Probing Non-classicality of Primordial Gravitational Waves and Magnetic Field Through Quantum Poincare Sphere

• URL: http://arxiv.org/abs/2107.12793v5
• Date: Sat, 22 Oct 2022 13:01:24 GMT
• Title: Probing Non-classicality of Primordial Gravitational Waves and Magnetic Field Through Quantum Poincare Sphere
• Authors: Debaprasad Maity, Sourav Pal
• Abstract summary: We propose a quantum Poincare sphere as an observable quantity that can hint at the quantumness of primordial gravitational waves and large-scale magnetic fields. The Poincare sphere is defined in terms of quantum stokes operators associated with the polarization of those fields, which can be measured directly.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The universe is believed to be originated from a quantum state. However, defining measurable quantities for the quantum properties in the present universe has gained interest recently. In this submission, we propose a quantum Poincare sphere as an observable quantity that can hint at the quantumness of primordial gravitational waves and large-scale magnetic fields. The Poincare sphere is defined in terms of quantum stokes operators associated with the polarization of those fields, which can be measured directly. We have further studied the effects of the initial non-BD vacuum on the power spectrum and squeezing parameter of the primordial gravitational waves and magnetic field. We have found that the initial non-BD vacuum increases the value of the squeezing parameter as expected at the end of inflation, which further enhances the possibility of measuring the quantumness of the fields under consideration. To support our results, we further explored the possible Bell violation test for a set of generalized pseudo spin operators defined in the polarization space of those fields.

Related papers

• Quantum coarsening and collective dynamics on a programmable quantum simulator [27.84599956781646]
  We experimentally study collective dynamics across a (2+1)D Ising quantum phase transition. By deterministically preparing and following the evolution of ordered domains, we show that the coarsening is driven by the curvature of domain boundaries. We quantitatively explore these phenomena and further observe long-lived oscillations of the order parameter, corresponding to an amplitude (Higgs) mode.
  arXiv  Detail & Related papers  (2024-07-03T16:29:12Z)
• Table-top nanodiamond interferometer enabling quantum gravity tests [34.82692226532414]
  We present a feasibility study for a table-top nanodiamond-based interferometer. By relying on quantum superpositions of steady massive objects our interferometer may allow exploiting just small-range electromagnetic fields.
  arXiv  Detail & Related papers  (2024-05-31T17:20:59Z)
• Embezzling entanglement from quantum fields [41.94295877935867]
  Embezzlement of entanglement refers to the counterintuitive possibility of extracting entangled quantum states from a reference state of an auxiliary system. We uncover a deep connection between the operational task of embezzling entanglement and the mathematical classification of von Neumann algebras.
  arXiv  Detail & Related papers  (2024-01-14T13:58:32Z)
• Detecting Gravitationally Interacting Dark Matter with Quantum Interference [47.03992469282679]
  We show that there is a theoretical possibility to directly detect such particles using highly sensitive gravity-mediated quantum phase shifts. In particular, we consider a protocol utilizing Josephson junctions.
  arXiv  Detail & Related papers  (2023-09-15T08:22:46Z)
• Spin operator, Bell nonlocality and Tsirelson bound in quantum-gravity induced minimal-length quantum mechanics [0.0]
  We show that the spin operator acquires a momentum-dependent contribution in quantum mechanics equipped with a minimal length. Among other consequences, this modification induces a form of quantum nonlocality stronger than the one arising in ordinary quantum mechanics.
  arXiv  Detail & Related papers  (2022-07-21T11:22:33Z)
• Quantum signatures of black hole mass superpositions [0.0]
  We apply our approach to analyze the dynamics of a detector in a spacetime generated by a BTZ black hole in a superposition of masses. We find that the detector exhibits signatures of quantum-gravitational effects corroborating Bekenstein's seminal conjecture concerning the quantized mass spectrum of black holes in quantum gravity.
  arXiv  Detail & Related papers  (2021-11-26T05:20:25Z)
• Quantum signatures in nonlinear gravitational waves [0.0]
  We investigate quantum signatures in gravitational waves using tools from quantum optics. We show that Squeezed-coherent gravitational waves can enhance or suppress the signal measured by an interferometer. We also show that Gaussian gravitational wave quantum states can be reconstructed from measurements over an ensemble of optical fields interacting with a single copy of the gravitational wave.
  arXiv  Detail & Related papers  (2021-11-02T17:55:53Z)
• Testing the equivalence principle and discreteness of spacetime through the $t^3$ gravitational phase with quantum information technology [0.0]
  We propose a new thought experiment, based on present-day Quantum Information Technologies, to measure quantum gravitational effects. The technique here proposed promise to reveal gravitational field fluctuations from the analysis of the noise associated to an ideal output of a measurement process of a quantum system. We find that this setup, built with massive mesoscopic particles, can potentially reveal the $t3$ gravitational phase term and thus, the BMV effect.
  arXiv  Detail & Related papers  (2021-08-19T02:10:13Z)
• Spacetime effects on wavepackets of coherent light [24.587462517914865]
  We introduce an operational way to distinguish between the overall shift in the pulse wavepacket and its genuine deformation after propagation. We then apply our technique to quantum states of photons that are coherent in the frequency degree of freedom. We find that the quantum coherence initially present can enhance the deformation induced by propagation in a curved background.
  arXiv  Detail & Related papers  (2021-06-23T14:20:19Z)
• Probing Topological Spin Liquids on a Programmable Quantum Simulator [40.96261204117952]
  We use a 219-atom programmable quantum simulator to probe quantum spin liquid states. In our approach, arrays of atoms are placed on the links of a kagome lattice and evolution under Rydberg blockade creates frustrated quantum states. The onset of a quantum spin liquid phase of the paradigmatic toric code type is detected by evaluating topological string operators.
  arXiv  Detail & Related papers  (2021-04-09T00:18:12Z)
• Position-dependent mass in strong quantum gravitational background fields [0.0]
  We study the dynamics of a particle with position-dependent mass trapped in an infinite square well. We show that, by increasing the quantum gravitational effect, the PDM of the particle increases and induces deformations of the quantum energy levels.
  arXiv  Detail & Related papers  (2020-12-18T23:18:32Z)

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.