Quantum Teleportation

Quantum teleportation experiments generally have several prerequisites:

1. means of generating an entangled EPR pair of qubits as well as a qubit that is to be teleported
2. a conventional communication channel capable of transmitting two classical bits
3. means of performing a Bell measurement on the EPR pair, and manipulating the quantum state of one of the pair

The teleportation success is then typically analysed via coincidence correlation methods. For that purpose, the photons emitted by the systems are split using, e.g., a 50 / 50 beamsplitter or a polarization splitter and send onto two single photon sensitive detectors. The output of these detectors is then fed into a time tagging unit with high temporal resolution to measure the coincidence.
 

Time-tagging Units

MultiHarp 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 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

PicoHarp 330

Precise and Versatile Event Timer & TCSPC Unit

• Outstanding timing precision of 2 ps RMS for single channel, 3 ps RMS between channels
• Cutting-edge time resolution of 1 ps
• Choice of edge triggers or Constant Fraction Discriminators (CFD)
• Sustained time tagging with up to 85 Mcps via USB 3.0 
  tion

TimeHarp 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 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

Software

QuCoa

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