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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Measurements of nanoresonator-qubit interactions in a hybrid quantum electromechanical system

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Autor(es):
Rouxinol, F. ; Hao, Y. ; Brito, F. ; Caldeira, A. O. ; Irish, E. K. ; LaHaye, M. D.
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: Nanotechnology; v. 27, n. 36 SEP 9 2016.
Citações Web of Science: 17
Resumo

Experiments to probe the basic quantum properties of motional degrees of freedom of mechanical systems have developed rapidly over the last decade. One promising approach is to use hybrid electromechanical systems incorporating superconducting qubits and microwave circuitry. However, a critical challenge facing the development of these systems is to achieve strong coupling between mechanics and qubits while simultaneously reducing coupling of both the qubit and mechanical mode to the environment. Here we report measurements of a qubit-coupled mechanical resonator system consisting of an ultra-high-frequency nanoresonator and a long coherence-time superconducting transmon qubit, embedded in a superconducting coplanar waveguide cavity. It is demonstrated that the nanoresonator and transmon have commensurate energies and transmon coherence times are one order of magnitude larger than for all previously reported qubit-coupled nanoresonators. Moreover, we show that numerical simulations of this new hybrid quantum system are in good agreement with spectroscopic measurements and suggest that the nanoresonator in our device resides at low thermal occupation number, near its ground state, acting as a dissipative bath seen by the qubit. We also outline how this system could soon be developed as a platform for implementing more advanced experiments with direct relevance to quantum information processing and quantum thermodynamics, including the study of nanoresonator quantum noise properties, reservoir engineering, and nanomechanical quantum state generation and detection. (AU)

Processo FAPESP: 12/51589-1 - Estudos sobre relações de flutuações quânticas usando Qubits supercondutores
Beneficiário:Amir Ordacgi Caldeira
Linha de fomento: Auxílio à Pesquisa - Regular