@article{9832,
  author       = {{Kruse, Regina and Tiedau, Johannes and Bartley, Tim and Barkhofen, Sonja and Silberhorn, Christine}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  title        = {{{Limits of the time-multiplexed photon-counting method}}},
  doi          = {{10.1103/physreva.95.023815}},
  year         = {{2017}},
}

@article{9833,
  author       = {{Barkhofen, Sonja and Bartley, Tim and Sansoni, Linda and Kruse, Regina and Hamilton, Craig S. and Jex, Igor and Silberhorn, Christine}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Driven Boson Sampling}}},
  doi          = {{10.1103/physrevlett.118.020502}},
  year         = {{2017}},
}

@article{21032,
  abstract     = {{<jats:p>In the last few decades, there has been much progress on low loss waveguides, very efficient photon-number detectors and nonlinear processes. Engineered sum-frequency conversion is now at a stage where it allows operation on arbitrary temporal broadband modes, thus making the spectral degree of freedom accessible for information coding. Hereby the information is often encoded into the temporal modes of a single photon. Here, we analyse the prospect of using multi-photon states or squeezed states in different temporal modes based on integrated optics devices. We describe an analogy between mode-selective sum-frequency conversion and a network of spatial beam splitters. Furthermore, we analyse the limits on the achievable squeezing in waveguides with current technology and the loss limits in the conversion process.</jats:p>
          <jats:p>This article is part of the themed issue ‘Quantum technology for the 21st century’.</jats:p>}},
  author       = {{Harder, G. and Ansari, V. and Bartley, Tim and Brecht, Benjamin and Silberhorn, Christine}},
  issn         = {{1364-503X}},
  journal      = {{Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences}},
  number       = {{2099}},
  title        = {{{Harnessing temporal modes for multi-photon quantum information processing based on integrated optics}}},
  doi          = {{10.1098/rsta.2016.0244}},
  volume       = {{375}},
  year         = {{2017}},
}

@inproceedings{13903,
  author       = {{Höpker, Jan Philipp and Bartnick, Moritz and Meyer-Scott, Evan and Thiele, Frederik and Meier, Torsten and Bartley, Tim and Krapick, Stephan and Montaut, Nicola M. and Santandrea, Matteo and Herrmann, Harald and Lengeling, Sebastian and Ricken, Raimund and Quiring, Viktor and Lita, Adriana E. and Verma, Varun B. and Gerrits, Thomas and Nam, Sae Woo and Silberhorn, Christine}},
  booktitle    = {{Quantum Photonic Devices}},
  editor       = {{Agio, Mario and Srinivasan, Kartik and Soci, Cesare}},
  isbn         = {{9781510611733}},
  pages        = {{1035809}},
  publisher    = {{SPIE}},
  title        = {{{Towards integrated superconducting detectors on lithium niobate waveguides}}},
  doi          = {{10.1117/12.2273388}},
  volume       = {{10358}},
  year         = {{2017}},
}

@article{26323,
  author       = {{Sperling, Jan and Bartley, Tim and Donati, G. and Barbieri, M. and Jin, X.-M. and Datta, A. and Vogel, W. and Walmsley, I. A.}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Quantum Correlations from the Conditional Statistics of Incomplete Data}}},
  doi          = {{10.1103/physrevlett.117.083601}},
  year         = {{2016}},
}

@article{9835,
  author       = {{Sperling, J. and Bartley, Tim and Donati, G. and Barbieri, M. and Jin, X.-M. and Datta, A. and Vogel, W. and Walmsley, I. A.}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Quantum Correlations from the Conditional Statistics of Incomplete Data}}},
  doi          = {{10.1103/physrevlett.117.083601}},
  year         = {{2016}},
}

@article{9836,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Quantum mechanics establishes the ultimate limit to the scaling of the precision on any parameter, by identifying optimal probe states and measurements. While this paradigm is, at least in principle, adequate for the metrology of quantum channels involving the estimation of phase and loss parameters, we show that estimating the loss parameters associated with a quantum channel and a realistic quantum detector are fundamentally different. While Fock states are provably optimal for the former, we identify a crossover in the nature of the optimal probe state for estimating detector imperfections as a function of the loss parameter using Fisher information as a benchmark. We provide theoretical results for on-off and homodyne detectors, the most widely used detectors in quantum photonics technologies, when using Fock states and coherent states as probes.</jats:p>}},
  author       = {{Barbieri, Marco and Datta, Animesh and Bartley, Tim and Jin, Xian-Min and Kolthammer, W. Steven and Walmsley, Ian A.}},
  issn         = {{2299-114X}},
  journal      = {{Quantum Measurements and Quantum Metrology}},
  title        = {{{Quantum enhanced estimation of optical detector efficiencies}}},
  doi          = {{10.1515/qmetro-2016-0002}},
  year         = {{2016}},
}

@article{9268,
  author       = {{Harder, Georg and Bartley, Tim and Lita, Adriana E. and Nam, Sae Woo and Gerrits, Thomas and Silberhorn, Christine}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Single-Mode Parametric-Down-Conversion States with 50 Photons as a Source for Mesoscopic Quantum Optics}}},
  doi          = {{10.1103/physrevlett.116.143601}},
  year         = {{2016}},
}

@article{16104,
  author       = {{Bartley, Tim and Walmsley, Ian A}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Directly comparing entanglement-enhancing non-Gaussian operations}}},
  doi          = {{10.1088/1367-2630/17/2/023038}},
  year         = {{2015}},
}

@article{16105,
  author       = {{Donati, Gaia and Bartley, Tim and Jin, Xian-Min and Vidrighin, Mihai-Dorian and Datta, Animesh and Barbieri, Marco and Walmsley, Ian A.}},
  issn         = {{2041-1723}},
  journal      = {{Nature Communications}},
  title        = {{{Observing optical coherence across Fock layers with weak-field homodyne detectors}}},
  doi          = {{10.1038/ncomms6584}},
  year         = {{2014}},
}

@article{16106,
  author       = {{Bartley, Tim and Donati, Gaia and Jin, Xian-Min and Datta, Animesh and Barbieri, Marco and Walmsley, Ian A.}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Direct Observation of Sub-Binomial Light}}},
  doi          = {{10.1103/physrevlett.110.173602}},
  year         = {{2013}},
}

@article{16107,
  author       = {{Bartley, Tim and Crowley, Philip J. D. and Datta, Animesh and Nunn, Joshua and Zhang, Lijian and Walmsley, Ian}},
  issn         = {{1050-2947}},
  journal      = {{Physical Review A}},
  title        = {{{Strategies for enhancing quantum entanglement by local photon subtraction}}},
  doi          = {{10.1103/physreva.87.022313}},
  year         = {{2013}},
}

@article{16108,
  author       = {{Vidrighin, Mihai and Bartley, Tim and Donati, Gaia and Jin, Xian-Min and Barbieri, Marco and Kolthammer, W. Steven and Datta, Animesh and Walmsley, Ian A.}},
  issn         = {{2299-114X}},
  journal      = {{Quantum Measurements and Quantum Metrology}},
  title        = {{{Requirements for two-source entanglement concentration}}},
  doi          = {{10.2478/qmetro-2013-0002}},
  year         = {{2013}},
}

@article{16109,
  author       = {{Bartley, Tim and Donati, Gaia and Spring, Justin B. and Jin, Xian-Min and Barbieri, Marco and Datta, Animesh and Smith, Brian J. and Walmsley, Ian A.}},
  issn         = {{1050-2947}},
  journal      = {{Physical Review A}},
  title        = {{{Multiphoton state engineering by heralded interference between single photons and coherent states}}},
  doi          = {{10.1103/physreva.86.043820}},
  year         = {{2012}},
}

@article{16110,
  author       = {{Jotzu, Gregor and Bartley, Tim and Coldenstrodt-Ronge, Hendrik B. and Smith, Brian J. and Walmsley, Ian A.}},
  issn         = {{0950-0340}},
  journal      = {{Journal of Modern Optics}},
  pages        = {{42--45}},
  title        = {{{Continuous phase stabilization and active interferometer control using two modes}}},
  doi          = {{10.1080/09500340.2011.621033}},
  year         = {{2011}},
}

@article{16111,
  author       = {{Heim, B. and Elser, D. and Bartley, Tim and Sabuncu, M. and Wittmann, C. and Sych, D. and Marquardt, C. and Leuchs, G.}},
  issn         = {{0946-2171}},
  journal      = {{Applied Physics B}},
  pages        = {{635--640}},
  title        = {{{Atmospheric channel characteristics for quantum communication with continuous polarization variables}}},
  doi          = {{10.1007/s00340-009-3838-8}},
  year         = {{2009}},
}

@article{3094,
  abstract     = {{We demonstrate for the first time the feasibility of free space quantum key distribution with continuous variables under real atmospheric conditions. More specifically, we transmit coherent polarization states over a 100 m free space channel on the roof of our institute's building. In our scheme, signal and local oscillator (LO) are combined in a single spatial mode, which auto-compensates atmospheric fluctuations and results in an excellent interference. Furthermore, the LO acts as a spatial and spectral filter, thus allowing unrestrained daylight operation.}},
  author       = {{Elser, D. and Bartley, Tim and Heim, B. and Wittmann, Ch and Sych, D. and Leuchs, G.}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{4}},
  pages        = {{045014}},
  title        = {{{Feasibility of free space quantum key distribution with coherent polarization states}}},
  year         = {{2009}},
}