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Quantum backaction and noise interference in asymmetric two-cavity optomechanical systems
Quantum Physics · Submitted 6 Apr 2016
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We explicitly demonstrate how quantum noise interference controls linear backaction effects, and show that this interference persists even outside the adiabatic limit.
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The abstract, sentence by sentence
We study the effect of cavity damping asymmetries on backaction in a "membrane-in-the-middle" optomechanical system, where a mechanical mode modulates the coupling between two photonic modes. We show that in the adiabatic limit, this system generically realizes a dissipative optomechanical coupling, with an effective position-dependent photonic damping rate. The resulting quantum noise interference can be used to ground-state cool a mechanical resonator in the unresolved sideband regime. We explicitly demonstrate how quantum noise interference controls linear backaction effects, and show that this interference persists even outside the adiabatic limit. For a one-port cavity in the extreme bad-cavity limit, the interference allows one to cancel all linear backaction effects. This allows continuous measurements of position-squared, with no stringent constraints on the single-photon optomechanical coupling strength. In contrast, such a complete cancellation is not possible in the good cavity limit. This places strict bounds on the optomechanical coupling required for quantum non-demolition measurements of mechanical energy, even in a one-port device.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We study the effect of cavity damping asymmetries on backaction in a "membrane-in-the-middle" optomechanical system, where a mechanical mode modulates the coupling between two photonic modes. | contribution 0.94 | 0.69 | 0.05 | asserted 0.84 |
| s1 | We show that in the adiabatic limit, this system generically realizes a dissipative optomechanical coupling, with an effective position-dependent photonic damping rate. | result 0.95 | 0.90 | 0.19 | asserted 1.00 |
| s2 | The resulting quantum noise interference can be used to ground-state cool a mechanical resonator in the unresolved sideband regime. | result 0.90 | 0.79 | 0.29 | hedged possibility 0.64 |
| s3 | We explicitly demonstrate how quantum noise interference controls linear backaction effects, and show that this interference persists even outside the adiabatic limit. | result 0.78 | 0.92 | 0.26 | asserted 1.00 |
| s4 | For a one-port cavity in the extreme bad-cavity limit, the interference allows one to cancel all linear backaction effects. | result 1.00 | 0.76 | 0.17 | asserted 0.64 |
| s5 | This allows continuous measurements of position-squared, with no stringent constraints on the single-photon optomechanical coupling strength. | interpretation 0.59 | 0.73 | 0.13 | asserted 0.87 |
| s6 | In contrast, such a complete cancellation is not possible in the good cavity limit. | result 0.87 | 0.73 | 0.09 | asserted 1.00 |
| s7 | This places strict bounds on the optomechanical coupling required for quantum non-demolition measurements of mechanical energy, even in a one-port device. | interpretation 0.85 | 0.79 | 0.21 | asserted 1.00 |
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Original abstract
We study the effect of cavity damping asymmetries on backaction in a "membrane-in-the-middle" optomechanical system, where a mechanical mode modulates the coupling between two photonic modes. We show that in the adiabatic limit, this system generically realizes a dissipative optomechanical coupling, with an effective position-dependent photonic damping rate. The resulting quantum noise interference can be used to ground-state cool a mechanical resonator in the unresolved sideband regime. We explicitly demonstrate how quantum noise interference controls linear backaction effects, and show that this interference persists even outside the adiabatic limit. For a one-port cavity in the extreme bad-cavity limit, the interference allows one to cancel all linear backaction effects. This allows continuous measurements of position-squared, with no stringent constraints on the single-photon optomechanical coupling strength. In contrast, such a complete cancellation is not possible in the good cavity limit. This places strict bounds on the optomechanical coupling required for quantum non-demolition measurements of mechanical energy, even in a one-port device.
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