Abstract: In some embodiments, a vertical cavity optical parametric oscillator may be provided. The vertical cavity optical parametric oscillator may include a first mirror layer and a second mirror layer and a non-linear optical layer between the first mirror layer and the second mirror layer. The non-linear optical layer may be configured to resonate both a fundamental harmonic optical signal and a second harmonic optical signal. Each of the first mirror layer and the second mirror layer may provide reflecting surfaces for both the fundamental harmonic optical signal and the second harmonic optical signal to reflect back and forth within the non-linear optical layer.

Abstract: Embodiments disclosed herein are directed computing systems for solving Boolean satisfiability (SAT). In some embodiments, the computing systems may be all-optical computing systems. Operations within the computing systems may be based on an optical encoding of a Boolean SAT problem, particularly for performing matrix-vector or vector-vector multiplication in an optical domain. An optical random access memory may include a plurality to individually addressable optical cavities, each cavity storing a corresponding variable as resonating optical pulses. The optical domain computations may be performed by offset circuits that provide an offset to variables loaded from the optical random access memory, multiply and accumulate circuits that generate products of the offset variables, and feedback circuits that feed back the products to the optical random access memory.

Abstract: A coherent Ising machine may include a process cavity configured to maintain a system state in a low photon regime. The coherent Ising machine may further include a controller configured to estimate the system state based on a previous iteration, measure the system state, determine a quantum noise in the process cavity based on comparing the estimated system state and the measured system state, calculate a feedback based on the estimated system state and the quantum noise, and provide the feedback to the process cavity for a next iteration.

Abstract: Methods and systems are presented for using optical parametric amplifiers in various ways that enhance a native quadratic coupling strength so that a photonic component of interest can be measured or otherwise observed without demolishing the component of interest at a system output. For example such components may include a number of signal Bogoliubov excitations, a pump modular quadrature, or a signal quadrature squared.

Abstract: Systems and methods for confining an optical signal in a non-linear optical quantum computing system are disclosed. An optical signal and a trap field are provided in the non-linear optical quantum computing system. The trap field propagates with and confines the optical signal in time and/or space. The non-linear optical quantum computing system may be structured as a ring, a single-pass waveguide or a segmented single-pass waveguide. In some cases, multiple optical signals may be input into the system and evaluated in a multiplexed fashion.

Abstract: A system and method for efficient sampling of ground-state and low-energy Ising configurations. The system may be implemented using the nonlinear stochastic dynamics of a measurement-feedback-based coherent Ising machine (MFB-CIM). A discrete-time Gaussian-state model of the MFB-CIM may capture the nonlinear dynamics. The system and method requires many fewer roundtrips to sample than for other known systems.

Abstract: A recommendation system associated with an online marketplace can generate recommendations pertaining to users and assets of the online marketplace by computing user-asset propensity scores. The recommendation system can compute a corresponding user-asset propensity score for each unique user-asset combination. Based on the scores, recommendations indicating predicted user behavior can be generated. To generate the user-asset propensity scores, the recommendation system can generate machine-learned models based on training data. The model can comprise a plurality of classifiers each being associated with user-asset attributes.

Abstract: A reduced keyboard system (100), with a reduced number of keys (13, 15, 23, 25, 102, 104, 106, 108, 110, 112), but retaining the typing map of the conventional QWERTY or QWERTY-type keyboard by employing an intuitive and learning database engine. A plurality of letters, numerals, symbols and functions are assigned to a set of data keys, buttons or data inputs (multi-character keys). The arrangement of the multi-character keys together with the character assignments to the individual multi-character keys allows a user to use the same typing map, as when typing on a conventional QWERTY or QWERTY-type keyboard, be it visual mapping (i.e. physical location of keys) or finger mapping (i.e. touch typing for typist). This enhances the typing experience on the reduced keyboard system to have the same feeling, typing rhythm and speed as typing on a conventional QWERTY or QWERTY-type keyboard.

Abstract: A method for entering text efficiently by providing letter or word choices. The method includes letter choices to aid inputting accented, diacritic or special characters and a more efficient method to suggest word completion choices including words with accented, diacritic or special characters. This method can be used to enhance any existing text input systems, even reduced keyboard systems. The method also includes a more efficient method to select and input the letter or word choices. This allows for hybrid keyboard systems where physical keys are used in concert with a screen input system to input the letter or word choice.

Abstract: A method for entering text unambiguously. The method includes detecting, on a screen, sensor pad, or reduced keyboard system, a stroke across of an individual character or symbol; and displaying the character or symbol unambiguously. This allows for unambiguous inputting in reduced keyboard systems without the need of changing modes or auxiliary keys.

Abstract: A reduced keyboard system (100), with a reduced number of keys (13, 15, 23, 25, 102, 104, 106, 108, 110, 112), but retaining the typing map of the conventional QWERTY or QWERTY-type keyboard by employing an intuitive and learning database engine. A plurality of letters, numerals, symbols and functions are assigned to a set of data keys, buttons or data inputs (multi-character keys). The arrangement of the multi-character keys together with the character assignments to the individual multi-character keys allows a user to use the same typing map, as when typing on a conventional QWERTY or QWERTY-type keyboard, be it visual mapping (i.e. physical location of keys) or finger mapping (i.e. touch typing for typist). This enhances the typing experience on the reduced keyboard system to have the same feeling, typing rhythm and speed as typing on a conventional QWERTY or QWERTY-type keyboard.