Imperial College London

Emeritus Professor SirPeterKnight

Faculty of Natural SciencesDepartment of Physics

Senior Research Investigator
 
 
 
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Contact

 

+44 (0)20 7594 7727p.knight Website

 
 
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Location

 

206Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

355 results found

Knight P, Walmsley I, 2019, UK national quantum technology programme, Quantum Science and Technology, Vol: 4, Pages: 1-9, ISSN: 2058-9565

The UK has, through a mix of government and industry funding, committed more than £1Bn over ten years to a coordinated programme in quantum technology. Five years into this programme, the UK National Quantum Technology Programme has induced a step change in the nation's capabilities for establishing a new sector in future quantum information technologies. We describe how the programme arose and the activities it has supported and influenced to deliver these new capabilities, building on a first phase of over £385M investment across several UK government agencies. As the programme enters its second phase, with a further substantial investment by UK government and global industries, we review the prospects for ensuring the advanced quantum science and demonstrator platforms in imaging, sensing, timing, communications and computing developed over the past five years drive the formation of the sector and embed quantum tech in a broad range of industries by means of new products and services.

Journal article

Xia K, Johnsson M, Knight PL, Twamley Jet al., 2016, Cavity-Free Scheme for Nondestructive Detection of a Single Optical Photon, Physical Review Letters, Vol: 116, ISSN: 1079-7114

Detecting a single photon without absorbing it is a long-standing challenge in quantum optics. All experiments demonstrating the nondestructive detection of a photon make use of a high quality cavity. We present a cavity-free scheme for nondestructive single-photon detection. By pumping a nonlinear medium we implement an interfield Rabi oscillation which leads to a ∼π phase shift on a weak probe coherent laser field in the presence of a single signal photon without destroying the signal photon. Our cavity-free scheme operates with a fast intrinsic time scale in comparison with similar cavity-based schemes. We implement a full real-space multimode numerical analysis of the interacting photonic modes and confirm the validity of our nondestructive scheme in the multimode case.

Journal article

Henkel J, Witting T, Fabris D, Lein M, Knight PL, Tisch JWG, Marangos JPet al., 2013, Prediction of attosecond light pulses in the VUV range in a high-order-harmonic-generation regime, PHYSICAL REVIEW A, Vol: 87, ISSN: 1050-2947

Journal article

Genoni MG, Paris MGA, Adesso G, Nha H, Knight PL, Kim MSet al., 2013, Optimal estimation of joint parameters in phase space, Physical Review A, Vol: 87, ISSN: 1094-1622

We address the joint estimation of the two defining parameters of a displacement operation in phase space. In a measurement scheme based on a Gaussian probe field and two homodyne detectors, it is shown that both conjugated parameters can be measured below the standard quantum limit when the probe field is entangled. We derive the most informative Cramér-Rao bound, providing the theoretical benchmark on the estimation, and observe that our scheme is nearly optimal for a wide parameter range characterizing the probe field. We discuss the role of the entanglement as well as the relation between our measurement strategy and the generalized uncertainty relations.

Journal article

Chipperfield LE, Robinson JS, Knight PL, Marangos JP, Tisch JWGet al., 2010, The generation and utilization of half-cycle cut-offs in high harmonic spectra, LASER & PHOTONICS REVIEWS, Vol: 4, Pages: 697-719, ISSN: 1863-8880

Journal article

Marzlin K-P, Sanders BC, Knight PL, 2008, Complementarity and uncertainty relations for matter-wave interferometry, PHYSICAL REVIEW A, Vol: 78, ISSN: 1050-2947

Journal article

JOO J, KNIGHT P, O'BRIEN J, Rudolph Tet al., 2007, One-way quantum computation with four-dimensional photonic qudits, Physical Review A, Vol: 76, ISSN: 1050-2947

We consider the possibility of performing linear optical quantum computations making use of extra photonic degrees of freedom. In particular, we focus on the case where we use photons as quadbits, four-dimensional photonic qudits. The basic 2-quadbit cluster state is a hyperentangled state across polarization and two spatial mode degrees of freedom. We examine the nondeterministic methods whereby such states can be created from single photons and/or Bell pairs and then give some mechanisms for performing higher-dimensional fusion gates.

Journal article

Fermani R, Scheel S, Knight PL, 2007, Trapping cold atoms near carbon nanotubes: Thermal spin flips and Casimir-Polder potential, PHYSICAL REVIEW A, Vol: 75, ISSN: 1050-2947

Journal article

Scheel S, Florescu M, Haffner H, Lee H, Strekalov DV, Knight PL, Dowling JPet al., 2007, Single photons on demand from tunable 3D photonic band-gap structures, JOURNAL OF MODERN OPTICS, Vol: 54, Pages: 409-416, ISSN: 0950-0340

Journal article

Haworth CA, Chipperfield LE, Robinson JS, Knight PL, Marangos JP, Tisch JWGet al., 2007, Half-cycle cutoffs in harmonic spectra and robust carrier-envelope phase retrieval, NATURE PHYSICS, Vol: 3, Pages: 52-57, ISSN: 1745-2473

Journal article

Joo J, Knight PL, Pachos JK, 2007, Single atom quantum walk with 1D optical superlattices, JOURNAL OF MODERN OPTICS, Vol: 54, Pages: 1627-1638, ISSN: 0950-0340

Journal article

Segal DM, Knight PL, Meschede D, 2007, Quantum information processing using selectively addressed atoms - Perface, JOURNAL OF MODERN OPTICS, Vol: 54, Pages: 1537-1540, ISSN: 0950-0340

Journal article

Joo J, Lim YL, Beige A, Knight PLet al., 2006, Single-qubit rotations in two-dimensional optical lattices with multiqubit addressing, PHYSICAL REVIEW A, Vol: 74, ISSN: 1050-2947

Journal article

Chipperfield LE, Knight PL, Tisch JWG, Marangos JPet al., 2006, Tracking individual electron trajectories in a high harmonic spectrum, OPTICS COMMUNICATIONS, Vol: 264, Pages: 494-501, ISSN: 0030-4018

Journal article

Florescu M, Scheel S, Lee H, Knight PL, Dowling JPet al., 2006, Nonlinear tuning of 3D photonic band-gap structures for single-photon on demand sources, 12th International Conference on Modulated Semiconductor Structures (MSS12), Publisher: ELSEVIER, Pages: 484-487, ISSN: 1386-9477

Conference paper

Fermani R, Scheel S, Knight PL, 2006, Spatial decoherence near metallic surfaces, PHYSICAL REVIEW A, Vol: 73, ISSN: 1050-2947

Journal article

Knight PL, Marangos JP, 2006, High Field Attosecond Physics, Obergurgl, 2005 - Preface, JOURNAL OF MODERN OPTICS, Vol: 53, Pages: 1-1, ISSN: 0950-0340

Journal article

Scheel S, Fermani R, Rekdal PK, Knight PL, Hinds EAet al., 2006, Atomic spin relaxation and spatial decoherence near metallic and superconducting surfaces, 12th Central European Workshop on Quantum Optics, Publisher: IOP PUBLISHING LTD, Pages: 188-+, ISSN: 1742-6588

Conference paper

Florescu M, Scheel S, Lee H, Knight PL, Bowling JPet al., 2006, Three-dimensional photonic band-gap structures for single-photon on demand sources, 8th International Conference on Transparent Optical Networks, Publisher: IEEE, Pages: 40-+

Conference paper

Scheel S, Pachos JK, Hinds EA, Knight PLet al., 2006, Quantum gates and decoherence, Quantum Coherence: from Quarks to Solids, Vol: 689, Pages: 47-81, ISSN: 0075-8450

Journal article

Scheel S, Pachos JK, Hinds EA, Knight PLet al., 2006, Quantum gates and decoherence, Publisher: Springer-Verlag Berlin, Pages: 47-81

Book chapter

Knight PL, Scheel S, 2006, Quantum information (In press), Springer handbook of atomic, molecular, and optical physics, Editors: Drake, Drake, Publisher: Springer, Pages: 1219-1234, ISBN: 9780387208022

Book chapter

Scheel S, Pachos JK, Hinds EA, Knight PLet al., 2006, Quantum gates and decoherence, Quantum Coherence: from Quarks to Solids, Vol: 689, Pages: 47-81, ISSN: 0075-8450

Journal article

Knight PL, 2005, The observation of matter wave fluctuations, SCIENCE, Vol: 310, Pages: 631-632, ISSN: 0036-8075

Journal article

Shore BW, Knight PL, 2005, Surprises in physics: Overturning conventional wisdom, LASER PHYSICS, Vol: 15, Pages: 1448-1457, ISSN: 1054-660X

Journal article

Scheel S, Rekdal PK, Knight PL, Hinds EAet al., 2005, Atomic spin decoherence near conducting and superconducting films, PHYSICAL REVIEW A, Vol: 72, ISSN: 1050-2947

Journal article

Daffer S, Knight PL, 2005, Generating optimal states for a homodyne Bell test, PHYSICAL REVIEW A, Vol: 72, ISSN: 1050-2947

Journal article

Paspalakis E, Terzis AF, Knight PL, 2005, Quantum interference induced sub-wavelength atomic localization, Conference on Lasers and Electro Optics/International Conference on Quantum Electronics (CLEO/IQEC 2004), Publisher: TAYLOR & FRANCIS LTD, Pages: 1685-1694, ISSN: 0950-0340

Conference paper

Carneiro I, Loo M, Xu XB, Girerd M, Kendon V, Knight PLet al., 2005, Entanglement in coined quantum walks on regular graphs, NEW JOURNAL OF PHYSICS, Vol: 7, ISSN: 1367-2630

Journal article

Beige A, Knight PL, Vitiello G, 2005, Cooling many particles to very low temperatures, 2nd International Workshop on Decoherence, Information, Complexity and Entropy, Publisher: SOCIEDADE BRASILEIRA FISICA, Pages: 403-410, ISSN: 0103-9733

Conference paper

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