Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regime
We propose a scheme for controlling a radio-frequency mechanical resonator at the quantum level using a superconducting qubit. The mechanical part of the circuit consists of a suspended micrometer-long beam that is embedded in the loop of a superconducting quantum interference device (SQUID) and is...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2020-06-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.023335 |
| _version_ | 1797211402458365952 |
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| author | Marios Kounalakis Yaroslav M. Blanter Gary A. Steele |
| author_facet | Marios Kounalakis Yaroslav M. Blanter Gary A. Steele |
| author_sort | Marios Kounalakis |
| collection | DOAJ |
| description | We propose a scheme for controlling a radio-frequency mechanical resonator at the quantum level using a superconducting qubit. The mechanical part of the circuit consists of a suspended micrometer-long beam that is embedded in the loop of a superconducting quantum interference device (SQUID) and is connected in parallel to a transmon qubit. Using realistic parameters from recent experiments with similar devices, we show that this configuration can enable a tuneable optomechanical interaction in the single-photon ultrastrong-coupling regime, where the radiation-pressure coupling strength is larger than both the transmon decay rate and the mechanical frequency. We investigate the dynamics of the driven system for a range of coupling strengths and find an optimum regime for ground-state cooling, consistent with previous theoretical investigations considering linear cavities. Furthermore, we numerically demonstrate a protocol for generating hybrid discrete- and continuous-variable entanglement as well as mechanical Schrödinger cat states, which can be realized within the current state of the art. Our results demonstrate the possibility of controlling the mechanical motion of massive objects using superconducting qubits at the single-photon level and could enable applications in hybrid quantum technologies as well as fundamental tests of quantum mechanics. |
| first_indexed | 2024-04-24T10:25:55Z |
| format | Article |
| id | doaj.art-6b954fe2c2f54e368293db38e251a2d9 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:25:55Z |
| publishDate | 2020-06-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-6b954fe2c2f54e368293db38e251a2d92024-04-12T16:55:34ZengAmerican Physical SocietyPhysical Review Research2643-15642020-06-012202333510.1103/PhysRevResearch.2.023335Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regimeMarios KounalakisYaroslav M. BlanterGary A. SteeleWe propose a scheme for controlling a radio-frequency mechanical resonator at the quantum level using a superconducting qubit. The mechanical part of the circuit consists of a suspended micrometer-long beam that is embedded in the loop of a superconducting quantum interference device (SQUID) and is connected in parallel to a transmon qubit. Using realistic parameters from recent experiments with similar devices, we show that this configuration can enable a tuneable optomechanical interaction in the single-photon ultrastrong-coupling regime, where the radiation-pressure coupling strength is larger than both the transmon decay rate and the mechanical frequency. We investigate the dynamics of the driven system for a range of coupling strengths and find an optimum regime for ground-state cooling, consistent with previous theoretical investigations considering linear cavities. Furthermore, we numerically demonstrate a protocol for generating hybrid discrete- and continuous-variable entanglement as well as mechanical Schrödinger cat states, which can be realized within the current state of the art. Our results demonstrate the possibility of controlling the mechanical motion of massive objects using superconducting qubits at the single-photon level and could enable applications in hybrid quantum technologies as well as fundamental tests of quantum mechanics.http://doi.org/10.1103/PhysRevResearch.2.023335 |
| spellingShingle | Marios Kounalakis Yaroslav M. Blanter Gary A. Steele Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regime Physical Review Research |
| title | Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regime |
| title_full | Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regime |
| title_fullStr | Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regime |
| title_full_unstemmed | Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regime |
| title_short | Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regime |
| title_sort | flux mediated optomechanics with a transmon qubit in the single photon ultrastrong coupling regime |
| url | http://doi.org/10.1103/PhysRevResearch.2.023335 |
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