ORCID Profile
0000-0003-1204-6009
Current Organisations
Freie Universität Berlin
,
University of Oxford
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Publications
Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution
Publisher: The Optical Society
Date: 10-06-2016
Security of continuous-variable quantum cryptography with Gaussian postselection
Publisher: American Physical Society (APS)
Date: 21-02-2013
Rate limits in quantum networks with lossy repeaters
Publisher: American Physical Society (APS)
Date: 31-05-2022
Observation of Genuine One-Way Einstein-Podolsky-Rosen Steering
Publisher: American Physical Society (APS)
Date: 21-04-2016
Models of reduced-noise, probabilistic linear amplifiers
Publisher: American Physical Society (APS)
Date: 05-05-2016
Measurement-based noiseless linear amplification for quantum communication
Publisher: Springer Science and Business Media LLC
Date: 16-03-2014
Anonymous conference key agreement in linear quantum networks
Publisher: Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften
Date: 21-09-2023
Quantum certification and benchmarking
Publisher: Springer Science and Business Media LLC
Date: 17-06-2020
Finite-size effects in continuous-variable quantum key distribution with Gaussian postselection
Publisher: American Physical Society (APS)
Date: 22-05-2020
Composable finite-size effects in free-space continuous-variable quantum-key-distribution systems
Publisher: American Physical Society (APS)
Date: 20-01-2021
Quantum key distribution without sending a quantum signal
Publisher: IOP Publishing
Date: 08-06-2015
Nondeterministic noiseless amplification via non-symplectic phase space transformations
Publisher: IOP Publishing
Date: 05-07-2013
Quantum communication with an accelerated partner
Publisher: American Physical Society (APS)
Date: 24-01-2013
Quantum simulation of thermodynamics in an integrated quantum photonic processor
Publisher: Springer Science and Business Media LLC
Date: 07-2023
DOI: 10.1038/S41467-023-38413-9
Abstract: One of the core questions of quantum physics is how to reconcile the unitary evolution of quantum states, which is information-preserving and time-reversible, with evolution following the second law of thermodynamics, which, in general, is neither. The resolution to this paradox is to recognize that global unitary evolution of a multi-partite quantum state causes the state of local subsystems to evolve towards maximum-entropy states. In this work, we experimentally demonstrate this effect in linear quantum optics by simultaneously showing the convergence of local quantum states to a generalized Gibbs ensemble constituting a maximum-entropy state under precisely controlled conditions, while introducing an efficient certification method to demonstrate that the state retains global purity. Our quantum states are manipulated by a programmable integrated quantum photonic processor, which simulates arbitrary non-interacting Hamiltonians, demonstrating the universality of this phenomenon. Our results show the potential of photonic devices for quantum simulations involving non-Gaussian states.
Certified Quantum Random Numbers from Untrusted Light
Publisher: American Physical Society (APS)
Date: 09-12-2020
Stationary optomechanical entanglement between a mechanical oscillator and its measurement apparatus
Publisher: American Physical Society (APS)
Date: 12-08-2020
Continuous Variable Quantum Communication
Publisher: University of Queensland Library
Sharing Classical Secrets with Continuous-Variable Entanglement: Composable Security and Network Coding Advantage
Publisher: American Physical Society (APS)
Date: 22-11-2021
Channel purification via continuous-variable quantum teleportation with Gaussian postselection
Publisher: American Physical Society (APS)
Date: 15-01-2016
Related Organisations
University Of Oxford
Location: United Kingdom of Great Britain and Northern Ireland
Related Funding Activities
No related grants have been discovered for Nathan Walk.