Details
| Original language | English |
|---|---|
| Article number | 095019 |
| Journal | New Journal of Physics |
| Volume | 10 |
| Publication status | Published - 30 Sept 2008 |
| Externally published | Yes |
Abstract
In this paper, we present a scheme for ground-state cooling of a flexural mode of a nanomechanical beam incorporated in a loop-shaped Cooper-pair box (CPB) circuit. Via the Lorentz force coupling of the beam motion to circulating CPB-circuit currents, energy is transferred to the CPB qubit which acts as a dissipative two-level system. The cooling process is driven by a detuned gate voltage drive acting on the CPB. We analyze the cooling force spectrum and present analytical expressions for the cooling rate and final occupation number for a wide parameter regime. In particular, we find that cooling is optimized in a strong drive regime, and we present the necessary conditions for ground-state cooling.
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In: New Journal of Physics, Vol. 10, 095019, 30.09.2008.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ground-state cooling of a nanomechanical resonator via a Cooper-pair box qubit
AU - Jaehne, Konstanze
AU - Hammerer, Klemens
AU - Wallquist, Margareta
PY - 2008/9/30
Y1 - 2008/9/30
N2 - In this paper, we present a scheme for ground-state cooling of a flexural mode of a nanomechanical beam incorporated in a loop-shaped Cooper-pair box (CPB) circuit. Via the Lorentz force coupling of the beam motion to circulating CPB-circuit currents, energy is transferred to the CPB qubit which acts as a dissipative two-level system. The cooling process is driven by a detuned gate voltage drive acting on the CPB. We analyze the cooling force spectrum and present analytical expressions for the cooling rate and final occupation number for a wide parameter regime. In particular, we find that cooling is optimized in a strong drive regime, and we present the necessary conditions for ground-state cooling.
AB - In this paper, we present a scheme for ground-state cooling of a flexural mode of a nanomechanical beam incorporated in a loop-shaped Cooper-pair box (CPB) circuit. Via the Lorentz force coupling of the beam motion to circulating CPB-circuit currents, energy is transferred to the CPB qubit which acts as a dissipative two-level system. The cooling process is driven by a detuned gate voltage drive acting on the CPB. We analyze the cooling force spectrum and present analytical expressions for the cooling rate and final occupation number for a wide parameter regime. In particular, we find that cooling is optimized in a strong drive regime, and we present the necessary conditions for ground-state cooling.
UR - http://www.scopus.com/inward/record.url?scp=54249141126&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/10/9/095019
DO - 10.1088/1367-2630/10/9/095019
M3 - Article
AN - SCOPUS:54249141126
VL - 10
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 095019
ER -