121 citations · 523 across the 25 of their papers we have counts for
26 papers
Super-Exponential Advantage of Squeezed Light in Phase Estimation under Discrete Phase Randomisation
Lorcan O. Conlon, V Vijendran, Aritra Das +7
A paradigmatic task in quantum metrology is that of phase estimation. For this task it is commonly believed, under reasonable assumptions about prior information, that a quadratic…
Precision Limits of Multiparameter Markovian-Noise Metrology
Anthony J. Brady, Yu-Xin Wang, Luis Pedro García-Pintos +1
Measuring stochastic signals ("noise metrology") constitutes a central task in quantum sensing and the characterization of open quantum systems. Here we establish ultimate precisio…
Entanglement advantage in sensing power-law spatiotemporal noise correlations
Yu-Xin Wang, Anthony J. Brady, Federico Belliardo +1
Noise sensing underlies many physical applications including tests of non-classicality, thermometry, verification of correlated phases of quantum matter, and characterization of cr…
Physical-Layer Machine Learning with Multimode Interferometric Photon Counting
Jia-Jin Feng, Anthony J. Brady, Quntao Zhuang
The learning of the physical world relies on sensing and data post-processing. When the signals are weak, multidimensional and correlated, the performance of learning is often bott…
Correlated Noise Estimation with Quantum Sensor Networks
Anthony J. Brady, Yu-Xin Wang, Victor V. Albert +2
We address the metrological problem of estimating collective stochastic properties imprinted on a network of quantum sensors. Canonical examples include center-of-mass quadrature f…
Exponential entanglement advantage in sensing correlated noise
Yu-Xin Wang, Jacob Bringewatt, Alireza Seif +3
Correlated noise naturally arises in quantum systems due to, e.g., phase and amplitude fluctuations in global control or long-range correlations generated by a many-body sensing ta…
Quantum-enhanced dark matter detection with in-cavity control: mitigating the Rayleigh curse
Haowei Shi, Anthony J. Brady, Wojciech Górecki +3
The nature of dark matter is a fundamental puzzle in modern physics. A major approach of searching for dark matter relies on detecting feeble noise in microwave cavities. However,…
Safeguarding Oscillators and Qudits with Distributed Two-Mode Squeezing
Anthony J. Brady, Jing Wu, Quntao Zhuang
Recent advancements in multi-mode Gottesman-Kitaev-Preskill (GKP) codes have shown great promise in enhancing the protection of both discrete and analog quantum information. This b…
Entanglement from superradiance and rotating quantum fluids of light
Adrià Delhom, Killian Guerrero, Paula Calizaya +5
The amplification of radiation by superradiance is a universal phenomenon observed in numerous physical systems. We demonstrate that superradiant scattering generates entanglement…
Advances in Bosonic Quantum Error Correction with Gottesman-Kitaev-Preskill Codes: Theory, Engineering and Applications
Anthony J. Brady, Alec Eickbusch, Shraddha Singh +2
Encoding quantum information into a set of harmonic oscillators is considered a hardware efficient approach to mitigate noise for reliable quantum information processing. Various c…
Entanglement from rotating black holes in thermal baths
Ivan Agullo, Anthony J. Brady, Adrià Delhom +1
We extend previous efforts to quantify the entanglement generated in Hawking's evaporation process by including rotation and thermal environments (e.g. the cosmic microwave backgro…
A numerical study of measurement-induced phase transitions in the Sachdev-Ye-Kitaev model
Stav Haldar, Anthony J. Brady
Continuous monitoring of an otherwise closed quantum system has been found to lead to a measurement-induced phase transition (MIPT) characterized by abrupt changes in the entanglem…
Optimal encoding of oscillators into more oscillators
Jing Wu, Anthony J. Brady, Quntao Zhuang
Bosonic encoding of quantum information into harmonic oscillators is a hardware efficient approach to battle noise. In this regard, oscillator-to-oscillator codes not only provide…
Robustness of entanglement in Hawking radiation for optical systems immersed in thermal baths
Ivan Agullo, Anthony J. Brady, Dimitrios Kranas
Entanglement is the quantum signature of Hawking's particle pair-creation from causal horizons, for gravitational and analog systems alike. Ambient thermal fluctuations, ubiquitous…
Entanglement-Enhanced Optomechanical Sensing
Yi Xia, Aman R. Agrawal, Christian M. Pluchar +5
Optomechanical systems have been exploited in ultrasensitive measurements of force, acceleration, and magnetic fields. The fundamental limits for optomechanical sensing have been e…
Entanglement-enhanced optomechanical sensor array for dark matter searches
Anthony J. Brady, Xin Chen, Kewen Xiao +8
The nature of dark matter is one of the most important open questions in modern physics. The search for dark matter is challenging since, besides gravitational interaction, it feeb…
Global Time Distribution via Satellite-Based Sources of Entangled Photons
Stav Haldar, Ivan Agullo, Anthony J. Brady +3
We propose a satellite-based scheme to perform clock synchronization between ground stations spread across the globe using quantum resources. We refer to this as a quantum clock sy…
Symplectic circuits, entanglement, and stimulated Hawking radiation in analog gravity
Anthony J. Brady, Ivan Agullo, Dimitrios Kranas
We introduce a convenient set of analytical tools (the Gaussian formalism) and diagrams (symplectic circuits) to analyze multi-mode scattering events in analog gravity, such as pai…
Event horizons are tunable factories of quantum entanglement
Ivan Agullo, Anthony J. Brady, Dimitrios Kranas
That event horizons generate quantum correlations via the Hawking effect is well known. We argue, however, that the creation of entanglement can be modulated as desired, by appropr…
Searches for New Particles, Dark Matter, and Gravitational Waves with SRF Cavities
Asher Berlin, Sergey Belomestnykh, Diego Blas +33
This is a Snowmass white paper on the utility of existing and future superconducting cavities to probe fundamental physics. Superconducting radio frequency (SRF) cavity technology…
Entangled sensor-networks for dark-matter searches
Anthony J. Brady, Christina Gao, Roni Harnik +3
The hypothetical axion particle (of unknown mass) is a leading candidate for dark matter (DM). Many experiments search for axions with microwave cavities, where an axion may conver…
Enhancing distributed sensing with imperfect error correction
Boyu Zhou, Anthony J. Brady, Quntao Zhuang
Entanglement has shown promise in enhancing information processing tasks in a sensor network, via distributed quantum sensing protocols. As noise is ubiquitous in sensor networks,…
Stimulating the Quantum Aspects of an Optical Analog White-Black Hole
Ivan Agullo, Anthony J. Brady, Dimitrios Kranas
This work introduces a synergistic combination of analytical methods and numerical simulations to study the propagation of weak wave-packet modes in an optical medium containing th…
Relativistic frame-dragging and the Hong-Ou-Mandel dip a primitive to gravitational effects in multi-photon quantum-interference
Anthony J. Brady, Stav Haldar
We investigate the Hong-Ou-Mandel (HOM) effect a two-photon quantum-interference effect in the space-time of a rotating spherical mass. In particular, we analyze a common-p…