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Quantum Optics

Quantum Information Processing

Computing with qubits

Quantum Information Processing focuses on information processing and computing based on quantum mechanics. While current digital computers encode data in binary digits (bits), quantum computers aren't limited to two states. They encode information as quantum bits, or qubits, which can exist in superposition. Qubits can be implemented with atoms, ions, photons or electrons and suitable control devices that work together to act as computer memory and a processor. Because a quantum computer can contain these multiple states simultaneously, they provide an inherent parallelism. This will enable them to solve certain problems much faster than any classical computer using the best currently known algorithms, like integer factorization or the simulation of quantum many-body systems. Right now the quantum computer is still in its infancy. First steps on that road are the simplest building blocks such as quantum logic gates and memory based on genuine quantum effects such as superposition and entanglement.

There are several methods used in the development of the necessary building blocks of a quantum computer. The study and the functionality test of these blocks is then very often performed via coincidence correlation methods or timing analysis of photon detector signals in order to prove the general working pricingple of the building block under study.

PicoQuant offers several instruments such as time-tagging units and single photon sensitive detectors that can be used to perform coincidence correlation or timing analysis:

Time-tagging Units

MultiHarp 150 - High-Throughput Multichannel Event Timer & TCSPC UnitMultiHarp 150

High-Throughput Multichannel Event Timer & TCSPC Unit

  • 4, 8, or 16 independent input channels and common sync channel (up to 1.2 GHz)
  • High sustained data throughput (80 Mcps in time tagging mode, 180 Mcps in histogramming mode)
  • Record-breaking dead time (650 ps) per channel
  • No dead time across channels

HydraHarp 400 - multichannel time tagging moduleHydraHarp 400

Multichannel Picosecond Event Timer & TCSPC Module

  • Up to 8 independent input channels and common synch channel (up to 150 MHz)
  • Time channel width of 1 ps
  • Time tagging with sustained count rates up to 40 Mcps
  • USB 3.0 connection

PicoHarp300 - Stand-alone TCSPC module with USB interface PicoHarp 300

Stand-alone Event Timer with USB Interface

  • Two identical synchronized but independent input channels
  • Time channel width of 4 ps
  • Time tagging with sustained count rates up to 5 Mcps
  • USB 2.0 connection

TimeHarp260 - TCSPC and MCS board with PCIe interfaceTimeHarp 260

TCSPC and MCS Board with PCIe Interface

  • One or two independent input channels and common synch channel (up to 84 MHz)
  • Two models with either 25 ps (PICO model) or 1 ns (NANO model) base resolution
  • Ultra short dead time (< 25 ns for PICO model, < 1 ns for NANO model)
  • PCIe interface

Single Photon Detectors

PDM SPAD - single photon sensitive detectorPDM Series

Single Photon Avalanche Diodes

  • Timing resolution down to < 50 ps (FWHM)
  • Detection efficiency up to 49%
  • Different active areas: 20, 50, and 100 µm
  • Ultra stable at high count rates


QuCoaQuCoa - Quantum Correlation Analysis Software

Quantum Correlation Analysis Software

  • Antibunching (g(2)) measurements including fitting to several models
  • Coincidence counting / event filtering, using AND, OR, NOT operators
  • Preview of antibunching curve and correlation data during measurement
  • Remote control via TCP/IP Interface

The following presentations are related to quantum information processing and were recorded at our International Symposium on "Single Photon based Quantum Technologies" in September 2020.

Latest 10 publications related to Quantum Information Processing

The following list is an extract of 10 recent publications from our bibliography that either bear reference or are releated to this application and our products in some way. Do you miss your publication? If yes, we will be happy to include it in our bibliography. Please send an e-mail to info@picoquant.com containing the appropriate citation. Thank you very much in advance for your kind co-operation.