470 citations · 3.5k across the 39 of their papers we have counts for
39 papers
Genuine certifiable randomness from a black-box
Liam P. McGuinness
Randomness is intrinsic to quantum mechanics; the outcome of a measurement on a quantum state is a random variable. This feature has been applied to randomness certification, where…
The Quantum Cramér-Rao lower bound (Why quantum computers won't work I)
Liam P. McGuinness
Quantum information science currently poses a troubling contradiction. It can be summarized as: (1) To factor efficiently, quantum computers must perform exponentially precise ener…
Quantum squeezing cannot beat the standard quantum limit
Liam P. McGuinness
Quantum entanglement between particles is expected to allow one to perform tasks that would otherwise be impossible. In quantum sensing and metrology, entanglement is often claimed…
Matters Arising: Distributed quantum sensing with mode-entangled spin-squeezed atomic states
Liam P. McGuinness
In ``Distributed quantum sensing with mode-entangled spin-squeezed atomic states" Nature (2022), Malia et. al. claim to improve the precision of a network of clocks by using entang…
Matters Arising: Entanglement-enhanced matter-wave interferometry in a high-finesse cavity
Liam P. McGuinness
In their paper "Entanglement-enhanced matter-wave interferometry in a high-finesse cavity" Nature (2022), Greve et. al. claim to use entanglement in a matter-wave interferometer to…
Matters Arising: Time-reversal-based quantum metrology with many-body entangled states
Liam P. McGuinness
In their paper "Time-reversal-based quantum metrology with many-body entangled states" Nature Physics (2022), Colombo et. al. claim to measure both an unknown phase and an oscillat…
The case against entanglement improved measurement precision
Liam P. McGuinness
It is widely accepted that quantum entanglement between otherwise independent sensors can yield a measurement precision beyond that achievable when the same resources are employed…
Frequency measurements beyond the Heisenberg time-energy limit with a single atom
Liam P. McGuinness
The Heisenberg time-energy relation prevents determination of an atomic transition to better than the inverse of the measurement time. The relation generally applies to frequency e…
Phase sensitive quantum spectroscopy with high frequency resolution
Nicolas Staudenmaier, Simon Schmitt, Liam P. McGuinness +1
Classical sensors for spectrum analysis are widely used but lack micro- or nanoscale spatial resolution. On the other hand, quantum sensors, capable of working with nanoscale preci…
Nanoscale vector electric field imaging using a single electron spin
M. S. J Barson, L. M. Oberg, L. P. McGuinness +4
The ability to perform nanoscale electric field imaging of elementary charges at ambient temperatures will have diverse interdisciplinary applications. While the nitrogen-vacancy (…
Randomisation of Pulse Phases for Unambiguous and Robust Quantum Sensing
Zhen-Yu Wang, Jacob E. Lang, Simon Schmitt +6
We develop theoretically and demonstrate experimentally a universal dynamical decoupling method for robust quantum sensing with unambiguous signal identification. Our method uses r…
NV center based nano-NMR enhanced by deep learning
Nati Aharon, Amit Rotem, Liam P. McGuinness +3
The growing field of nano nuclear magnetic resonance (nano-NMR) seeks to estimate spectra or discriminate between spectra of minuscule amounts of complex molecules. While this fiel…
Magnetic-field-learning using a single electronic spin in diamond with one-photon-readout at room temperature
Raffaele Santagati, Antonio A. Gentile, Sebastian Knauer +11
Nitrogen-vacancy (NV) centres in diamond are appealing nano-scale quantum sensors for temperature, strain, electric fields and, most notably, for magnetic fields. However, the cryo…
Quantum measurement of a rapidly rotating spin qubit in diamond
Alexander A. Wood, Emmanuel Lilette, Yaakov Y. Fein +5
A controlled qubit in a rotating frame opens new opportunities to probe fundamental quantum physics, such as geometric phases in physically rotating frames, and can potentially enh…
Unambiguous nuclear spin detection using engineered quantum sensing sequence
Zijun Shu, Zhendong Zhang, Qingyun Cao +9
Sensing, localising and identifying individual nuclear spins or frequency components of a signal in the presence of a noisy environments requires the development of robust and sele…
Protecting quantum spin coherence of nanodiamonds in living cells
Q. -Y. Cao, P. -C. Yang, M. -S. Gong +9
Due to its superior coherent and optical properties at room temperature, the nitrogen-vacancy (N-V ) center in diamond has become a promising quantum probe for nanoscale quantum se…
Towards hyperpolarization of oil molecules via nitrogen-vacancy centers in diamond
P. Fernández-Acebal, O. Rosolio, J. Scheuer +10
Efficient polarization of organic molecules is of extraordinary relevance when performing nuclear magnetic resonance (NMR) and imaging. Commercially available routes to dynamical n…
Blueprint for nanoscale NMR
Ilai Schwartz, Joachim Rosskopf, Simon Schmitt +5
Nitrogen vacancy (NV) centers in diamond have been used as ultrasensitive magnetometers to perform nuclear magnetic resonance (NMR) spectroscopy of statistically polarized samples…
Sub-millihertz magnetic spectroscopy with a nanoscale quantum sensor
Simon Schmitt, Tuvia Gefen, Felix M. Stürner +13
Precise timekeeping is critical to metrology, forming the basis by which standards of time, length and fundamental constants are determined. Stable clocks are particularly valuable…
Quantum spectroscopy of single spins assisted by a classical clock
Tuvia Gefen, Maxim Khodas, Liam P. McGuinness +2
Quantum spectroscopy with single two level systems has considerably improved our ability to detect weak signals. Recently it was realized that for classical signals, precision and…
Nanomechanical sensing using spins in diamond
Michael S. J. Barson, Phani Peddibhotla, Preeti Ovartchaiyapong +15
Nanomechanical sensors and quantum nanosensors are two rapidly developing technologies that have diverse interdisciplinary applications in biological and chemical analysis and micr…
Stimulated emission from NV centres in diamond
Jan Jeske, Desmond W. M. Lau, Liam P. McGuinness +8
Stimulated emission is the process fundamental to laser operation, thereby producing coherent photon output. Despite negatively-charged nitrogen-vacancy (NV) centres being disc…
Quantum metrology enhanced by repetitive quantum error correction
Thomas Unden, Priya Balasubramanian, Daniel Louzon +11
The accumulation of quantum phase in response to a signal is the central mechanism of quantum sensing, as such, loss of phase information presents a fundamental limitation. For thi…
Towards chemical structure resolution with nanoscale nuclear magnetic resonance spectroscopy
Xi Kong, Alexander Stark, Jiangfeng Du +2
Nuclear magnetic resonance (NMR) spectroscopy has approached the limit of single molecule sensitivity, however the spectral resolution is currently insufficient to obtain detailed…