Phonon Pumping by Modulating the Ultrastrong Vacuum
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866911971639558144 |
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| author | Minganti, Fabrizio Mercurio, Alberto Mauceri, Fabio Scigliuzzo, Marco Savasta, Salvatore Savona, Vincenzo |
| author_facet | Minganti, Fabrizio Mercurio, Alberto Mauceri, Fabio Scigliuzzo, Marco Savasta, Salvatore Savona, Vincenzo |
| contents | The vacuum (i.e., the ground state) of a system in ultrastrong light-matter coupling contains particles that cannot be emitted without any dynamical perturbation and is thus called virtual. We propose a protocol for inducing and observing real mechanical excitations of a mirror enabled by the virtual photons in the ground state of a tripartite system, where a resonant optical cavity is ultrastrongly coupled to a two-level system (qubit) and, at the same time, optomechanically coupled to a mechanical resonator. Real phonons are coherently emitted when the frequency of the two-level system is modulated at a frequency comparable to that of the mechanical resonator and, therefore much lower than the optical frequency. We demonstrate that this hybrid effect is a direct consequence of the virtual photon population in the ground state. Within a classical physics analogy, attaching a weight to a spring only changes its resting position, whereas dynamically modulating the weight makes the system oscillate. In our case, however, the weight is the vacuum itself. We propose and accurately characterize a hybrid superconducting-optomechanical setup based on available state-of-the-art technology, where this effect can be experimentally observed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_15891 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Phonon Pumping by Modulating the Ultrastrong Vacuum Minganti, Fabrizio Mercurio, Alberto Mauceri, Fabio Scigliuzzo, Marco Savasta, Salvatore Savona, Vincenzo Quantum Physics The vacuum (i.e., the ground state) of a system in ultrastrong light-matter coupling contains particles that cannot be emitted without any dynamical perturbation and is thus called virtual. We propose a protocol for inducing and observing real mechanical excitations of a mirror enabled by the virtual photons in the ground state of a tripartite system, where a resonant optical cavity is ultrastrongly coupled to a two-level system (qubit) and, at the same time, optomechanically coupled to a mechanical resonator. Real phonons are coherently emitted when the frequency of the two-level system is modulated at a frequency comparable to that of the mechanical resonator and, therefore much lower than the optical frequency. We demonstrate that this hybrid effect is a direct consequence of the virtual photon population in the ground state. Within a classical physics analogy, attaching a weight to a spring only changes its resting position, whereas dynamically modulating the weight makes the system oscillate. In our case, however, the weight is the vacuum itself. We propose and accurately characterize a hybrid superconducting-optomechanical setup based on available state-of-the-art technology, where this effect can be experimentally observed. |
| title | Phonon Pumping by Modulating the Ultrastrong Vacuum |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2309.15891 |