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Scalable boson sampling with time-bin encoding using a loop-based architecture.
Motes KR, Gilchrist A, Dowling JP, Rohde PP. Motes KR, et al. Among authors: gilchrist a. Phys Rev Lett. 2014 Sep 19;113(12):120501. doi: 10.1103/PhysRevLett.113.120501. Epub 2014 Sep 18. Phys Rev Lett. 2014. PMID: 25279613
The architecture employs time-bin encoding, whereby the incident photons form a pulse train, which enters the loops. Dynamically controlled loop coupling ratios allow the construction of the arbitrary linear optics interferometers required for boson sampling. The architect …
The architecture employs time-bin encoding, whereby the incident photons form a pulse train, which enters the loops. Dynamically cont …
Practical scheme for quantum computation with any two-qubit entangling gate.
Bremner MJ, Dawson CM, Dodd JL, Gilchrist A, Harrow AW, Mortimer D, Nielsen MA, Osborne TJ. Bremner MJ, et al. Among authors: gilchrist a. Phys Rev Lett. 2002 Dec 9;89(24):247902. doi: 10.1103/PhysRevLett.89.247902. Epub 2002 Nov 25. Phys Rev Lett. 2002. PMID: 12484981
A proof of this result for systems of arbitrary finite dimension has been provided by Brylinski and Brylinski; however, their proof relies on a long argument using advanced mathematics. In contrast, our proof provides a simple constructive procedure which is
A proof of this result for systems of arbitrary finite dimension has been provided by Brylinski and Brylinski; however, their proof r
Measuring entangled qutrits and their use for quantum bit commitment.
Langford NK, Dalton RB, Harvey MD, O'Brien JL, Pryde GJ, Gilchrist A, Bartlett SD, White AG. Langford NK, et al. Among authors: gilchrist a. Phys Rev Lett. 2004 Jul 30;93(5):053601. doi: 10.1103/PhysRevLett.93.053601. Epub 2004 Jul 26. Phys Rev Lett. 2004. PMID: 15323694
With the novel use of a quantum state tomography method that only requires two-state superpositions, we achieve the most complete characterization of entangled qutrits to date. Ideally, entangled qutrits provide better security than qubits in quantum bit commitment: we mod …
With the novel use of a quantum state tomography method that only requires two-state superpositions, we achieve the most complete cha …
Quantum process tomography of a controlled-NOT gate.
O'Brien JL, Pryde GJ, Gilchrist A, James DF, Langford NK, Ralph TC, White AG. O'Brien JL, et al. Among authors: gilchrist a. Phys Rev Lett. 2004 Aug 20;93(8):080502. doi: 10.1103/PhysRevLett.93.080502. Epub 2004 Aug 20. Phys Rev Lett. 2004. PMID: 15447165
We demonstrate complete characterization of a two-qubit entangling process--a linear optics controlled-NOT gate operating with coincident detection--by quantum process tomography. We use a maximum-likelihood estimation to convert the experimental data into …
We demonstrate complete characterization of a two-qubit entangling process--a linear optics controlled-NOT gate operating with …
Loss-tolerant optical qubits.
Ralph TC, Hayes AJ, Gilchrist A. Ralph TC, et al. Among authors: gilchrist a. Phys Rev Lett. 2005 Sep 2;95(10):100501. doi: 10.1103/PhysRevLett.95.100501. Epub 2005 Aug 30. Phys Rev Lett. 2005. PMID: 16196913
We present a linear optics quantum computation scheme that employs a new encoding approach that incrementally adds qubits and is tolerant to photon loss errors. ...To illustrate our techniques we describe a quantum memory which is fault tolerant to photon los …
We present a linear optics quantum computation scheme that employs a new encoding approach that incrementally adds qubits and …
Demonstration of a simple entangling optical gate and its use in bell-state analysis.
Langford NK, Weinhold TJ, Prevedel R, Resch KJ, Gilchrist A, O'Brien JL, Pryde GJ, White AG. Langford NK, et al. Among authors: gilchrist a. Phys Rev Lett. 2005 Nov 18;95(21):210504. doi: 10.1103/PhysRevLett.95.210504. Epub 2005 Nov 18. Phys Rev Lett. 2005. PMID: 16384124
We demonstrate a new architecture for an optical entangling gate that is significantly simpler than previous realizations, using partially polarizing beam splitters so that only a single optical mode-matching condition is required. We demonstrate operation of a
We demonstrate a new architecture for an optical entangling gate that is significantly simpler than previous realizations, using part …
Time-reversal and super-resolving phase measurements.
Resch KJ, Pregnell KL, Prevedel R, Gilchrist A, Pryde GJ, O'Brien JL, White AG. Resch KJ, et al. Among authors: gilchrist a. Phys Rev Lett. 2007 Jun 1;98(22):223601. doi: 10.1103/PhysRevLett.98.223601. Epub 2007 May 31. Phys Rev Lett. 2007. PMID: 17677842
Our approach is robust, requiring only photons that exhibit classical interference: we experimentally demonstrate high-visibility phase super-resolution with three, four, and six photons using a standard laser and photon counters. ...
Our approach is robust, requiring only photons that exhibit classical interference: we experimentally demonstrate high-visibility phase supe …
Experimental demonstration of a compiled version of Shor's algorithm with quantum entanglement.
Lanyon BP, Weinhold TJ, Langford NK, Barbieri M, James DF, Gilchrist A, White AG. Lanyon BP, et al. Among authors: gilchrist a. Phys Rev Lett. 2007 Dec 21;99(25):250505. doi: 10.1103/PhysRevLett.99.250505. Epub 2007 Dec 19. Phys Rev Lett. 2007. PMID: 18233509
Shor's powerful quantum algorithm for factoring represents a major challenge in quantum computation. Here, we implement a compiled version in a photonic system. For the first time, we demonstrate the core processes, coherent control, and resultant entangled s …
Shor's powerful quantum algorithm for factoring represents a major challenge in quantum computation. Here, we implement a comp …
Manipulating biphotonic qutrits.
Lanyon BP, Weinhold TJ, Langford NK, O'Brien JL, Resch KJ, Gilchrist A, White AG. Lanyon BP, et al. Among authors: gilchrist a. Phys Rev Lett. 2008 Feb 15;100(6):060504. doi: 10.1103/PhysRevLett.100.060504. Epub 2008 Feb 14. Phys Rev Lett. 2008. PMID: 18352449
Quantum walks with encrypted data.
Rohde PP, Fitzsimons JF, Gilchrist A. Rohde PP, et al. Among authors: gilchrist a. Phys Rev Lett. 2012 Oct 12;109(15):150501. doi: 10.1103/PhysRevLett.109.150501. Epub 2012 Oct 9. Phys Rev Lett. 2012. PMID: 23102287
In the setting of networked computation, data security can be a significant concern. Here we consider the problem of allowing a server to remotely manipulate client supplied data, in such a way that both the information obtained by the client about the server …
In the setting of networked computation, data security can be a significant concern. Here we consider the problem of allowing a
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