Dr Syed Assad

Department	Quantum Science & Technology
Research group	Quantum optics group
Office phone	(02) 612 57994
Email
Office	Physics North Link 1 24

arXiv pre-prints

Spyros Tserkis, Syed M. Assad, Ping Koy Lam, Prineha Narang
Quantifying total correlations in quantum systems through the Pearson correlation coefficient
arXiv:2306.14458v3

Conlon L, Shajilal B, Walsh A, Zhao J, Janousek J, Assad S, Lam P
Verifying the security of a continuous variable quantum communication protocol via quantum metrology
NPJ Quantum Information 10 (2024)
arXiv:2311.05389v2

Lorcan O. Conlon, Jun Suzuki, Ping Koy Lam, Syed M. Assad
Role of the extended Hilbert space in the attainability of the Quantum Cram\'er-Rao bound for multiparameter estimation
arXiv:2404.01520v1

Vijendran V, Das A, Koh D, Assad S, Lam P
An Expressive Ansatz for Low-Depth Quantum Approximate Optimisation
Quantum Science and Technology 9 (2024)
arXiv:2302.04479v2

Conlon L, Eilenberger F, Lam P, Assad S
Discriminating mixed qubit states with collective measurements
Communications Physics 6 (2023)
arXiv:2302.08882v2

Li B, Conlon L, Lam P, Assad S
Optimal Single Qubit Tomography: Realization of Locally Optimal Measurements on a Quantum Computer
Physical Review A 108 (2023)
arXiv:2302.05140v2

Lorcan O. Conlon, Angus Walsh, Yuhan Hua, Oliver Thearle, Tobias Vogl, Falk Eilenberger, Ping Koy Lam, Syed M. Assad
Testing the postulates of quantum mechanics with coherent states of light and homodyne detection
arXiv:2308.03446v1

Conlon L, Lam P, Assad S
Multiparameter estimation with two qubit probes in noisy channels
Entropy 25 (2023) 40
arXiv:2307.13936v1

Li B, Das A, Tserkis S, Narang P, Lam P, Assad S
On the equivalence between squeezing and entanglement potential for two-mode Gaussian states
Scientific Reports 13 (2023)
arXiv:2307.10386v1

Conlon L, Vogl T, Marciniak C, Pogorelov I, Yung S, Eilenberger F, Berry D, Santana F, Blatt R, Monz T, Lam P, Assad S
Approaching optimal entangling collective measurements on quantum computing platforms
Nature Physics 19 (2023) 351-357
arXiv:2205.15358v2

Lorcán O. Conlon, Jun Suzuki, Ping Koy Lam, Syed M. Assad
The gap persistence theorem for quantum multiparameter estimation
arXiv:2208.07386v2

Conlon L, Michel T, Guccione G, McKenzie K, Assad S, Lam P
Enhancing the precision limits of interferometric satellite geodesy missions
npj Microgravity 8 (2022)
arXiv:2109.07666v2

Chrzanowski H, Assad S, Bernu J, Hage B, Lund A, Ralph T, Lam P, Symul T
Reconstruction of photon number conditioned states using phase randomized homodyne measurements
Journal of Physics B: Atomic, Molecular and Optical Physics 46 (2013) 104009 (10)
arXiv:2107.12118v2

Conlon L, Suzuki J, Lam P, Assad S
Efficient computation of the Nagaoka--Hayashi bound for multi-parameter estimation with separable measurements
NPJ Quantum Information 7 (2021)
arXiv:2008.02612v2

Bradshaw M, Conlon L, Tserkis S, Gu M, Lam P, Assad S
Optimal probes for continuous variable quantum illumination
Physical Review A 103 (2021)
arXiv:2010.09156v2

Narasimhachar V, Assad S, Binder F, Thompson J, Yadin B, Gu M
Thermodynamic resources in continuous-variable quantum systems
NPJ Quantum Information 7 (2021)
arXiv:1909.07364v2

Tserkis S, Thompson J, Lund A, Lam P, Ralph T, Gu M, Assad S
Maximum entanglement of formation for a two-mode Gaussian state over passive operations
Physical Review A 102 (2020)
arXiv:2004.13948v4

Assad S, Gu M, Li X, Lam P
Decoupling Cross-Quadrature Correlations using Passive Operations
Physical Review A 102 (2020) 1-4
arXiv:2004.03105v2

Assad S, Li J, Liu Y, Zhao N, Zhao W, Lam P, Qu Z, Li X
Accessible precisions for estimating two conjugate parameters using Gaussian probes
Physical Review Research 2 (2020)
arXiv:2003.07095v2

Truong N, Haw J, Assad S, Lam P, Kavehei O
Machine Learning Cryptanalysis of a Quantum Random Number Generator
IEEE Transactions on Information Forensics and Security 14 (2019) 403-414
arXiv:1905.02342v2

Michel T, Haw J, Marangoni D, Thearle O, Vallone G, Villoresi P, Lam P, Assad S
Real-Time Source Independent Quantum Random Number Generator with Squeezed States
Physical Review Applied 12 (2019)
arXiv:1903.01071v1

Bradshaw M, Lam P, Assad S
Gaussian multipartite quantum discord from classical mutual information
Journal of Physics B: Atomic, Molecular and Optical Physics 52 (2019) 1-10
arXiv:1811.08066v1

Bradshaw M, Assad S, Haw J, Tan S, Lam P, Gu M
Overarching framework between Gaussian quantum discord and Gaussian quantum illumination
Physical Review A: Atomic, Molecular and Optical Physics 95 (2017) 1-10pp
arXiv:1611.10020v2

Assad S, Bradshaw M, Lam P
Phase Estimation of Coherent States with a Noiseless Linear Amplifier
International Journal of Quantum Information 15 (2017) 1-10pp.
arXiv:1608.01777v2

Assad S, Thearle O, Lam P
Maximizing device-independent randomness from a Bell experiment by optimizing the measurement settings
Physical Review A: Atomic, Molecular and Optical Physics 94 (2016) 1-6
arXiv:1607.00471v1

Thearle O, Assad S, Symul T
Estimation of Output Channel Noise for Continuous Variable Quantum Key Distribution
Physical Review A - Atomic, Molecular, and Optical Physics 93 (2016) 1-6pp
arXiv:1508.04859v2

Haw J, Assad S, Lance A, Ng N, Sharma V, Lam P, Symul T
Maximization of Extractable Randomness in a Quantum Random-Number Generator
Physical Review Applied 3 (2015) 1-12pp
arXiv:1411.4512v2

Symul T, Assad S, Lam P
Real time demonstration of high bitrate quantum random number generation with coherent laser light
Applied Physics Letters 98 (2011) 3
arXiv:1107.4438v1

Publications

Journal article

Tanggara A, Nair R, Assad S, Narasimhachar V, Tserkis S, Thompson J, Lam P, Gu M
Quantum-optimal information encoding using noisy passive linear optics
Quantum 8, 1218(2024)

Vijendran V, Das A, Koh D, Assad S, Lam P
An expressive ansatz for low-depth quantum approximate optimisation
Quantum Science and Technology 9, 2(2024)

Conlon L, Eilenberger F, Lam P, Assad S
Discriminating mixed qubit states with collective measurements
Communications Physics 6, 337(2023)

Conlon L, Lam P, Assad S
Multiparameter Estimation with Two-Qubit Probes in Noisy Channels
Entropy 25, 8(2023) 40

Erkilic O, Conlon L, Shajilal B, Kish S, Tserkis S, Kim Y, Lam P, Assad S
Surpassing the repeaterless bound with a photon-number encoded measurement-device-independent quantum key distribution protocol
NPJ Quantum Information 9(2023)

Li B, Conlon L, Lam P, Assad S
Optimal single-qubit tomography: Realization of locally optimal measurements on a quantum computer
Physical Review A 108(2023)

Li B, Das A, Tserkis S, Narang P, Lam P, Assad S
On the equivalence between squeezing and entanglement potential for two-mode Gaussian states
Scientific Reports 13, 1(2023)

Shajilal B, Huntington E, Lam P, Assad S
A new entropic quantum correlation measure for adversarial systems
Scientific Reports 13(2023) 1-11

Zhao J, Jeng H, Conlon L, Tserkis S, Shajilal B, Liu K, Ralph T, Assad S, Lam P
Enhancing quantum teleportation efficacy with noiseless linear amplification
Nature Communications 14, 1(2023) 1-8

Conlon L, Michel T, Guccione G, McKenzie K, Assad S, Lam P
Enhancing the precision limits of interferometric satellite geodesy missions
npj Microgravity 8, 1(2022)

Shajilal B, Thearle O, Tranter A, Lu Y, Huntington E, Assad S, Lam P, Janousek J
12.6 dB squeezed light at 1550 nm from a bow-tie cavity for long-term high duty cycle operation
Optics Express 30, 21(2022) 37213-37223

Zhang H, Wan L, Haug T, Mok W, Paesani S, Shi Y, Cai H, Chin L, Muhammad Faeyz Karim M, Xiao L, Assad S
Resource-efficient high-dimensional subspace teleportation with a quantum autoencoder
Science Advances 8, 40(2022) eabn9783

Bradshaw M, Conlon L, Tserkis S, Gu M, Lam P, Assad S
Optimal probes for continuous-variable quantum illumination
Physical Review A 103, 6(2021)

Conlon L, Suzuki J, Lam P, Assad S
Efficient computation of the Nagaoka-Hayashi bound for multi-parameter estimation with separable measurements
NPJ Quantum Information 7, 1(2021)

Narasimhachar V, Assad S, Binder F, Thompson J, Yadin B, Gu M
Thermodynamic resources in continuous-variable quantum systems
NPJ Quantum Information 7, 9(2021)

Assad S, Gu M, Li X, Lam P
Decoupling cross-quadrature correlations using passive operations
Physical Review A 102, Online(2020) 1-4

Assad S, Li J, Liu Y, Zhao N, Zhao W, Lam P, Qu Z, Li X
Accessible precisions for estimating two conjugate parameters using Gaussian probes
Physical Review Research 2, 2(2020)

Tserkis S, Thompson J, Lund A, Lam P, Ralph T, Gu M, Assad S
Maximum entanglement of formation for a two-mode Gaussian state over passive operations
Physical Review A 102, 5(2020)

Zhao J, Liu K, Jeng H, Gu M, Thompson J, Lam P, Assad S
A high-fidelity heralded quantum squeezing gate
Nature Photonics (2020)

Bradshaw M, Lam P, Assad S
Gaussian multipartite quantum discord from classical mutual information
Journal of Physics B: Atomic, Molecular and Optical Physics 52, 24(2019) 1-10

Jeng H, Tserkis S, Haw J, Chrzanowski H, Janousek J, Ralph T, Assad S, Lam P
Entanglement properties of a measurement-based entanglement distillation experiment
Physical Review A 99, 4(2019) 042304: 1-11

Michel T, Haw J, Marangoni D, Thearle O, Vallone G, Villoresi P, Lam P, Assad S
Real-Time Source-Independent Quantum Random-Number Generator with Squeezed States
Physical Review Applied 12, 3(2019)

Truong N, Haw J, Assad S, Lam P, Kavehei O
Machine Learning Cryptanalysis of a Quantum Random Number Generator
IEEE Transactions on Information Forensics and Security 14, 2(2019) 403-414

Zhang G, Haw J, Cai H, Xu F, Assad S, Fitzsimons J, Zhou X, Zhang Y, Yu S, Wu J, Ser W, Kwek L
An integrated silicon photonic chip platform for continuous-variable quantum key distribution
Nature Photonics 13, 12(2019) 839-842

Bradshaw M, Lam P, Assad S
Ultimate precision of joint quadrature parameter estimation with a Gaussian probe
Physical Review A: Atomic, Molecular and Optical Physics 97, 1(2018) 11

Li J, Liu Y, Cui L, Huo N, Assad S, Li X, Ou Z
Joint measurement of multiple noncommuting parameters
Physical Review A 97, 5(2018) 1-11

Liu Y, Li J, Cui L, Huo N, Assad S, Li X, Ou Z
Loss-tolerant quantum dense metrology with SU(1,1) interferometer
Optics Express 26, 21(2018) 27705-27715

Thearle O, Janousek J, Armstrong S, Hosseini S, Schünemann M, Assad S, Symul T, James M, Huntington E, Ralph T, Lam P
Violation of Bell's Inequality Using Continuous Variable Measurements
Physical Review Letters 120, 4(2018) 1-5

Assad S, Bradshaw M, Lam P
Phase estimation of coherent states with a noiseless linear amplifier
International Journal of Quantum Information 15, 1(2017) 1-10.

Bradshaw M, Assad S, Lam P
A tight Cram?r?Rao bound for joint parameter estimation with a pure two-mode squeezed probe
Physics Letters A 381, 32(2017) 2598-2607

Zhao J, Dias J, Haw J, Symul T, Bradshaw M, Blandino R, Ralph T, Assad S, Lam P
Quantum enhancement of signal-to-noise ratio with a heralded linear amplifier
Optica 4, 11(2017) 1421-1428

Zhao J, Haw J, Symul T, Lam P, Assad S
Characterization of a measurement-based noiseless linear amplifier and its applications
Physical Review A - Atomic, Molecular, and Optical Physics 96, 1(2017) 012319, 1-12

Haw J, Zhao J, Dias J, Assad S, Bradshaw M, Blandino R, Symul T, Ralph T, Lam P
Surpassing the no-cloning limit with a heralded hybrid linear amplifier for coherent states
Nature Communications 7(2016) 13222-13222

Thearle O, Assad S, Symul T
Estimation of output-channel noise for continuous-variable quantum key distribution
Physical Review A - Atomic, Molecular, and Optical Physics 93, 4(2016) 1-6

Walk N, Hosseini S, Geng J, Thearle O, Haw J, Armstrong S, Assad S, Janousek J, Ralph T, Symul T, Wiseman H, Lam P
Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution
Optica 3, 6(2016) 634-642

Haw J, Assad S, Lance A, Ng N, Sharma V, Lam P, Symul T
Maximization of extractable randomness in a quantum random-number generator
Physical Review Applied 3, 5(2015) 1-12

Shen Y, Assad S, Grosse N, Li X, Reid M, Lam P
Nonlinear Entanglement and its Application to Generating Cat States
Physical Review Letters 114, 10(2015) 1-5

Yuan X, Assad S, Thompson J, Haw J, Vedral V, Ralph T, Lam P, Weedbrook C, Gu M
Replicating the benefits of Deutschian closed timelike curves without breaking causality
NPJ Quantum Information 1(2015) 15007 5

Assad S, Kalev A
Encoding secret information in measurement settings
International Journal of Quantum Information 12, 3(2014)

Chrzanowski H, Walk N, Assad S, Janousek J, Hosseini S, Ralph T, Symul T, Lam P
Measurement-based noiseless linear amplification for quantum communication
Nature Photonics 8, 4(2014) 333-338

Geng J, Campbell G, Bernu J, Higginbottom D, Sparkes B, Assad S, Zhang W, Robins N, Lam P, Buchler B
Electromagnetically induced transparency and four-wave mixing in a cold atomic ensemble with large optical depth
New Journal of Physics 16(2014) 113053/1-11

Hosseini S, Rahimi-Keshari S, Haw J, Assad S, Chrzanowski H, Janousek J, Symul T, Ralph T, Lam P
Experimental verification of quantum discord in continuous-variable states
Journal of Physics B: Atomic, Molecular and Optical Physics 47, 2(2014) 1-8

Gu M, Chrzanowski H, Assad S, Symul T, Modi K, Ralph T, Vedral V, Lam P
Observing the operational significance of discord consumption
Nature Physics 8, 9(2012) 671-675

Symul T, Assad S, Lam P
Real time demonstration of high bitrate quantum random number generation with coherent laser light
Applied Physics Letters 98, 23(2011) 3

Grosse N, Mehmet M, Assad S, Schnabel R, Symul T, Lam P
Observation of Entanglement between Two Light Beams Spanning an Octave in Optical Frequency
Physical Review Letters 100, 243601 (2008)(2008) 4

Symul T, Alton D, Assad S, Lance A, Weedbrook C, Ralph T, Lam P
Experimental demonstration of post-selection-based continuous-variable quantum key distribution in the presence of Gaussian noise
Physical Review A: Atomic, Molecular and Optical Physics 76(2007) 030303/1-4

Assad S
Dynamical features of deoxyribonucleic acid and configuration transition in the transcription process
Journal of Physics: Condensed Matter 18, 39(2006) 9007-9030

Assad S
Statistical equilibrium distributions of baroclinic vortices in a rotating two-layer model at low Froude numbers
Geophysical and Astrophysical Fluid Dynamics 100, 6(2006) 503-524

Assad S
Raw-data attacks in Quantum cryptography with partial tomography
International Journal of Quantum Information 4, 6(2006) 1003-1012

Assad S
Statistical equilibrium of the coulomb/vortex gas on the unbounded 2-dimensional plane
Discrete and Continuous Dynamical Systems - Series B 5, 1(2005) 1-14

Assad S
Self containment radius for rotating planar flows, single-signed vortex gas and electron plasma
Regular and Chaotic Dynamics 10, 3(2005) 239-255

Assad S
Monte-Carlo and polyhedron-based simulations I: Extremal states of the logarithmic n-body problem on a sphere
Discrete and Continuous Dynamical Systems - Series B 3, 3(2003) 313-342

Assad S
A Monte Carlo algorithm for free and coaxial ring extremal states of the vortex N -body problem on a sphere
Physica A: Statistical mechanics and its applications 328, 1-2(2003) 53-96

(59 publications)

Conference paper

Sayat M, Kish S, Assad S, Quinlivan C, Thearle O, Lam P, Rattenbury N, Cater J
LEO-to-Ground Gaussian Modulated Continuous Variable Quantum Key Distribution
International Astronautical Congress (IAC) 73rd ?, ?(2022)

Haw J, Truong N, Hong Jie Ng H, Ho R, Assad S, Wang C, Lam P, Kavehei O
Benchmarking a Quantum Random Number Generator with Machine Learning
Quantum Information and Measurement 2021 ?, ?(2021)

Michel T, Haw J, Marangon D, Thearle O, Vallone G, Villoresi P, Lam P, Assad S
Real-Time Self-Testing Quantum Random Number Generator with Non-classical States
European Conference on Optical Communication (ECOC) ?, ?(2020) 1-4

Liu Y, Li J, Li X, Ou Z, Assad S
Quantum metrology in the joint measurement of multiple parameters encoded in non-commuting observables with SU(1,1) interferometer
Frontiers in Optics, FiO 2017 ?, ?(2017) 1-2

Chrzanowski H, Gu M, Assad S, Symul T, Modi K, Ralph T, Vedral V, Lam P
Discord as a quantum resource for bi-partite communication
11th International Conference on Quantum Communication, Measurement and Computation, QCMC 2012 ?, ?(2014) 116-118

Chrzanowski H, Walk N, Haw J, Thearle O, Assad S, Janousek J, Hosseini S, Ralph T, Symul T, Lam P
Measurement-based noiseless linear amplification for quantum communication
Quantum and Nonlinear Optics III ?, ?(2014)

Hosseini S, Rahimi-Keshari S, Haw J, Assad S, Chrzanowski H, Janousek J, Symul T, Lam P, Ralph T, Gu M, Modi K, Vedral V
Experimental verification of quantum discord in continuousvariable states and operational significance of discord consumption
OSA CLEO: QELS_Fundamental Science, CLEO_QELS 2014 ?, ?(2014) 2

Gu M, Chrzanowski H, Assad S, Symul T, Modi K, Ralph T, Vedral V, Lam P
Discord as a Consumable Resource
10th Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2013 ?, ?(2013) 1-4

Janousek J, Chrzanowski H, Hosseini S, Assad S, Symul T, Walk N, Ralph T, Lam P
Virtual Noiseless Amplification
Conference on Lasers and Electro-Optics-Int Quantum Electronics Conference CLEO_Europe_IQEC 2013 ?, ?(2013) 1

Lam P, Hosseini M, Campbell G, Pinel O, Sparkes B, Twamley J, Rebic S, Chrzanowski H, Assad S, Bernu J, Ralph T, Walk N, Symul T, Buchler B
Building a quantum repeater with quantum memories and noiseless amplifiers
10th Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2013 ?, ?(2013)

Symul T, Assad S, Lam P
Fast real-time random numbers from vacuum fluctuations
Conference on Lasers and Electro-Optics-Int Quantum Electronics Conference CLEO_Europe_IQEC 2013 ?, ?(2013) 1

Assad S, Chrzanowski H, Symul T, Lam P, Ralph T, Gu M, Vedral V
A functional interpretation of continuous variable quantum discord
2011 International Quantum Electronics Conference, IQEC 2011 and Conference on Lasers and Electro-Optics, CLEO Pacific Rim 2011 ?, ?(2011) 1200-1202

(12 publications)

Conference written presentation

Symul T, Chrzanowski H, Assad S, Lam P, Ralph T, Gu M, Modi K, Vedrai V
Operational significance of discord consumption
Conference on Lasers and Electro-Optics-Int Quantum Electronics Conference CLEO_Europe_IQEC 2013 ?, ?(2013) 1

(1 publications)