Abstract: Trading tools may be manipulated by allowing assembly, disassembly, and configuration of different trading tools. The assembly of different trading tools may generate combined trading tools. The combined trading tools may enable interoperability between the trading tools therein. Customization of the combined trading tools may be enabled by enabling a user to rearrange predefined areas displayed within the trading tools within the combined trading tools. The customization of the combined trading tools may enable customization of different functionality within the combined trading tools. The trading tools within a combined trading tool may include a tab tool for enabling multiple instances of another trading tool to which the tab tool is attached. Each instance of a trading tool may be associated with a respective tab for enabling a user to toggle between the multiple instances of the trading tool.

Abstract: An optical device for a quantum random number generator comprising: a source of phase randomised pulses of light, the source of phase randomised pulses of light further comprising a plurality of gain-switched lasers, each gain-switched laser having an output, and each gain-switched laser being configured to emit a stream of pulses such that the phase of each pulse in the stream of pulses is randomised, and an optical pulse combiner, the optical pulse combiner being configured to receive streams of pulses from the output of each gain-switched laser, combine the streams of pulses with one another into a combined stream of pulses and direct the combined stream of pulses into at least one output of the optical pulse combiner, the at least one output of the optical pulse combiner being the output of the source of phase randomised pulses of light; wherein the source of phase randomised pulses of light is configured such that the streams of pulses of light emitted by the plurality of gain-switched lasers are tem

Abstract: Trading tools may be manipulated by allowing assembly, disassembly, and configuration of different trading tools. The assembly of different trading tools may generate combined trading tools. The combined trading tools may enable interoperability between the trading tools therein. Customization of the combined trading tools may be enabled by enabling a user to rearrange predefined areas displayed within the trading tools within the combined trading tools. The customization of the combined trading tools may enable customization of different functionality within the combined trading tools. The trading tools within a combined trading tool may include a tab tool for enabling multiple instances of another trading tool to which the tab tool is attached. Each instance of a trading tool may be associated with a respective tab for enabling a user to toggle between the multiple instances of the trading tool.

Abstract: Trading tools may be manipulated by allowing assembly, disassembly, and configuration of different trading tools. The assembly of different trading tools may generate combined trading tools. The combined trading tools may enable interoperability between the trading tools therein. Customization of the combined trading tools may be enabled by enabling a user to rearrange predefined areas displayed within the trading tools within the combined trading tools. The customization of the combined trading tools may enable customization of different functionality within the combined trading tools. The trading tools within a combined trading tool may include a tab tool for enabling multiple instances of another trading tool to which the tab tool is attached. Each instance of a trading tool may be associated with a respective tab for enabling a user to toggle between the multiple instances of the trading tool.

Abstract: A transmitter for a quantum communication system, comprising: a photon source unit comprising a photon source; a first intensity modulator, configured to receive an input light pulse from the photon source unit, the first intensity modulator comprising: a first element, configured to split the input light pulse into two components; a phase modulator, configured to apply a phase shift between the two components; and a second element, configured to interfere the two components; wherein at least one of the first element and the second element is asymmetric.

Abstract: Trading tools may be manipulated by allowing assembly, disassembly, and configuration of different trading tools. The assembly of different trading tools may generate combined trading tools. The combined trading tools may enable interoperability between the trading tools therein. Customization of the combined trading tools may be enabled by enabling a user to rearrange predefined areas displayed within the trading tools within the combined trading tools. The customization of the combined trading tools may enable customization of different functionality within the combined trading tools. The trading tools within a combined trading tool may include a tab tool for enabling multiple instances of another trading tool to which the tab tool is attached. Each instance of a trading tool may be associated with a respective tab for enabling a user to toggle between the multiple instances of the trading tool.

Abstract: An optical device for a quantum random number generator comprising: a source of phase randomised pulses of light, the source of phase randomised pulses of light further comprising a plurality of gain-switched lasers, each gain-switched laser having an output, and each gain-switched laser being configured to emit a stream of pulses such that the phase of each pulse in the stream of pulses is randomised, and an optical pulse combiner, the optical pulse combiner being configured to receive streams of pulses from the output of each gain-switched laser, combine the streams of pulses with one another into a combined stream of pulses and direct the combined stream of pulses into at least one output of the optical pulse combiner, the at least one output of the optical pulse combiner being the output of the source of phase randomised pulses of light; wherein the source of phase randomised pulses of light is configured such that the streams of pulses of light emitted by the plurality of gain-switched lasers are tem

Abstract: A transmitter for a quantum communication system, comprising: a photon source unit comprising a photon source; a first intensity modulator, configured to receive an input light pulse from the photon source unit, the first intensity modulator comprising: a first element, configured to split the input light pulse into two components; a phase modulator, configured to apply a phase shift between the two components; and a second element, configured to interfere the two components; wherein at least one of the first element and the second element is asymmetric.

Abstract: Trading tools may be manipulated by allowing assembly, disassembly, and configuration of different trading tools. The assembly of different trading tools may generate combined trading tools. The combined trading tools may enable interoperability between the trading tools therein. Customization of the combined trading tools may be enabled by enabling a user to rearrange predefined areas displayed within the trading tools within the combined trading tools. The customization of the combined trading tools may enable customization of different functionality within the combined trading tools. The trading tools within a combined trading tool may include a tab tool for enabling multiple instances of another trading tool to which the tab tool is attached. Each instance of a trading tool may be associated with a respective tab for enabling a user to toggle between the multiple instances of the trading tool.

Abstract: An example method includes receiving market data related to a plurality of tradeable objects offered at an electronic exchange displaying the received market data in an option chain display. A first portion of the option chain display displays the plurality of tradeable objects and a second portion displays underlying contracts corresponding to each of the plurality of tradeable objects displayed in the first portion. The example method includes triggering, automatically in response to receiving an input selection generated at a client device in one of the first portion or the second portion of the display, selective displaying of the plurality of tradeable objects and the underlying contracts in the first portion and the second portion.

Abstract: A detection system for monitoring the intensity of a stream of modulated pulses, the system comprising a controller configured to provide a control signal to a component outputting modulated pulses the control signal controlling the level of modulation for each pulse exiting the component and a detector configured to measure the intensity of the pulses in the stream of pulses exiting the component outputting modulated pulses, wherein the detector comprises a gated detector, the controller being configured to send a gating signal to said detector, wherein said gating signal varies the gain of the detector with the control signal, such that pulses with a selected modulation level can be detected.

Abstract: A measuring unit for determining information from an input signal, the unit comprising a decoder configured to perform a measurement on said input signal using two operators, a first operator configured to distinguish between two orthogonal states of said input signal and a second operator selected from an inverting operator configured to invert the result of the measurement by the first operator and a null operator configured to have a null effect on the result of the measurement by the first operator.

Abstract: A quantum communication system comprising a sending unit and a receiving unit, said sending unit comprising a photon source assembly configured to output a stream of pulses of light having at least two different intensities and a memory configured to store information for determining which pulses should be reference pulses and which pulses should be data pulses, the average intensity of reference pulses being different to the average intensity of data pulses, the receiving unit comprising a memory for storing information for identifying the position of reference pulses within the stream of pulses and a processor for determining the calibration of the quantum communication system from the reference pulses.

Abstract: A photon source comprising a photon source body, said photon source body comprising at least one quantum dot; carrier injection means for injecting carriers into said at least one quantum dot and change of state means for changing the state of the carriers within the quantum dot after a predetermined time duration, the carrier injection means injecting carriers which are configured to allow emission of radiation by radiative recombination

Abstract: An optical device comprising: a first active stack of layers comprising an optical cavity, at least one quantum dot located in said cavity, an upper contact provided above said optical cavity; a lower contact provided below said cavity, wherein an abrupt material interface defines the whole lateral boundary of said cavity and said cavity is patterned such that it provides two dimensional lateral confinement of photon modes, said upper an lower contacts being arranged such that current can flow vertically across the cavity between the two contacts.

Abstract: A semiconductor device comprising a vertical stack of layers, comprising: an active layer configured to support a two dimensional carrier gas having an excess of carriers; source and drain contacts provided to said active layer such that a current can flow between said source and drain contacts through said two dimensional carrier gas; a lower conducting region, wherein said lower contact conducting region is a patterned lower conducting region such that said active layer is suspended across gaps in said lower conducting region and said active layer is physically supported by and suspended between parts of said lower conducting region.

Abstract: A photon source comprising a quantum dot layer having a plurality of quantum dots with an n-modal distribution in emission wavelength, said n-modal distribution in emission wavelength comprising n peaks in a plot of dot density as a function of emission wavelength where n is an integer of at least 2, the photon source further comprising isolating means for isolating the emission from a predetermined number of quantum dots.

Abstract: A receiver for receiving encoded photons in a quantum communication system, the receiver comprising a decoder for decoding received encoded photons and a detector for detecting photons outputted from said decoder, the receiver further comprising a band pass filter configured such that said encoded photons pass through the filter before entering the detector

Abstract: A circuit for conditioning the output of a single photon detector, the output of said detector having a stepped electrical output signal with respect to time, the circuit comprising a band pass amplifier, said band pass amplifier having a 3 dB breakpoint equal to and less than the inverse of the expected duration of the rising or falling step of said detector output.

Abstract: A quantum communication system comprising an emitter and a receiver, said emitter comprising encoding means and at least one photon source, said emitter being configured to pass a signal pulse and a reference pulse, which are separated in time, through said encoding means and output the signal pulse and the reference pulse, said reference pulse having a higher probability of containing more than one photon than said signal pulse, said receiver comprising decoding means and at least one detector for measuring said signal pulse and said reference pulse.