Dissipative-coupling-assisted laser cooling: limitations and perspectives

• URL: http://arxiv.org/abs/2007.13650v2
• Date: Wed, 14 Oct 2020 14:59:19 GMT
• Title: Dissipative-coupling-assisted laser cooling: limitations and perspectives
• Authors: Alexander K. Tagantsev
• Abstract summary: We present a comprehensive analysis of a protocol which reveals its very high sensitivity to small imperfections such as an additional dissipation. A detailed comparison of the cooling protocol in question with the dispersive-coupling-assisted protocols which use the red sideband excitation or feedback is presented.
• Score: 91.3755431537592
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The recently identified possibility of ground-state cooling of a mechanical oscillator in the unresolved sideband regime by combination of the dissipative and dispersive optomechanical coupling under the red sideband excitation [Phys. Rev. A 88, 023850 (2013)], is currently viewed as a remarkable finding. We present a comprehensive analysis of this protocol, which reveals its very high sensitivity to small imperfections such as an additional dissipation, the inaccuracy of the optimized experimental settings, and the inaccuracy of the theoretical framework adopted. The impact of these imperfections on the cooling limit is quantitatively assessed. A very strong effect on the cooling limit is found from the internal cavity decay rate which even being small compared with the detection rate may drastically push that limit up, questioning the possibility of the ground state cooling. Specifically, the internal loss can only be neglected if the ratio of the internal decay rate to the detection rate is much smaller than the ratio of the cooling limit predicted by the protocol to the common dispersive-coupling assisted sideband cooling limit. More over, we establish that the condition of applicability of theory of that protocol is the requirement that the latter ratio is much smaller than one. A detailed comparison of the cooling protocol in question with the dispersive-coupling-assisted protocols which use the red sideband excitation or feedback is presented.

Related papers

• Something from Nothing: A Theoretical Framework for Enhancing or Enabling Cooling of a Mechanical Resonator via the anti-Stokes or Stokes Interaction and Zero-Photon Detection [5.894558519564981]
  We develop a theoretical framework to describe how zero-photon detection may be utilized to enhance laser cooling via the anti-Stokes interaction. We discuss how the cooling depends on the system parameters such as detection efficiency and optomechanical cooperativity.
  arXiv  Detail & Related papers  (2024-08-03T10:25:15Z)
• Model-based Optimization of Superconducting Qubit Readout [59.992881941624965]
  We demonstrate model-based readout optimization for superconducting qubits. We observe 1.5% error per qubit with a 500ns end-to-end duration and minimal excess reset error from residual resonator photons. This technique can scale to hundreds of qubits and be used to enhance the performance of error-correcting codes and near-term applications.
  arXiv  Detail & Related papers  (2023-08-03T23:30:56Z)
• Theory of coherent interaction-free detection of pulses [0.0]
  Quantum physics allows an object to be detected even in the absence of photon absorption, by the use of so-called interaction-free measurements. We provide a formulation of this protocol using a three-level system, where the object to be detected is a pulse coupled resonantly into the second transition. We perform an in-depth analytical and numerical analysis of the coherent protocol, where coherent interaction between the object and the detector replaces the projective operators.
  arXiv  Detail & Related papers  (2023-07-11T12:35:49Z)
• Quantum geometry and bounds on dissipation in slowly driven quantum systems [0.0]
  We show that heat production in slowly driven quantum systems is linked to the topological structure of the driving protocol. Our results bridge topological phenomena and energy dissipation in slowly driven quantum systems.
  arXiv  Detail & Related papers  (2023-06-29T18:00:03Z)
• Sideband Cooling of a Trapped Ion in Strong Sideband Coupling Regime [5.739846293346471]
  We study the ground state cooling of a trapped ion in the strong sideband coupling regime. We show that by properly tuning the coupling lasers a cooling rate proportional to the linewidth can be achieved.
  arXiv  Detail & Related papers  (2022-11-16T13:10:49Z)
• Suppressing Amplitude Damping in Trapped Ions: Discrete Weak Measurements for a Non-unitary Probabilistic Noise Filter [62.997667081978825]
  We introduce a low-overhead protocol to reverse this degradation. We present two trapped-ion schemes for the implementation of a non-unitary probabilistic filter against amplitude damping noise. This filter can be understood as a protocol for single-copy quasi-distillation.
  arXiv  Detail & Related papers  (2022-09-06T18:18:41Z)
• Intrinsic mechanisms for drive-dependent Purcell decay in superconducting quantum circuits [68.8204255655161]
  We find that in a wide range of settings, the cavity-qubit detuning controls whether a non-zero photonic population increases or decreases qubit decay Purcell. Our method combines insights from a Keldysh treatment of the system, and Lindblad theory.
  arXiv  Detail & Related papers  (2021-06-09T16:21:31Z)
• State leakage during fast decay and control of a superconducting transmon qubit [0.0]
  We study the dynamics and control of a superconducting transmon using the numerically exact Liouville-von Neumann equation approach. We find significant short-time state leakage due to the strong coupling to the bath.
  arXiv  Detail & Related papers  (2020-11-20T15:13:50Z)
• Assessment of weak-coupling approximations on a driven two-level system under dissipation [58.720142291102135]
  We study a driven qubit through the numerically exact and non-perturbative method known as the Liouville-von equation with dissipation. We propose a metric that may be used in experiments to map the regime of validity of the Lindblad equation in predicting the steady state of the driven qubit.
  arXiv  Detail & Related papers  (2020-11-11T22:45:57Z)
• Controlling Rayleigh-B\'enard convection via Reinforcement Learning [62.997667081978825]
  The identification of effective control strategies to suppress or enhance the convective heat exchange under fixed external thermal gradients is an outstanding fundamental and technological issue. In this work, we explore a novel approach, based on a state-of-the-art Reinforcement Learning (RL) algorithm. We show that our RL-based control is able to stabilize the conductive regime and bring the onset of convection up to a Rayleigh number.
  arXiv  Detail & Related papers  (2020-03-31T16:39:25Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.