Joint estimation of a two-phase spin rotation beyond classical limit
- URL: http://arxiv.org/abs/2312.10480v1
- Date: Sat, 16 Dec 2023 15:21:00 GMT
- Title: Joint estimation of a two-phase spin rotation beyond classical limit
- Authors: Jiahao Cao, Xinwei Li, Tianwei Mao, Wenxin Xu, Li You
- Abstract summary: In diverse application scenarios, the estimation of more than one single parameter is often required.
We report quantum-enhanced measurement of simultaneous spin rotations around two axes, making use of spin-nematic squeezing in an atomic Bose-Einstein condensate.
- Score: 11.887327647811661
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum metrology employs entanglement to enhance measurement precision. The
focus and progress so far have primarily centered on estimating a single
parameter. In diverse application scenarios, the estimation of more than one
single parameter is often required. Joint estimation of multiple parameters can
benefit from additional advantages for further enhanced precision. Here we
report quantum-enhanced measurement of simultaneous spin rotations around two
orthogonal axes, making use of spin-nematic squeezing in an atomic
Bose-Einstein condensate. Aided by the $F=2$ atomic ground hyperfine manifold
coupled to the nematic-squeezed $F=1$ states as an auxiliary field through a
sequence of microwave (MW) pulses, simultaneous measurement of multiple spin-1
observables is demonstrated, reaching an enhancement of 3.3 to 6.3 decibels
(dB) beyond the classical limit over a wide range of rotation angles. Our work
realizes the first enhanced multi-parameter estimation using entangled massive
particles as a probe. The techniques developed and the protocols implemented
also highlight the application of two-mode squeezed vacuum states in
quantum-enhanced sensing of noncommuting spin rotations simultaneously.
Related papers
- Quantum-enhanced sensing of spin-orbit coupling without fine-tuning [0.0]
Heisenberg limited enhanced precision is achieved across a wide range of parameters.
We have demonstrated quantum enhanced sensitivity for both single particle and interacting many-body probes.
arXiv Detail & Related papers (2024-11-01T14:00:23Z) - Multi-parameter quantum metrology with stabilized multi-mode squeezed
state [13.954530422962135]
We generate and stabilize a two-mode squeezed state along two secular motional modes in a vibrating trapped ion with reservoir engineering.
We demonstrate an estimation of two simultaneous collective displacements along the squeezed axes, achieving improvements surpassing the classical limit.
The practical implications of our findings span a wide range of applications, including quantum sensing, quantum imaging, and various fields.
arXiv Detail & Related papers (2023-12-16T08:32:09Z) - Finite Pulse-Time Effects in Long-Baseline Quantum Clock Interferometry [45.73541813564926]
We study the interplay of the quantum center-of-mass $-$ that can become delocalized $-$ together with the internal clock transitions.
We show at the example of a Gaussian laser beam that the proposed quantum-clock interferometers are stable against perturbations from varying optical fields.
arXiv Detail & Related papers (2023-09-25T18:00:03Z) - Scalable spin squeezing in a dipolar Rydberg atom array [2.392520546501394]
We show how to enhance the precision of measurements beyond the standard quantum limit.
To do so, one can reshape the quantum projection noise -- a strategy known as squeezing.
We present two independent refinements: first, using a multistep spin-squeezing protocol allows us to further enhance the squeezing by approximately 1 dB, and second, leveraging Floquet engineering to realize Heisenberg interactions.
arXiv Detail & Related papers (2023-03-14T16:35:17Z) - Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom.
We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
arXiv Detail & Related papers (2023-03-13T13:06:40Z) - Towards Improved Quantum Simulations and Sensing with Trapped 2D Ion
Crystals via Parametric Amplification [0.0]
Improving coherence is a fundamental challenge in quantum simulation and sensing experiments with trapped ions.
Here we discuss, experimentally demonstrate, and estimate the potential impacts of two different protocols.
The experiments are performed on 2D crystal arrays of approximately one hundred $9$Be$+$ ions confined in a Penning trap.
arXiv Detail & Related papers (2023-01-19T17:45:48Z) - Quantum-enhanced multiparameter estimation and compressed sensing of a
field [0.0]
We show that a significant quantum gain corresponding to squeezed or over-squeezed spin states can be obtained by measuring the Hadamard coefficients of a 1D or 2D signal.
We give examples of applications to scalar or vector field mapping and compressed sensing.
arXiv Detail & Related papers (2022-08-01T06:54:05Z) - Tuning long-range fermion-mediated interactions in cold-atom quantum
simulators [68.8204255655161]
Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior.
Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
arXiv Detail & Related papers (2022-03-31T13:32:12Z) - Quantum probes for the characterization of nonlinear media [50.591267188664666]
We investigate how squeezed probes may improve individual and joint estimation of the nonlinear coupling $tildelambda$ and of the nonlinearity order $zeta$.
We conclude that quantum probes represent a resource to enhance precision in the characterization of nonlinear media, and foresee potential applications with current technology.
arXiv Detail & Related papers (2021-09-16T15:40:36Z) - Superposition of two-mode squeezed states for quantum information
processing and quantum sensing [55.41644538483948]
We investigate superpositions of two-mode squeezed states (TMSSs)
TMSSs have potential applications to quantum information processing and quantum sensing.
arXiv Detail & Related papers (2021-02-01T18:09:01Z) - Quantum probes for universal gravity corrections [62.997667081978825]
We review the concept of minimum length and show how it induces a perturbative term appearing in the Hamiltonian of any quantum system.
We evaluate the Quantum Fisher Information in order to find the ultimate bounds to the precision of any estimation procedure.
Our results show that quantum probes are convenient resources, providing potential enhancement in precision.
arXiv Detail & Related papers (2020-02-13T19:35:07Z)
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.