154 citations · 623 across the 20 of their papers we have counts for
20 papers
Intensity correlation holography for remote phase sensing and 3D imaging
Guillaume Thekkadath, Duncan England, Benjamin Sussman
Holography is an established technique for measuring the wavefront of optical signals through interferometric combination with a reference wave. Conventionally the integration time…
Measuring the quadrature coherence scale on a cloud quantum computer
Aaron Z. Goldberg, Guillaume S. Thekkadath, Khabat Heshami
Coherence underlies quantum phenomena, yet it is manifest in classical theories; delineating coherence's role is a fickle business. The quadrature coherence scale (QCS) was invente…
Intensity interferometry for holography with quantum and classical light
G. S. Thekkadath, D. England, F. Bouchard +3
As first demonstrated by Hanbury Brown and Twiss, it is possible to observe interference between independent light sources by measuring correlations in their intensities rather tha…
Experimental demonstration of Gaussian boson sampling with displacement
G. S. Thekkadath, S. Sempere-Llagostera, B. A. Bell +3
Gaussian boson sampling (GBS) is quantum sampling task in which one has to draw samples from the photon-number distribution of a large-dimensional nonclassical squeezed state of li…
Measuring the joint spectral mode of photon pairs using intensity interferometry
G. S. Thekkadath, B. A. Bell, R. B. Patel +2
The ability to manipulate and measure the time-frequency structure of quantum light is useful for information processing and metrology. Measuring this structure is also important w…
Single-shot discrimination of coherent states beyond the standard quantum limit
G. S. Thekkadath, S. Sempere-Llagostera, B. A. Bell +3
The discrimination of coherent states is a key task in optical communication and quantum key distribution protocols. In this work, we use a photon-number-resolving detector, the tr…
Quantum-enhanced interferometry with large heralded photon-number states
G. S. Thekkadath, M. E. Mycroft, B. A. Bell +11
Quantum phenomena such as entanglement can improve fundamental limits on the sensitivity of a measurement probe. In optical interferometry, a probe consisting of entangled phot…
Testing multi-photon interference on a silicon chip
Bryn A. Bell, Guillaume S. Thekkadath, Renyou Ge +2
Multi-photon interference in large multi-port interferometers is key to linear optical quantum computing and in particular to boson sampling. Silicon photonics enables complex inte…
Engineering Schrödinger cat states with a photonic even-parity detector
G. S. Thekkadath, B. A. Bell, I. A. Walmsley +1
When two equal photon-number states are combined on a balanced beam splitter, both output ports of the beam splitter contain only even numbers of photons. Consider the time-reversa…
Tuning between photon-number and quadrature measurements with weak-field homodyne detection
G. S. Thekkadath, D. S. Phillips, J. F. F. Bulmer +10
Variable measurement operators enable the optimization of strategies for testing quantum properties and the preparation of a range of quantum states. Here, we experimentally implem…
Detector-Agnostic Phase-Space Distributions
J. Sperling, D. S. Phillips, J. F. F. Bulmer +11
The representation of quantum states via phase-space functions constitutes an intuitive technique to characterize light. However, the reconstruction of such distributions is challe…
Determining complementary properties using weak-measurement: uncertainty, predictability, and disturbance
G. S. Thekkadath, F. Hufnagel, J. S. Lundeen
It is often said that measuring a system's position must disturb the complementary property, momentum, by some minimum amount due to the Heisenberg uncertainty principle. Using a "…
Projecting onto any two-photon polarization state using linear optics
G. S. Thekkadath, L. Giner, X. Ma +2
Projectors are a simple but powerful tool for manipulating and probing quantum systems. For instance, projecting two-qubit systems onto maximally entangled states can enable quantu…
An experimental investigation of measurement-induced disturbance and time symmetry in quantum physics
Davor Curic, Magdalena C. Richardson, Guillaume S. Thekkadath +3
Unlike regular time evolution governed by the Schrödinger equation, standard quantum measurement appears to violate time-reversal symmetry. Measurement creates random disturbances…
High-speed noise-free optical quantum memory
K. T. Kaczmarek, P. M. Ledingham, B. Brecht +9
Quantum networks promise to revolutionise computing, simulation, and communication. Light is the ideal information carrier for quantum networks, as its properties are not degraded…
Determining complementary properties with quantum clones
G. S. Thekkadath, R. Y. Saaltink, L. Giner +1
In a classical world, simultaneous measurements of complementary properties (e.g. position and momentum) give a system's state. In quantum mechanics, measurement-induced disturbanc…
Direct measurement of the density matrix of a quantum system
G. S. Thekkadath, L. Giner, Y. Chalich +3
One drawback of conventional quantum state tomography is that it does not readily provide access to single density matrix elements, since it requires a global reconstruction. Here…
Optical quantum memory for ultrafast photons using molecular alignment
G. S. Thekkadath, K. Heshami, D. G. England +3
The absorption of broadband photons in atomic ensembles requires either an effective broadening of the atomic transition linewidth, or an off-resonance Raman interaction. Here we p…
Spin correlations and entanglement in partially magnetised ensembles of fermions
Guillaume S. Thekkadath, Liang Jiang, Joseph H. Thywissen
We show that the singlet fraction and total magnetisation (or polarisation) can bound the minimum concurrence in an ensemble of spins. We identify as a…
Comment on "Human Time-Frequency Acuity Beats the Fourier Uncertainty Principle"
G. S. Thekkadath, Michael Spanner
In the initial article [Phys. Rev. Lett. 110, 044301 (2013), arXiv:1208.4611] it was claimed that human hearing can beat the Fourier uncertainty principle. In this Comment, we demo…