Julian Hauss et al 2008 New J. Phys. 10 095018 doi:10.1088/1367-2630/10/9/095018
Dissipation in circuit quantum electrodynamics: lasing and cooling of a low-frequency oscillator
Focus on Mechanical Systems at the Quantum LimitJulian Hauss1,2, Arkady Fedorov1,3, Stephan André1, Valentina Brosco1, Carsten Hutter1,4, Robin Kothari1,5, Sunil Yeshwanth1,6, Alexander Shnirman7,8,9 and Gerd Schön1,8
Show affiliationsPart of Focus on Mechanical Systems at the Quantum Limit
Superconducting qubits coupled to electric or nanomechanical resonators display effects previously studied in quantum electrodynamics (QED) as well as extensions thereof. Here, we consider a driven qubit coupled to a low-frequency oscillator and study the influence of dissipation. When the qubit is driven to perform Rabi oscillations, with Rabi frequency in resonance with the oscillator, the latter can be driven far from equilibrium. Blue detuned driving leads to a population inversion in the qubit and lasing behavior of the oscillator ('single-atom laser'). For red detuning, the qubit cools the oscillator. This behavior persists at the symmetry point where the qubit–oscillator coupling is quadratic and decoherence effects are minimized. Here, the system realizes a 'single-atom-two-photon laser'.
- PACS
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42.50.Pq Cavity quantum electrodynamics; micromasers
32.80.-t Photoionization and excitation
85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
- Subjects
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Quantum gases, liquids and solids
- Dates
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Issue 9 (September 2008)
Received 5 June 2008
Published 30 September 2008
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Dissipation in circuit quantum electrodynamics: lasing and cooling of a low-frequency oscillator
Julian Hauss et al 2008 New J. Phys. 10 095018
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