Speaker
Dr.
Carlos Sabín
(Instituto de Física Fundamental, CSIC)
Description
We will discuss several schemes for simulating relativistic motion in superconducting circuit architectures. As a first example, we show how the dynamical modulation of the qubit-field coupling strength in a circuit quantum electrodynamics architecture mimics the motion of the qubit at relativistic speeds. This allows us to propose a realistic experiment to detect microwave photons coming from simulated acceleration radiation [1]. We show that this accelerated radiation can be used to generate entanglement between a pair of qubits [2]. Moreover, we discuss the effects of relativistic motion on single-atom and two-atom Dicke superradiance [2]. Finally, we show that it is possible to simulate effective velocities which even exceed the speed of light in the medium, giving rise to the quantum counterpart of Cerenkov radiation, namely Ginzburg radiation [3].
We propose as well an implementation of a twin-paradox scenario in superconducting circuits, with velocities as large as a few percent of the speed of light [4]. Ultrafast modulation of the boundary conditions for the electromagnetic field in a microwave cavity simulates a clock moving at relativistic speeds. Since our cavity has a finite length, the setup allows us to investigate the role of clock size as well as interesting quantum effects on time dilation. In particular, our theoretical results show that the time dilation increases for larger cavity lengths and is shifted due to quantum particle creation.
The combination of both techniques generates a toolbox for studying relativistic phenomena in quantum field theory with superconducting circuits. We will discuss some possible future applications.
Primary author
Dr.
Carlos Sabín
(Instituto de Física Fundamental, CSIC)
