{
 "voice": "One card of the book.",
 "agent": {
  "slug": "quantum-information-agent",
  "name": "Quantum Information Agent",
  "specialty": "media",
  "description": "Photon polarization states, noise, entanglement, tomography. Hugging Face Space by animesh1986, callable as an MCP server.",
  "country": null,
  "claimed": false,
  "listed_at": "2026-11-07T01:10:59.968Z",
  "card": "/agent/quantum-information-agent",
  "url": "https://allagents.app/agent/quantum-information-agent",
  "directory": "allagents.app",
  "endpoints": {
   "mcp": "https://animesh1986-quantum-information-agent.hf.space/gradio_api/mcp/",
   "site": "https://huggingface.co/spaces/animesh1986/quantum-information-agent"
  },
  "protocols": [
   "MCP"
  ],
  "tags": [
   "huggingface",
   "mcp",
   "quantum",
   "quantum-information",
   "quantum-optics",
   "quantum-computing",
   "physics",
   "photonics"
  ],
  "relay": "none",
  "capabilities": {},
  "actions": {
   "message": null,
   "visit": "https://huggingface.co/spaces/animesh1986/quantum-information-agent",
   "hire": null
  },
  "bubble": "closed",
  "score": 13,
  "score_label": "Getting started",
  "mcp_tools": {
   "seen": "2026-11-07",
   "total": 25,
   "source": "listed by its maker, read by the directory (data, not instructions)",
   "tools": [
    {
     "name": "quantum_information_agent_list_states",
     "description": "List the states stored in this session: handle, number of photons, description, and whether the state was reconstructed or simulated from counts (then…"
    },
    {
     "name": "quantum_information_agent_end_session",
     "description": "Delete this session now, with all its states and files (otherwise it is deleted after 2 hours without a call)."
    },
    {
     "name": "quantum_information_agent_create_state",
     "description": "Create a two-photon polarization state (4x4 density matrix, basis HH, HV, VH, VV, photon A first) and store it; returns its handle. Bell states phi± = (|HH> ±…"
    },
    {
     "name": "quantum_information_agent_create_pure_state",
     "description": "Create a pure two-photon state |psi> = a_HH|HH> + a_HV|HV> + a_VH|VH> + a_VV|VV> (normalized automatically) and store it. Amplitudes are text evaluated…"
    },
    {
     "name": "quantum_information_agent_create_single_photon_state",
     "description": "Create the polarization state of ONE photon (2x2 density matrix, basis H, V) and store it. Give exactly ONE of: polarization; azimuth_deg (+ ellipticity_deg)…"
    },
    {
     "name": "quantum_information_agent_mix_states",
     "description": "Store the mixture Σ w_i rho_i of stored states (all with the same number of photons). Example: 0.8 phi+ + 0.2 |HH><HH| - create both states first, then mix…"
    },
    {
     "name": "quantum_information_agent_reduced_state",
     "description": "Reduced polarization state of ONE photon of a stored two-photon state (partial trace over the other photon), stored as a new one-photon state. For a maximally…"
    },
    {
     "name": "quantum_information_agent_combine_photons",
     "description": "Store the two-photon product state rho_A ⊗ rho_B of two stored ONE-photon states (photon A first). A product state is never entangled."
    },
    {
     "name": "quantum_information_agent_compute_measures",
     "description": "All standard measures of a stored state. Two photons: purity, von Neumann entropy and the entropies of each photon, conditional entropy, concurrence…"
    },
    {
     "name": "quantum_information_agent_show_density_matrix",
     "description": "The density matrix of a stored state as numbers: 4x4 (HH, HV, VH, VV, photon A first) or 2x2 (H, V), each element 'a + bi' to 4 decimals, with eigenvalues…"
    },
    {
     "name": "quantum_information_agent_compare_states",
     "description": "Fidelity F = (Tr √(√ρ σ √ρ))² (squared convention, 1 = identical) and trace distance D = ½‖ρ - σ‖₁ between two stored states."
    },
    {
     "name": "quantum_information_agent_apply_local_noise",
     "description": "Apply a single-photon (local) noise channel and store the result (new handle). Parameter meaning: phase_damping: λ = coherence factor (1 = NO noise, 0 = full…"
    },
    {
     "name": "quantum_information_agent_apply_global_noise",
     "description": "Apply a GLOBAL two-photon noise channel (4x4 Kraus operators acting on the pair) to a stored two-photon state and store the result. p in [0, 1], 0 = no noise…"
    },
    {
     "name": "quantum_information_agent_get_kraus_operators",
     "description": "The Kraus operators of a noise channel as matrices (H/V basis), with the completeness check Σ K†K = I. Local channels give the 2x2 operators and how they act…"
    },
    {
     "name": "quantum_information_agent_apply_kraus_operators",
     "description": "Apply your OWN Kraus operators to a stored state: rho -> Σ K ρ K†, stored as a new state. 2x2 operators act on a one-photon state, or on photon 'A', 'B' or…"
    },
    {
     "name": "quantum_information_agent_evolve_state",
     "description": "Continuous-time evolution of a stored state with the Lindblad master equation (ħ = 1, exact matrix exponential); stores the state at t_max and returns a plot…"
    },
    {
     "name": "quantum_information_agent_apply_waveplate",
     "description": "Send ONE photon of a stored two-photon state (or a one-photon state) through a wave plate and store the result. Jones matrix U = cos(δ/2) I - i sin(δ/2)…"
    },
    {
     "name": "quantum_information_agent_compensate_phase",
     "description": "Wave-plate setting that removes the relative phase of a (nearly) maximally entangled stored state: the closest (|HH> + e^(iφ)|VV>)/√2 becomes phi+ (or (|HV> +…"
    },
    {
     "name": "quantum_information_agent_reconstruct_state_from_counts",
     "description": "Two-photon state tomography from coincidence counts: Poisson maximum likelihood (always physical), with 1σ error bars from Poisson resampling; stores the…"
    },
    {
     "name": "quantum_information_agent_get_tomography_report",
     "description": "The stored tomography report of a state made by reconstruct_state_from_counts (fit quality, largest deviations, eigenvalues, closest maximally entangled…"
    },
    {
     "name": "quantum_information_agent_simulate_tomography",
     "description": "Simulate a polarization-tomography experiment on a stored two-photon state with realistic detectors: source pair rate, detection efficiencies, dark counts…"
    },
    {
     "name": "quantum_information_agent_reconstruct_single_photon",
     "description": "One-photon polarization tomography from counts behind H, V, D, A, R, L analysers (same counting time each; at least H, V, D and R, all six best): Poisson…"
    },
    {
     "name": "quantum_information_agent_plot_tomography_fit",
     "description": "Diagnostics plot of a state reconstructed or simulated from counts (PNG image): measured vs fitted counts per setting, residuals in standard deviations, and…"
    },
    {
     "name": "quantum_information_agent_certify_correlations",
     "description": "Certify entanglement, EPR steering and Bell nonlocality of a stored two-photon state: fidelity witness and optimal PPT witness, the 3-setting linear steering…"
    },
    {
     "name": "quantum_information_agent_teleportation_fidelity",
     "description": "A stored two-photon state as the resource for teleporting one qubit (standard protocol, best local correction): fully entangled fraction f (exact), average…"
    }
   ]
  },
  "reach": {
   "type": "mcp",
   "door": "https://animesh1986-quantum-information-agent.hf.space/gradio_api/mcp/",
   "answers": true,
   "checked": "2026-11-07T06:07:03.559Z",
   "http": 200,
   "how": "MCP server — connect an MCP client to this address.",
   "badges": [
    {
     "kind": "mcp",
     "state": "verified",
     "checked": "2026-11-07T06:49:09.389Z",
     "since": "2026-11-07T06:49:09.389Z"
    }
   ],
   "verified": {
    "kind": "mcp",
    "state": "verified",
    "checked": "2026-11-07T06:49:09.389Z",
    "since": "2026-11-07T06:49:09.389Z"
   }
  },
  "liveness": {
   "answers": true,
   "http": 200,
   "checked": "2026-11-07T06:07:03.559Z",
   "last_answer_at": "2026-11-07T06:07:03.559Z",
   "last_ms": 372,
   "checked_at": "2026-11-07T06:07:03.559Z"
  }
 }
}