Switchable Superradiant Phase Transition with Kerr Magnons

• URL: http://arxiv.org/abs/2302.07163v2
• Date: Wed, 13 Sep 2023 01:25:10 GMT
• Title: Switchable Superradiant Phase Transition with Kerr Magnons
• Authors: Gang Liu, Wei Xiong and Zu-Jian Ying
• Abstract summary: We show that the Kerr magnons induced SPT can exist in both cases of ignoring and including the intrinsic AT. Our work paves a potential way to manipulate the SPT against the AT in hybrid systems combining CQED and nonlinear magnonics.
• Score: 4.418740763055554
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The superradiant phase transition (SPT) has been widely studied in cavity quantum electrodynamics (CQED). However, this SPT is still subject of ongoing debates due to the no-go theorem induced by the so-called ${\bf A}^2$ term (AT). We propose a hybrid quantum system, consisting of a single-mode cavity simultaneously coupled to both a two-level system and yttrium-iron-garnet sphere supporting magnons with Kerr nonlinearity, to restore the SPT against the AT. The Kerr magnons here can effectively introduce an additional strong and tunable AT to counteract the intrinsic AT, via adiabatically eliminating the degrees of freedom of the magnons. We show that the Kerr magnons induced SPT can exist in both cases of ignoring and including the intrinsic AT. Without the intrinsic AT, the critical coupling strength can be dramatically reduced by introducing the Kerr magnons, which greatly relaxes the experimental conditions for observing the SPT. With the intrinsic AT, the forbidden SPT can be recovered with the Kerr magnons in a reversed way. Our work paves a potential way to manipulate the SPT against the AT in hybrid systems combining CQED and nonlinear magnonics.

Related papers

• Highly-tunable and strong nonreciprocity in coupled nonlinear cavity magnonics [3.3610406273903304]
  Nonreciprocity, which violates Lorentz reciprocity, plays a pivotal role in quantum information processing and networks. We propose a coupled nonlinear cavity magnonic system, consisting of two cavities, a second-order nonlinear element, and a yttrium-iron-garnet sphere for supporting Kerr magnons. Our work provides a promising avenue to realize highly-tunable nonreciprocal devices with Kerr magnons.
  arXiv  Detail & Related papers  (2023-09-17T11:46:18Z)
• Superradiant phase transition induced by the indirect Rabi interaction [14.9787678220469]
  We study the superradiant phase transition (SPT) in an indirect Rabi model. We present the analytical expression of quantum critical point in terms of the original system parameters. Considering a hybrid magnon-cavity-qubit system, we predict the squeezed cat state of magnon generated with feasible experimental parameters.
  arXiv  Detail & Related papers  (2023-02-15T07:52:27Z)
• Resolving Fock states near the Kerr-free point of a superconducting resonator [51.03394077656548]
  We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement) We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
  arXiv  Detail & Related papers  (2022-10-18T09:55:58Z)
• Parity-Time Symmetry-Enhanced Simultaneous Magnon and Photon Blockade in Cavity Magnonic System [0.0]
  We study the effect of PT-symmetric phase on the magnon statistics and hence magnon blockade. Surprisingly, although there is no photonic Kerr nonlinearity in the scheme, photon blockade can also occur simultaneously with magnon blockade.
  arXiv  Detail & Related papers  (2022-09-09T10:38:26Z)
• Spin Current Density Functional Theory of the Quantum Spin-Hall Phase [59.50307752165016]
  We apply the spin current density functional theory to the quantum spin-Hall phase. We show that the explicit account of spin currents in the electron-electron potential of the SCDFT is key to the appearance of a Dirac cone.
  arXiv  Detail & Related papers  (2022-08-29T20:46:26Z)
• Enhancing the Coherence of Superconducting Quantum Bits with Electric Fields [62.997667081978825]
  We show that qubit coherence can be improved by tuning defects away from the qubit resonance using an applied DC-electric field. We also discuss how local gate electrodes can be implemented in superconducting quantum processors to enable simultaneous in-situ coherence optimization of individual qubits.
  arXiv  Detail & Related papers  (2022-08-02T16:18:30Z)
• Continuous Dissipative Phase Transitions without Symmetry Breaking [0.0]
  Dissipative phase transitions (DPTs) of second order are often connected with spontaneous symmetry breaking ( SSB) We prove this statement to be wrong, showing that SSB is not a necessary condition for the occurrence of second-order DPTs in out-of-equilibrium open quantum systems. This new type of phase transition cannot be interpreted as a "semiclassical" bifurcation, because, after the DPT, the system steady state remains unique.
  arXiv  Detail & Related papers  (2021-10-22T16:39:59Z)
• Fast high-fidelity single-qubit gates for flip-flop qubits in silicon [68.8204255655161]
  flip-flop qubit is encoded in the states with antiparallel donor-bound electron and donor nuclear spins in silicon. We study the multilevel system that is formed by the interacting electron and nuclear spins. We propose an optimal control scheme that produces fast and robust single-qubit gates in the presence of low-frequency noise.
  arXiv  Detail & Related papers  (2021-01-27T18:37:30Z)
• A natural heavy-hole flopping mode qubit in germanium [0.0]
  Flopping mode qubits in double quantum dots (DQDs) allow for coherent spin-photon hybridization and fast qubit gates. electronic systems rely on synthetic spin-orbit interaction (SOI) by means of a magnetic field gradient as a coupling mechanism. We show that this challenging experimental setup can be avoided in heavy-hole (HH) systems in germanium (Ge) by utilizing the sizeable cubic Rashba SOI.
  arXiv  Detail & Related papers  (2020-12-18T13:17:52Z)
• Probing the coherence of solid-state qubits at avoided crossings [51.805457601192614]
  We study the quantum dynamics of paramagnetic defects interacting with a nuclear spin bath at avoided crossings. The proposed theoretical approach paves the way to designing the coherence properties of spin qubits from first principles.
  arXiv  Detail & Related papers  (2020-10-21T15:37:59Z)
• Optimal coupling of HoW$_{10}$ molecular magnets to superconducting circuits near spin clock transitions [85.83811987257297]
  We study the coupling of pure and magnetically diluted crystals of HoW$_10$ magnetic clusters to microwave superconducting coplanar waveguides. Results show that engineering spin-clock states of molecular systems offers a promising strategy to combine sizeable spin-photon interactions with a sufficient isolation from unwanted magnetic noise sources.
  arXiv  Detail & Related papers  (2019-11-18T11:03:06Z)

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.