Density matrix simulator (DM1) - Amazon Braket

Density matrix simulator (DM1)

DM1 is an on-demand, high-performance, density matrix simulator. It can simulate circuits of up to 17 qubits.

DM1 has a maximum runtime of 6 hours, a default of 35 concurrent quantum tasks, and a maximum of 50 concurrent quantum tasks.

DM1 results

DM1 can provide the following results, given the specified number of shots:

  • Sample: Shots > 0

  • Expectation: Shots >= 0

  • Variance: Shots >= 0

  • Probability: Shots > 0

  • Reduced density matrix: Shots = 0, up to max 8 qubits

For more information about results, see Result types.

DM1 is always available, it runs your circuits on demand, and it can run multiple circuits in parallel. The runtime scales linearly with the number of operations and exponentially with the number of qubits. The number of shots has a small impact on the runtime. To learn more, see Compare simulators.

Noise gates and limitations 

AmplitudeDamping
    Probability has to be within [0,1]
BitFlip
    Probability has to be within [0,0.5]
Depolarizing
    Probability has to be within [0,0.75]
GeneralizedAmplitudeDamping
    Probability has to be within [0,1]
PauliChannel
    The sum of the probabilities has to be within [0,1]
Kraus
    At most 2 qubits
    At most 4 (16) Kraus matrices for 1 (2) qubit
PhaseDamping
    Probability has to be within [0,1]
PhaseFlip
    Probability has to be within [0,0.5]
TwoQubitDephasing
    Probability has to be within [0,0.75]
TwoQubitDepolarizing
    Probability has to be within [0,0.9375]