Remote Cooling of Spin-ensembles through a Spin-mechanical Hybrid Interface (2403.16839v3)
Abstract: We present a protocol for the ground-state cooling of a tripartite hybrid quantum system, in which a macroscopic oscillator acts as a mediator between a single probe spin and a remote spin ensemble. In the presence of weak dispersive coupling between the spins and the oscillator, cooling of the oscillator and the ensemble spins can be achieved by exploiting the feedback from frequent measurements of the single probe spin. We explore the parameter regimes necessary to cool the ensemble, the oscillator, or both to their thermal ground states. This novel cooling protocol shows that, even with only weak dispersive coupling, energy transfer-like effects can be obtained by simply manipulating the probe spin. These results not only contribute to the development of a practical solution for cooling/polarizing large spin ensembles, but also provide a relatively simple means of tuning the dynamics of a hybrid system. The proposed cooling protocol thus has broader implications for advancing various quantum technology applications, such as macroscopic quantum state generation and remote sensing.
- S. Wehner, D. Elkouss, and R. Hanson, Quantum internet: A vision for the road ahead, Science 362, 10.1126/science.aam9288 (2018).
- V. Lordi and J. M. Nichol, Advances and opportunities in materials science for scalable quantum computing, MRS Bulletin 46, 589 (2021).
- Y. Wang, Using spins in diamond for quantum technologies, Ph.D. thesis, Delft University of Technology (2023).
- K. Fujii and K. Nakajima, Harnessing disordered-ensemble quantum dynamics for machine learning, Phys. Rev. Appl. 8, 024030 (2017).
- D. D. Bhaktavatsala Rao, N. Bar-Gill, and G. Kurizki, Generation of macroscopic superpositions of quantum states by linear coupling to a bath, Phys. Rev. Lett. 106, 010404 (2011).
- Y. Wang and B. M. Terhal, Preparing dicke states in a spin ensemble using phase estimation, Phys. Rev. A 104, 032407 (2021).
- H. Hakoshima and Y. Matsuzaki, Efficient detection of inhomogeneous magnetic fields from a single spin with dicke states, Phys. Rev. A 102, 042610 (2020).
- Q. Ansel, A. D. Chepelianskii, and J. Lages, Enhancing quantum exchanges between two oscillators, Phys. Rev. A 107, 042609 (2023).
- S. R. Hartmann and E. L. Hahn, Nuclear double resonance in the rotating frame, Phys. Rev. 128, 2042 (1962).
- K. Sasaki and E. Abe, Suppression of pulsed dynamic nuclear polarization by many-body spin dynamics, Phys. Rev. Lett. 132, 106904 (2024).
- A. Browaeys and T. Lahaye, Many-body physics with individually controlled rydberg atoms, Nat. Phys. 16, 132 (2020).
- M. Aspelmeyer, T. J. Kippenberg, and F. Marquardt, Cavity optomechanics, Rev. Mod. Phys. 86, 1391 (2014).
- W. K. Schomburg, Introduction to Microsystem Design (Springer Berlin Heidelberg, 2011).
- G. S. Agarwal, Saving entanglement via a nonuniform sequence of π𝜋\piitalic_π pulses, Phys. Scr. 82, 038103 (2010).
- D. D. B. Rao, S. A. Momenzadeh, and J. Wrachtrup, Heralded control of mechanical motion by single spins, Phys. Rev. Lett. 117, 077203 (2016).
- G. S. Uhrig, Keeping a quantum bit alive by optimized pi-pulse sequences, Phys. Rev. Lett. 98, 100504 (2007).
- D. Gottesman, A. Kitaev, and J. Preskill, Encoding a qubit in an oscillator, Phys. Rev. A 64, 012310 (2001).
- B. M. Terhal and D. Weigand, Encoding a qubit into a cavity mode in circuit QED using phase estimation, Phys. Rev. A 93, 012315 (2016).
- K. Duivenvoorden, B. M. Terhal, and D. Weigand, Single-mode displacement sensor, Phys. Rev. A 95, 012305 (2017).
- Y. Wang, Quantum Error Correction with the GKP Code and Concatenation with Stabilizer Codes, Master’s thesis, RWTH-AACHEN UNIVERSITY (2017).