Demonstration of entanglement-enhanced phase estimation in solid

@article{Liu2015DemonstrationOE,
  title={Demonstration of entanglement-enhanced phase estimation in solid},
  author={Gang-Qin Liu and Yu-Ran Zhang and Yan-Chun Chang and Jie-Dong Yue and Heng Fan and Xin-Yu Pan},
  journal={Nature Communications},
  year={2015},
  volume={6}
}
Precise parameter estimation plays a central role in science and technology. The statistical error in estimation can be decreased by repeating measurement, leading to that the resultant uncertainty of the estimated parameter is proportional to the square root of the number of repetitions in accordance with the central limit theorem. Quantum parameter estimation, an emerging field of quantum technology, aims to use quantum resources to yield higher statistical precision than classical approaches… 
View on PubMed
nature.com
22 Citations
Highly Influential Citations
1
Background Citations
4
Methods Citations
3

22 Citations

Citation Type

Citation Type

Reply to ‘Enhancing a phase measurement by sequentially probing a solid-state system'
TLDR
It is clarified that the entanglement between the two non-identical qubits is the crucial and decisive factor in the achieved enhancement of phase sensitivity, and the experimental technique used to encode the phases to qubits does not affect this conclusion.
Quantum metrology with spin cat states under dissipation
TLDR
This scheme provides a realizable way to achieve high-precision measurements via dissipative quantum systems of Bose atoms via spin cat states (a kind of non-Gaussian entangled states in superposition of two quasi-orthogonal spin coherent states) under dissipation.
Quantum thermometry in a squeezed thermal bath
We address the dephasing dynamics of the quantum Fisher information (QFI) for the process of quantum thermometry with probes coupled to squeezed thermal baths via the nondemolition interaction. We…
Beating the standard quantum limit under ambient conditions with solid-state spins
TLDR
A sub-SQL interferometer at ambient conditions by using a multispin system, namely, the nitrogen-vacancy (NV) defect in diamond, and the deterministic and joint initialization of NV negative state, NV electron spin, and two nuclear spins is realized at room temperature.
Parameter estimation in plasmonic QED
Proposal to test quantum wave-particle superposition on massive mechanical resonators
We present and analyze a proposal for a macroscopic quantum delayed-choice experiment with massive mechanical resonators. In our approach, the electronic spin of a single nitrogen-vacancy impurity is…
Phononic-waveguide-assisted steady-state entanglement of silicon-vacancy centers
Multiparticle entanglement is of great significance for quantum metrology and quantum information processing. We here present an efficient scheme to generate stable multiparticle entanglement in a…
Thermal entanglement between π-electrons in silicene and photons; occurrence of phase transitions
Enhancing a phase measurement by sequentially probing a solid-state system
TLDR
It is argued here that this claim to perform the first room temperature entanglement-enhanced phase measurement in a solid-state system is incorrect: their measurement is not enhanced because of the entanglements in their system, instead the enhancement comes from the fact that the phase shift is applied twice to their state.
Achieving the Heisenberg limit under general Markovian noise using quantum error correction without ancilla
TLDR
If the authors employ qubits for parameter sensing, it can be shown that one can restore Heisenberg limit via full and fast control without any ancilla, as long as the signal Hamiltonian of the probe system has nonvanishing component perpendicular to the noise.
...
1
2
3
...

References

SHOWING 1-10 OF 69 REFERENCES
Entanglement-free Heisenberg-limited phase estimation
TLDR
This work generalizes Kitaev’s phase estimation algorithm using adaptive measurement theory to achieve a standard deviation scaling at the Heisenberg limit, representing a drastic reduction in the complexity of achieving quantum-enhanced measurement precision.
Quantum error correction in a solid-state hybrid spin register
TLDR
It is demonstrated that joint initialization, projective readout and fast local and non-local gate operations can all be achieved in diamond spin systems, even under ambient conditions, paving the way to large-scale quantum computation.
Room-Temperature Quantum Cloning Machine with Full Coherent Phase Control in Nanodiamond
TLDR
This work reports the first room-temperature implementation of quantum phase cloning with a controllable phase in a solid-state system: the nitrogen-vacancy centre of a nanodiamond.
Experimental demonstration of entanglement-enhanced rotation angle estimation using trapped ions.
TLDR
Three methods are experimentally investigated, utilizing different atomic observables and entangled states, to increase the sensitivity of rotation angle measurements beyond the "standard quantum limit" for nonentangled states including all sources of noise.
Precise qubit control beyond the rotating wave approximation
Fast and accurate quantum operations of a single spin in room-temperature solids are required in many modern scientific areas, for instance in quantum information, quantum metrology, and…
High-fidelity projective read-out of a solid-state spin quantum register
TLDR
The preparation and measurement of a multi-spin quantum register in a low-temperature solid-state system is demonstrated by implementing resonant optical excitation techniques originally developed in atomic physics, and compatibility with qubit control is shown.
Solid-state optimal phase-covariant quantum cloning machine
Here, we report an experimental realization of optimal phase-covariant quantum cloning machine with a single electron spin in solid state system at room temperature. The involved three states of two…
Advances in quantum metrology
The statistical error in any estimation can be reduced by repeating the measurement and averaging the results. The central limit theorem implies that the reduction is proportional to the square root…
Many-particle entanglement with Bose–Einstein condensates
TLDR
This work proposes a method to achieve substantial entanglement of a large number of atoms in a Bose–Einstein condensate, which is then allowed to evolve freely and should be realizable with present technology.
Single-Shot Readout of a Single Nuclear Spin
TLDR
Single-shot, projective measurement of a single nuclear spin in diamond is demonstrated using a quantum nondemolition measurement scheme, which allows real-time observation of an individual nuclear spin’s state in a room-temperature solid.
...
1
2
3
4
5
...