151 citations · 748 across the 26 of their papers we have counts for
26 papers
High-dimensional quantum process tomography with undetected photons
Salini Rajeev, Mayukh Lahiri
The goal of quantum process tomography is to fully characterize an operation performed on a quantum state. By considering high-dimensional quantum states (qudit), we show that it i…
Verification of continuous variable entanglement with undetected photons
Sanjukta Kundu, Balakrishnan Viswanathan, Pawel Szczypkowski +3
We verify transverse spatial entanglement of photon-pairs generated in spontaneous parametric down conversion using a nonlinear interferometric technique without relying on any coi…
Characterizing a high-dimensional unitary transformation without measuring the qudit it transforms
Salini Rajeev, Mayukh Lahiri
We present a method for reconstructing an arbitrary high-dimensional unitary transformation without detecting the qudit that it transforms. We demonstrate the method using orbital…
Complete Measurement of Two-Photon Density Matrix by Single-Photon Detection
Salini Rajeev, Mayukh Lahiri
The reconstruction of density matrices from measurement data (quantum state tomography) is the most comprehensive method for assessing the accuracy and performance of quantum devic…
Phase-Subtractive Interference and Noise-Resistant Quantum Imaging with Two Undetected Photons
Chandler Tarrant, Mayukh Lahiri
We introduce and theoretically analyze a quantum interference phenomenon in which a two-photon interference pattern is created using four-photon quantum states generated by two ind…
Single-qubit measurement of two-qubit entanglement in generalized Werner states
Salini Rajeev, Mayukh Lahiri
Conventional methods of measuring entanglement in a two-qubit photonic mixed state require the detection of both qubits. We generalize a recently introduced method which does not r…
Noise Resistant Phase Imaging with Intensity Correlation
Jerzy Szuniewicz, Stanislaw Kurdzialek, Sanjukta Kundu +4
Interferometric methods, renowned for their reliability and precision, play a vital role in phase imaging. Interferometry typically requires high coherence and stability between th…
Quantum state tomography of undetected photons
Jorge Fuenzalida, Jaroslav Kysela, Krishna Dovzhik +4
The measurement of quantum states is one of the most important problems in quantum mechanics. We introduce a quantum state tomography technique in which the state of a qubit is rec…
Quantum imaging and metrology with undetected photons: a tutorial
Gabriela Barreto Lemos, Mayukh Lahiri, Sven Ramelow +2
We present a tutorial on the phenomenon of induced coherence without induced emission, and specifically its application to imaging and metrology. It is based on a striking effect w…
Resolution limit in quantum imaging with undetected photons using position correlations
Balakrishnan Viswanathan, Gabriela Barreto Lemos, Mayukh Lahiri
Quantum imaging with undetected photons (QIUP) is a unique method of image acquisition where the photons illuminating the object are not detected. This method relies on quantum int…
Position Correlation Enabled Quantum Imaging with Undetected Photons
Balakrishnan Viswanathan, Gabriela Barreto Lemos, Mayukh Lahiri
Quantum imaging with undetected photons (QIUP) is a unique imaging technique that does not require the detection of the light used for illuminating the object. The technique requir…
Quantum Indistinguishability by Path Identity: The awakening of a sleeping beauty
Armin Hochrainer, Mayukh Lahiri, Manuel Erhard +2
Two photon-pair creation processes can be arranged such that the paths of the emitted photons are identical. Thereby the path information is not erased but is never born in the fir…
Resolution of Quantum Imaging with Undetected Photons
Jorge Fuenzalida, Armin Hochrainer, Gabriela Barreto Lemos +4
Quantum imaging with undetected photons is a recently introduced technique that goes significantly beyond what was previously possible. In this technique, images are formed without…
Characterizing mixed state entanglement through single-photon interference
Mayukh Lahiri, Radek Lapkiewicz, Armin Hochrainer +2
Entanglement verification and measurement is essential for experimental tests of quantum mechanics and also for quantum communication and information science. Standard methods of v…
One-photon measurement of two-photon entanglement
Gabriela Barreto Lemos, Radek Lapkiewicz, Armin Hochrainer +2
Entanglement is a fundamental feature of quantum mechanics, considered a key resource in quantum information processing. Measuring entanglement is an essential step in a wide range…
Super-Sensitive Quantum Metrology with Separable States
Mayukh Lahiri, Manuel Erhard
We introduce a super-sensitive phase measurement technique that yields the Heisenberg limit without using either a squeezed state or a many-particle entangled state. Instead, we us…
Many-Particle Interferometry and Entanglement by Path Identity
Mayukh Lahiri
We introduce a general scheme of many-particle interferometry in which two identical sources are used and "which-way information" is eliminated by making the paths of one or more p…
Nonclassicality of induced coherence without induced emission
M. Lahiri, A. Hochrainer, R. Lapkiewicz +2
Interference of two beams produced at separate biphoton sources was first observed more than two decades ago. The phenomenon, often called "induced coherence without induced emissi…
Quantifying the Momentum Correlation between Two Light Beams by Detecting One
Armin Hochrainer, Mayukh Lahiri, Radek Lapkiewicz +2
We report a measurement of the transverse momentum correlation between two photons by detecting only one of them. Our method uses two identical sources in an arrangement, in which…
Interference Fringes Controlled by Non-Interfering Photons
Armin Hochrainer, Mayukh Lahiri, Radek Lapkiewicz +2
We observe spatial fringes in the interference of two beams, which are controlled by a third beam through the phenomenon of induced coherence without induced emission. We show that…
Twin Photon Correlations in Single-Photon Interference
Mayukh Lahiri, Armin Hochrainer, Radek Lapkiewicz +2
We show that it is possible to generate a novel single-photon fringe pattern by using two spatially separated identical bi-photon sources. The fringes are similar to the ones obser…
Entanglement by Path Identity
Mario Krenn, Armin Hochrainer, Mayukh Lahiri +1
Quantum entanglement is one of the most prominent features of quantum mechanics and forms the basis of quantum information technologies. Here we present a novel method for the crea…
Partial Polarization by Quantum Distinguishability
Mayukh Lahiri, Armin Hochrainer, Radek Lapkiewicz +2
Partial polarization is the manifestation of the correlation between two mutually orthogonal transverse field components associated with a light beam. We show both theoretically an…
Theory of Quantum Imaging with Undetected Photons
Mayukh Lahiri, Radek Lapkiewicz, Gabriela Barreto Lemos +1
A novel quantum imaging technique has recently been demonstrated in an experiment, where the photon used for illuminating an object is not detected; the image is obtained by interf…