# Quantum sensing close to a dissipative phase transition: Symmetry breaking and criticality as metrological resources

@article{FernandezLorenzo2017QuantumSC, title={Quantum sensing close to a dissipative phase transition: Symmetry breaking and criticality as metrological resources}, author={Samuel Fern'andez-Lorenzo and Diego Porras}, journal={Physical Review A}, year={2017}, volume={96}, pages={013817} }

We study the performance of a single qubit laser as a quantum sensor to measure the amplitude and phase of a driving field. By using parameter estimation theory we show that certain suitable field quadratures are optimal observables in the lasing phase. The quantum Fisher information scales linearly with the number of bosons and thus the precision can be enhanced by increasing the incoherent pumping acting on the qubit. If we restrict ourselves to measurements of the boson number observable…

## 33 Citations

### Critical Quantum Metrology with a Finite-Component Quantum Phase Transition.

- PhysicsPhysical review letters
- 2020

It is shown that, in spite of the critical slowing down, critical quantum optical probes can achieve a quantum-enhanced time scaling of the sensitivity in frequency-estimation protocols.

### Enhanced Parameter Estimation with Periodically Driven Quantum Probe

- PhysicsEntropy
- 2021

A quantum metrology protocol for measuring frequencies and weak forces based on a periodic modulating quantum Jahn–Teller system composed of a single spin and two bosonic modes is proposed, which allows it to perform parameter estimation with measurement time not limited by spin dephasing.

### Quantum Transducer Using a Parametric Driven-Dissipative Phase Transition.

- PhysicsPhysical review letters
- 2019

A sensitive quantum transducer is devised that translates the observed frequency of the parametric quantum phase transition to the detected single-photon amplitude signal and is shown to persist deep into the quantum limit of low photon numbers.

### Quantum thermometry with a dissipative quantum Rabi system

- PhysicsThe European Physical Journal Plus
- 2022

Dissipative quantum Rabi System, a finite-component system composed of a single two-level atom interacting with an optical cavity field mode, exhibits a quantum phase transition, which can be…

### Critical Quantum Metrology in the Non-Linear Quantum Rabi Model

- PhysicsEntropy
- 2022

The quantum Rabi model (QRM) with linear coupling between light mode and qubit exhibits the analog of a second-order phase transition for vanishing mode frequency which allows for…

### Exploiting symmetry and criticality in quantum sensing andquantum simulation

- Physics
- 2018

A suitable periodically driving fields acting on the Ising model is employed in order to tailor spin-spin interactions depending on the spatial direction of the bonds, and a Heisenberg scaling with the number of probes can be accomplished.

### Dynamic Framework for Criticality-Enhanced Quantum Sensing.

- PhysicsPhysical review letters
- 2021

A dynamic framework for quantum sensing with a family of Hamiltonians that undergo quantum phase transitions (QPTs) based on critical quantum dynamics is proposed and its divergent feature when approaching the critical point is demonstrated.

### A dissipative quantum simulator of lasing dynamics at the few quanta level

- Physics2022 IEEE International Conference on Quantum Computing and Engineering (QCE)
- 2022

We demonstrate a trapped-ion system with engineered competing dissipation channels, implemented independently on two ion species co-trapped in a Paul trap. We use control of the spin-oscillator…

### Quantum phase transition with dissipative frustration

- Physics
- 2018

We study the quantum phase transition of the one-dimensional phase model in the presence of dissipative frustration, provided by an interaction of the system with the environment through two…

### Emergent macroscopic bistability induced by a single superconducting qubit

- Physics
- 2022

The photon blockade breakdown in a continuously driven cavity QED system has been proposed as a prime example for a ﬁrst-order driven-dissipative quantum phase transition. But the predicted scaling…

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