Roetteler
Martin Roetteler, Princeton, NJ US
Patent application number | Description | Published |
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20090241013 | EFFICIENT DECOUPLING SCHEMES FOR QUANTUM SYSTEMS USING SOFT PULSES - A system and method for dynamical decoupling of a quantum system includes forming a graph including elements to account for decoupling sequence effects represented as nodes in the graph and soft pulses applied being represented as edges in the graph. Sequences which visit edges and nodes in the graph are provided. Binary strings corresponding to the nodes in a coordinate system are mapped using a fixed linear error correcting code. A decoupling method is provided based upon a matrix formed using the error correcting code to determine features of the soft pulses to decouple environmental effects from the quantum system. | 09-24-2009 |
20090259905 | SYSTEM AND METHOD FOR QUANTUM COMPUTER CALIBRATION AND PERFORMANCE ESTIMATION - A system and method for characterizing noise in a quantum system includes determining pulse sequences for unitary twirling operations. Twirling processes are applied to a quantum system to calibrate errors and to determine channel parameters. Noise characteristics are determined from calibration data collected to calibrate the errors and to determine the channel parameters. The noise characteristics are characterized to determine if the noise is independent relaxation of qubits or collective relaxation of qubits. | 10-15-2009 |
20100094796 | QUANTUM STATE TOMOGRAPHY WITH YES/NO MEASUREMENTS - Apparatus and methods are disclosed for performing quantum state tomography from the statistics of a collection of measurements, each of which has only two possible outcomes and has the feature of being a measurement of a single qubit. By carefully choosing the measurements it becomes possible to infer the state of a quantum system from the statistics. Moreover, the function which computes the state from the measurement statistics can be computed efficiently in the dimension of the underlying system. It is also possible to explicitly construct such yes/no measurements for all dimensions in which a (+1/−1 valued) Hadamard matrix exists. | 04-15-2010 |
Martin Roetteler, East Windsor, NJ US
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20110182428 | SECURE COMMUNICATION OVER PASSIVE OPTICAL NETWORK (PON) WITH QUANTUM ENCRYPTION - Systems and methods to communicate securely includes communicating quantum encryption data on a first wavelength-division multiplexing passive optical network (WDM-PON); and communicating data over separate classical channels of a second WDM-PON, wherein the second WDM-PON synchronizes with the first WDM-PON while providing data communication over the classical channels. | 07-28-2011 |
20120091193 | SYSTEM AND METHOD FOR SYNTHETIC COMMODITY AND SYNTHETIC LEGAL TENDER CREATION - A quantum mechanical credit unit includes a plurality of qubit strings stored in computer readable storage media and configured for comparison with challenge questions during a verification procedure. The plurality of qubit strings is stored in at least k registers where k is a selected security number for the credit unit. An information register stores information about qubit strings that remain unused to provide the used qubit strings during the verification procedure. A unique serial number is configured to identify the credit unit without association with its holder or the qubit strings. Issuance and verification methods for the credit unit are also disclosed. | 04-19-2012 |
Martin Roetteler, Robbinsville, NJ US
Patent application number | Description | Published |
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20120210111 | QUANTUM REJECTION SAMPLING - Systems and methods for transforming an initial quantum state to a target quantum state are disclosed. The initial quantum state is denoted by superposed initial quantum sample states and the target quantum state is denoted by superposed target quantum sample states. The initial quantum state is initialized with a set of primary registers for the initial quantum state and with at least one ancillary register. The initial quantum state is transformed such that the set of primary registers reflects the initial quantum sample states and the at least one ancillary register is varied to compose an intermediate quantum state. In addition, the intermediate quantum state is amplified by implementing quantum state rotations in accordance with a plurality of reflections on the intermediate quantum state such that the reflections result in the target quantum sample states of the target quantum state with a discarding of the at least one ancillary register. | 08-16-2012 |